Merge branch 'master' into 31053-pipeline-ux31053-pipeline-ux

* master:
  Fallback to default pattern when note does not belong to project
  Merge request widget redesign
  Fixed focused test in notes spec
  Fixed UP arrow key not editing last comment in discussion
  Fix skipped manual actions issue in pipeline processing
  Fix notify_only_default_branch check for Slack service

205 files changed, 7156 insertions, 1562 deletions

diff --git a/app/assets/javascripts/diff_notes/components/resolve_btn.js b/app/assets/javascripts/diff_notes/components/resolve_btn.js
index 92f6fd654b3..9d51fb53eb2 100644
--- a/app/assets/javascripts/diff_notes/components/resolve_btn.js
+++ b/app/assets/javascripts/diff_notes/components/resolve_btn.js
@@ -88,6 +88,7 @@ const ResolveBtn = Vue.extend({
 
           CommentsStore.update(this.discussionId, this.noteId, !this.isResolved, resolved_by);
           this.discussion.updateHeadline(data);
+          gl.mrWidget.checkStatus();
         } else {
           new Flash(errorFlashMsg);
         }
diff --git a/app/assets/javascripts/diff_notes/services/resolve.js b/app/assets/javascripts/diff_notes/services/resolve.js
index 4ea6ba8a73d..ba4f6d36fcb 100644
--- a/app/assets/javascripts/diff_notes/services/resolve.js
+++ b/app/assets/javascripts/diff_notes/services/resolve.js
@@ -49,6 +49,7 @@ class ResolveServiceClass {
           discussion.resolveAllNotes(resolved_by);
         }
 
+        gl.mrWidget.checkStatus();
         discussion.updateHeadline(data);
       } else {
         throw new Error('An error occurred when trying to resolve discussion.');
diff --git a/app/assets/javascripts/dispatcher.js b/app/assets/javascripts/dispatcher.js
index bf802056d36..abb871c3af0 100644
--- a/app/assets/javascripts/dispatcher.js
+++ b/app/assets/javascripts/dispatcher.js
@@ -10,7 +10,6 @@
 /* global IssuableForm */
 /* global LabelsSelect */
 /* global MilestoneSelect */
-/* global MergedButtons */
 /* global Commit */
 /* global NotificationsForm */
 /* global TreeView */
@@ -216,15 +215,10 @@ const ShortcutsBlob = require('./shortcuts_blob');
           new gl.Diff();
           shortcut_handler = new ShortcutsIssuable(true);
           new ZenMode();
-          new MergedButtons();
-          break;
-        case 'projects:merge_requests:commits':
-          new MergedButtons();
           break;
         case "projects:merge_requests:diffs":
           new gl.Diff();
           new ZenMode();
-          new MergedButtons();
           break;
         case 'dashboard:activity':
           new gl.Activities();
diff --git a/app/assets/javascripts/lib/utils/simple_poll.js b/app/assets/javascripts/lib/utils/simple_poll.js
new file mode 100644
index 00000000000..25ca98afbe7
--- /dev/null
+++ b/app/assets/javascripts/lib/utils/simple_poll.js
@@ -0,0 +1,15 @@
+export default (fn, interval = 2000, timeout = 60000) => {
+  const startTime = Date.now();
+
+  return new Promise((resolve, reject) => {
+    const stop = arg => ((arg instanceof Error) ? reject(arg) : resolve(arg));
+    const next = () => {
+      if (Date.now() - startTime < timeout) {
+        setTimeout(fn.bind(null, next, stop), interval);
+      } else {
+        reject(new Error('SIMPLE_POLL_TIMEOUT'));
+      }
+    };
+    fn(next, stop);
+  });
+};
diff --git a/app/assets/javascripts/main.js b/app/assets/javascripts/main.js
index 1b0d5fc92e3..a07aa047293 100644
--- a/app/assets/javascripts/main.js
+++ b/app/assets/javascripts/main.js
@@ -123,8 +123,6 @@ import './member_expiration_date';
 import './members';
 import './merge_request';
 import './merge_request_tabs';
-import './merge_request_widget';
-import './merged_buttons';
 import './milestone';
 import './milestone_select';
 import './mini_pipeline_graph_dropdown';
diff --git a/app/assets/javascripts/merge_request.js b/app/assets/javascripts/merge_request.js
index 5e01aacf2ba..ed342b9990f 100644
--- a/app/assets/javascripts/merge_request.js
+++ b/app/assets/javascripts/merge_request.js
@@ -106,6 +106,21 @@ require('./merge_request_tabs');
       });
     };
 
+    MergeRequest.prototype.updateStatusText = function(classToRemove, classToAdd, newStatusText) {
+      $('.detail-page-header .status-box')
+        .removeClass(classToRemove)
+        .addClass(classToAdd)
+        .find('span')
+        .text(newStatusText);
+    };
+
+    MergeRequest.prototype.decreaseCounter = function(by = 1) {
+      const $el = $('.nav-links .js-merge-counter');
+      const count = Math.max((parseInt($el.text().replace(/[^\d]/, ''), 10) - by), 0);
+
+      $el.text(gl.text.addDelimiter(count));
+    };
+
     return MergeRequest;
   })();
 }).call(window);
diff --git a/app/assets/javascripts/merge_request_widget/ci_bundle.js b/app/assets/javascripts/merge_request_widget/ci_bundle.js
deleted file mode 100644
index 21d7c3e168e..00000000000
--- a/app/assets/javascripts/merge_request_widget/ci_bundle.js
+++ /dev/null
@@ -1,53 +0,0 @@
-/* global merge_request_widget */
-
-(() => {
-  $(() => {
-    /* TODO: This needs a better home, or should be refactored. It was previously contained
-     * in a script tag in app/views/projects/merge_requests/widget/open/_accept.html.haml,
-     * but Vue chokes on script tags and prevents their execution. So it was moved here
-     * temporarily.
-     * */
-
-    $(document)
-    .off('ajax:send', '.accept-mr-form')
-    .on('ajax:send', '.accept-mr-form', () => {
-      $('.accept-mr-form :input').disable();
-    });
-
-    $(document)
-    .off('click', '.accept-merge-request')
-    .on('click', '.accept-merge-request', () => {
-      $('.js-merge-button, .js-merge-when-pipeline-succeeds-button').html('<i class="fa fa-spinner fa-spin"></i> Merge in progress');
-    });
-
-    $(document)
-    .off('click', '.merge-when-pipeline-succeeds')
-    .on('click', '.merge-when-pipeline-succeeds', () => {
-      $('#merge_when_pipeline_succeeds').val('1');
-    });
-
-    $(document)
-    .off('click', '.js-merge-dropdown a')
-    .on('click', '.js-merge-dropdown a', (e) => {
-      e.preventDefault();
-      $(e.target).closest('form').submit();
-    });
-    if ($('.rebase-in-progress').length) {
-      merge_request_widget.rebaseInProgress();
-    } else if ($('.rebase-mr-form').length) {
-      $(document)
-      .off('ajax:send', '.rebase-mr-form')
-      .on('ajax:send', '.rebase-mr-form', () => {
-        $('.rebase-mr-form :input').disable();
-      });
-
-      $(document)
-      .off('click', '.js-rebase-button')
-      .on('click', '.js-rebase-button', () => {
-        $('.js-rebase-button').html("<i class='fa fa-spinner fa-spin'></i> Rebase in progress");
-      });
-    } else {
-      setTimeout(() => merge_request_widget.getMergeStatus(), 200);
-    }
-  });
-})();
diff --git a/app/assets/javascripts/merged_buttons.js b/app/assets/javascripts/merged_buttons.js
deleted file mode 100644
index 7b0997c6520..00000000000
--- a/app/assets/javascripts/merged_buttons.js
+++ /dev/null
@@ -1,47 +0,0 @@
-/* eslint-disable func-names, space-before-function-paren, no-var, prefer-rest-params, wrap-iife, max-len */
-
-import '~/lib/utils/url_utility';
-
-(function() {
-  this.MergedButtons = (function() {
-    function MergedButtons() {
-      this.removeSourceBranch = this.removeSourceBranch.bind(this);
-      this.removeBranchSuccess = this.removeBranchSuccess.bind(this);
-      this.removeBranchError = this.removeBranchError.bind(this);
-      this.$removeBranchWidget = $('.remove_source_branch_widget');
-      this.$removeBranchProgress = $('.remove_source_branch_in_progress');
-      this.$removeBranchFailed = $('.remove_source_branch_widget.failed');
-      this.cleanEventListeners();
-      this.initEventListeners();
-    }
-
-    MergedButtons.prototype.cleanEventListeners = function() {
-      $(document).off('click', '.remove_source_branch');
-      $(document).off('ajax:success', '.remove_source_branch');
-      return $(document).off('ajax:error', '.remove_source_branch');
-    };
-
-    MergedButtons.prototype.initEventListeners = function() {
-      $(document).on('click', '.remove_source_branch', this.removeSourceBranch);
-      $(document).on('ajax:success', '.remove_source_branch', this.removeBranchSuccess);
-      $(document).on('ajax:error', '.remove_source_branch', this.removeBranchError);
-    };
-
-    MergedButtons.prototype.removeSourceBranch = function() {
-      this.$removeBranchWidget.hide();
-      return this.$removeBranchProgress.show();
-    };
-
-    MergedButtons.prototype.removeBranchSuccess = function() {
-      gl.utils.refreshCurrentPage();
-    };
-
-    MergedButtons.prototype.removeBranchError = function() {
-      this.$removeBranchWidget.hide();
-      this.$removeBranchProgress.hide();
-      return this.$removeBranchFailed.show();
-    };
-
-    return MergedButtons;
-  })();
-}).call(window);
diff --git a/app/assets/javascripts/notes.js b/app/assets/javascripts/notes.js
index 55391ebc089..194c29f4710 100644
--- a/app/assets/javascripts/notes.js
+++ b/app/assets/javascripts/notes.js
@@ -175,7 +175,7 @@ const normalizeNewlines = function(str) {
           if ($textarea.val() !== '') {
             return;
           }
-          myLastNote = $("li.note[data-author-id='" + gon.current_user_id + "'][data-editable]:last");
+          myLastNote = $(`li.note[data-author-id='${gon.current_user_id}'][data-editable]:last`, $textarea.closest('.note, #notes'));
           if (myLastNote.length) {
             myLastNoteEditBtn = myLastNote.find('.js-note-edit');
             return myLastNoteEditBtn.trigger('click', [true, myLastNote]);
@@ -276,7 +276,7 @@ const normalizeNewlines = function(str) {
       var votesBlock;
       if (noteEntity.commands_changes) {
         if ('merge' in noteEntity.commands_changes) {
-          $.get(mrRefreshWidgetUrl);
+          Notes.checkMergeRequestStatus();
         }
 
         if ('emoji_award' in noteEntity.commands_changes) {
@@ -424,6 +424,7 @@ const normalizeNewlines = function(str) {
       }
 
       gl.utils.localTimeAgo($('.js-timeago'), false);
+      Notes.checkMergeRequestStatus();
       return this.updateNotesCount(1);
     };
 
@@ -769,7 +770,8 @@ const normalizeNewlines = function(str) {
           }
         };
       })(this));
-      // Decrement the "Discussions" counter only once
+
+      Notes.checkMergeRequestStatus();
       return this.updateNotesCount(-1);
     };
 
@@ -1115,6 +1117,12 @@ const normalizeNewlines = function(str) {
       return $form;
     };
 
+    Notes.checkMergeRequestStatus = function() {
+      if (gl.utils.getPagePath(1) === 'merge_requests') {
+        gl.mrWidget.checkStatus();
+      }
+    };
+
     Notes.animateAppendNote = function(noteHtml, $notesList) {
       const $note = $(noteHtml);
 
diff --git a/app/assets/javascripts/pipelines/components/stage.js b/app/assets/javascripts/pipelines/components/stage.js
new file mode 100644
index 00000000000..034e8d3280e
--- /dev/null
+++ b/app/assets/javascripts/pipelines/components/stage.js
@@ -0,0 +1,104 @@
+/* global Flash */
+import { borderlessStatusIconEntityMap } from '../../vue_shared/ci_status_icons';
+
+export default {
+  data() {
+    return {
+      builds: '',
+      spinner: '<span class="fa fa-spinner fa-spin"></span>',
+    };
+  },
+
+  props: {
+    stage: {
+      type: Object,
+      required: true,
+    },
+  },
+
+  updated() {
+    if (this.builds) {
+      this.stopDropdownClickPropagation();
+    }
+  },
+
+  methods: {
+    fetchBuilds(e) {
+      const ariaExpanded = e.currentTarget.attributes['aria-expanded'];
+
+      if (ariaExpanded && (ariaExpanded.textContent === 'true')) return null;
+
+      return this.$http.get(this.stage.dropdown_path)
+        .then((response) => {
+          this.builds = JSON.parse(response.body).html;
+        }, () => {
+          const flash = new Flash('Something went wrong on our end.');
+          return flash;
+        });
+    },
+
+    /**
+     * When the user right clicks or cmd/ctrl + click in the job name
+     * the dropdown should not be closed and the link should open in another tab,
+     * so we stop propagation of the click event inside the dropdown.
+     *
+     * Since this component is rendered multiple times per page we need to guarantee we only
+     * target the click event of this component.
+     */
+    stopDropdownClickPropagation() {
+      $(this.$el.querySelectorAll('.js-builds-dropdown-list a.mini-pipeline-graph-dropdown-item')).on('click', (e) => {
+        e.stopPropagation();
+      });
+    },
+  },
+  computed: {
+    buildsOrSpinner() {
+      return this.builds ? this.builds : this.spinner;
+    },
+    dropdownClass() {
+      if (this.builds) return 'js-builds-dropdown-container';
+      return 'js-builds-dropdown-loading builds-dropdown-loading';
+    },
+    buildStatus() {
+      return `Build: ${this.stage.status.label}`;
+    },
+    tooltip() {
+      return `has-tooltip ci-status-icon ci-status-icon-${this.stage.status.group}`;
+    },
+    triggerButtonClass() {
+      return `mini-pipeline-graph-dropdown-toggle has-tooltip js-builds-dropdown-button ci-status-icon-${this.stage.status.group}`;
+    },
+    svgHTML() {
+      return borderlessStatusIconEntityMap[this.stage.status.icon];
+    },
+  },
+  watch: {
+    'stage.title': function stageTitle() {
+      $(this.$refs.button).tooltip('destroy').tooltip();
+    },
+  },
+  template: `
+    <div>
+      <button
+        @click="fetchBuilds($event)"
+        :class="triggerButtonClass"
+        :title="stage.title"
+        data-placement="top"
+        data-toggle="dropdown"
+        type="button"
+        ref="button"
+        :aria-label="stage.title">
+        <span v-html="svgHTML" aria-hidden="true"></span>
+        <i class="fa fa-caret-down" aria-hidden="true"></i>
+      </button>
+      <ul class="dropdown-menu mini-pipeline-graph-dropdown-menu js-builds-dropdown-container">
+        <div class="arrow-up" aria-hidden="true"></div>
+        <div
+          :class="dropdownClass"
+          class="js-builds-dropdown-list scrollable-menu"
+          v-html="buildsOrSpinner">
+        </div>
+      </ul>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author.js
new file mode 100644
index 00000000000..a01cb8cc202
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author.js
@@ -0,0 +1,23 @@
+export default {
+  name: 'MRWidgetAuthor',
+  props: {
+    author: { type: Object, required: true },
+    showAuthorName: { type: Boolean, required: false, default: true },
+    showAuthorTooltip: { type: Boolean, required: false, default: false },
+  },
+  template: `
+    <a
+      :href="author.webUrl || author.web_url"
+      class="author-link"
+      :class="{ 'has-tooltip': showAuthorTooltip }"
+      :title="author.name">
+      <img
+        :src="author.avatarUrl || author.avatar_url"
+        class="avatar avatar-inline s16" />
+      <span
+        v-if="showAuthorName"
+        class="author">{{author.name}}
+      </span>
+    </a>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author_time.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author_time.js
new file mode 100644
index 00000000000..6d2ed5fda64
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author_time.js
@@ -0,0 +1,27 @@
+import MRWidgetAuthor from './mr_widget_author';
+
+export default {
+  name: 'MRWidgetAuthorTime',
+  props: {
+    actionText: { type: String, required: true },
+    author: { type: Object, required: true },
+    dateTitle: { type: String, required: true },
+    dateReadable: { type: String, required: true },
+  },
+  components: {
+    'mr-widget-author': MRWidgetAuthor,
+  },
+  template: `
+    <h4 class="js-mr-widget-author">
+      {{actionText}}
+      <mr-widget-author :author="author" />
+      <time
+        :title="dateTitle"
+        data-toggle="tooltip"
+        data-placement="top"
+        data-container="body">
+        {{dateReadable}}
+      </time>
+    </h4>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_deployment.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_deployment.js
new file mode 100644
index 00000000000..630e80a7408
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_deployment.js
@@ -0,0 +1,118 @@
+/* global Flash */
+
+import '~/lib/utils/datetime_utility';
+import { statusClassToSvgMap } from '../../vue_shared/pipeline_svg_icons';
+import MemoryUsage from './mr_widget_memory_usage';
+import MRWidgetService from '../services/mr_widget_service';
+
+export default {
+  name: 'MRWidgetDeployment',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+  },
+  components: {
+    'mr-widget-memory-usage': MemoryUsage,
+  },
+  computed: {
+    svg() {
+      return statusClassToSvgMap.icon_status_success;
+    },
+  },
+  methods: {
+    formatDate(date) {
+      return gl.utils.getTimeago().format(date);
+    },
+    hasExternalUrls(deployment = {}) {
+      return deployment.external_url && deployment.external_url_formatted;
+    },
+    hasDeploymentTime(deployment = {}) {
+      return deployment.deployed_at && deployment.deployed_at_formatted;
+    },
+    hasDeploymentMeta(deployment = {}) {
+      return deployment.url && deployment.name;
+    },
+    stopEnvironment(deployment) {
+      const msg = 'Are you sure you want to stop this environment?';
+      const isConfirmed = confirm(msg); // eslint-disable-line
+
+      if (isConfirmed) {
+        MRWidgetService.stopEnvironment(deployment.stop_url)
+          .then(res => res.json())
+          .then((res) => {
+            if (res.redirect_url) {
+              gl.utils.visitUrl(res.redirect_url);
+            }
+          })
+          .catch(() => {
+            new Flash('Something went wrong while stopping this environment. Please try again.'); // eslint-disable-line
+          });
+      }
+    },
+  },
+  template: `
+    <div class="mr-widget-heading">
+      <div v-for="deployment in mr.deployments">
+        <div class="ci-widget">
+          <div class="ci-status-icon ci-status-icon-success">
+            <span class="js-icon-link icon-link">
+              <span
+                v-html="svg"
+                aria-hidden="true"></span>
+            </span>
+          </div>
+          <span>
+            <span
+              v-if="hasDeploymentMeta(deployment)">
+              Deployed to
+            </span>
+            <a
+              v-if="hasDeploymentMeta(deployment)"
+              :href="deployment.url"
+              target="_blank"
+              rel="noopener noreferrer nofollow"
+              class="js-deploy-meta">
+              {{deployment.name}}
+            </a>
+            <span
+              v-if="hasExternalUrls(deployment)">
+              on
+            </span>
+            <a
+              v-if="hasExternalUrls(deployment)"
+              :href="deployment.external_url"
+              target="_blank"
+              rel="noopener noreferrer nofollow"
+              class="js-deploy-url">
+              <i
+                class="fa fa-external-link"
+                aria-hidden="true" />
+              {{deployment.external_url_formatted}}
+            </a>
+            <span
+              v-if="hasDeploymentTime(deployment)"
+              :data-title="deployment.deployed_at_formatted"
+              class="js-deploy-time"
+              data-toggle="tooltip"
+              data-placement="top">
+              {{formatDate(deployment.deployed_at)}}
+            </span>
+            <button
+              type="button"
+              v-if="deployment.stop_url"
+              @click="stopEnvironment(deployment)"
+              class="btn btn-default btn-xs">
+              Stop environment
+            </button>
+          </span>
+        </div>
+        <mr-widget-memory-usage
+          v-if="deployment.metrics_url"
+          :mr="mr"
+          :service="service"
+          :metricsUrl="deployment.metrics_url"
+        />
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_header.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_header.js
new file mode 100644
index 00000000000..4a1fd881169
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_header.js
@@ -0,0 +1,98 @@
+require('../../lib/utils/text_utility');
+
+export default {
+  name: 'MRWidgetHeader',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  computed: {
+    shouldShowCommitsBehindText() {
+      return this.mr.divergedCommitsCount > 0;
+    },
+    commitsText() {
+      return gl.text.pluralize('commit', this.mr.divergedCommitsCount);
+    },
+  },
+  methods: {
+    isBranchTitleLong(branchTitle) {
+      return branchTitle.length > 32;
+    },
+  },
+  template: `
+    <div class="mr-source-target">
+      <div
+        v-if="mr.isOpen"
+        class="pull-right">
+        <a
+          href="#modal_merge_info"
+          data-toggle="modal"
+          class="btn inline btn-grouped btn-sm">
+          Check out branch
+        </a>
+        <span class="dropdown inline prepend-left-5">
+          <a
+            class="btn btn-sm dropdown-toggle"
+            data-toggle="dropdown"
+            aria-label="Download as"
+            role="button">
+            <i
+              class="fa fa-download"
+              aria-hidden="true" />
+            <i
+              class="fa fa-caret-down"
+              aria-hidden="true" />
+          </a>
+          <ul class="dropdown-menu dropdown-menu-align-right">
+            <li>
+              <a
+                :href="mr.emailPatchesPath"
+                download>
+                Email patches
+              </a>
+            </li>
+            <li>
+              <a
+                :href="mr.plainDiffPath"
+                download>
+                Plain diff
+              </a>
+            </li>
+          </ul>
+        </span>
+      </div>
+      <div class="normal">
+        <b>Request to merge</b>
+        <span
+          class="label-branch"
+          :class="{'label-truncated has-tooltip': isBranchTitleLong(mr.sourceBranch)}"
+          :title="isBranchTitleLong(mr.sourceBranch) ? mr.sourceBranch : ''"
+          data-placement="bottom"
+          v-html="mr.sourceBranchLink"></span>
+        <button
+          class="btn btn-transparent btn-clipboard has-tooltip"
+          data-title="Copy branch name to clipboard"
+          :data-clipboard-text="mr.sourceBranch">
+          <i
+            aria-hidden="true"
+            class="fa fa-clipboard"></i>
+        </button>
+        <b>into</b>
+        <span
+          class="label-branch"
+          :class="{'label-truncated has-tooltip': isBranchTitleLong(mr.targetBranch)}"
+          :title="isBranchTitleLong(mr.targetBranch) ? mr.targetBranch : ''"
+          data-placement="bottom">
+          <a
+            :href="mr.targetBranchCommitsPath">
+            {{mr.targetBranch}}
+          </a>
+        </span>
+        <span
+          v-if="shouldShowCommitsBehindText"
+          class="diverged-commits-count">
+          ({{mr.divergedCommitsCount}} {{commitsText}} behind)
+        </span>
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_memory_usage.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_memory_usage.js
new file mode 100644
index 00000000000..395cc9e91fc
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_memory_usage.js
@@ -0,0 +1,109 @@
+import statusCodes from '~/lib/utils/http_status';
+import MemoryGraph from '../../vue_shared/components/memory_graph';
+import MRWidgetService from '../services/mr_widget_service';
+
+export default {
+  name: 'MemoryUsage',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+    metricsUrl: { type: String, required: true },
+  },
+  data() {
+    return {
+      // memoryFrom: 0,
+      // memoryTo: 0,
+      memoryMetrics: [],
+      hasMetrics: false,
+      loadFailed: false,
+      loadingMetrics: true,
+      backOffRequestCounter: 0,
+    };
+  },
+  components: {
+    'mr-memory-graph': MemoryGraph,
+  },
+  methods: {
+    computeGraphData(metrics) {
+      this.loadingMetrics = false;
+      const { memory_values } = metrics;
+      // if (memory_previous.length > 0) {
+      //   this.memoryFrom = Number(memory_previous[0].value[1]).toFixed(2);
+      // }
+      //
+      // if (memory_current.length > 0) {
+      //   this.memoryTo = Number(memory_current[0].value[1]).toFixed(2);
+      // }
+
+      if (memory_values.length > 0) {
+        this.hasMetrics = true;
+        this.memoryMetrics = memory_values[0].values;
+      }
+    },
+  },
+  mounted() {
+    this.$props.loadingMetrics = true;
+    gl.utils.backOff((next, stop) => {
+      MRWidgetService.fetchMetrics(this.$props.metricsUrl)
+        .then((res) => {
+          if (res.status === statusCodes.NO_CONTENT) {
+            this.backOffRequestCounter = this.backOffRequestCounter += 1;
+            if (this.backOffRequestCounter < 3) {
+              next();
+            } else {
+              stop(res);
+            }
+          } else {
+            stop(res);
+          }
+        })
+        .catch(stop);
+    })
+    .then((res) => {
+      if (res.status === statusCodes.NO_CONTENT) {
+        return res;
+      }
+
+      return res.json();
+    })
+    .then((res) => {
+      this.computeGraphData(res.metrics);
+      return res;
+    })
+    .catch(() => {
+      this.$props.loadFailed = true;
+    });
+  },
+  template: `
+    <div class="mr-info-list mr-memory-usage">
+      <div class="legend"></div>
+      <p
+        v-if="loadingMetrics"
+        class="usage-info usage-info-loading">
+        <i
+          class="fa fa-spinner fa-spin usage-info-load-spinner"
+          aria-hidden="true" />Loading deployment statistics.
+      </p>
+      <p
+        v-if="!hasMetrics && !loadingMetrics"
+        class="usage-info usage-info-loading">
+        Deployment statistics are not available currently.
+      </p>
+      <p
+        v-if="hasMetrics"
+        class="usage-info">
+        Deployment memory usage:
+      </p>
+      <p
+        v-if="loadFailed"
+        class="usage-info">
+        Failed to load deployment statistics.
+      </p>
+      <mr-memory-graph
+        v-if="hasMetrics"
+        :metrics="memoryMetrics"
+        height="25"
+        width="100" />
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_merge_help.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_merge_help.js
new file mode 100644
index 00000000000..2fecebce7a0
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_merge_help.js
@@ -0,0 +1,23 @@
+export default {
+  name: 'MRWidgetMergeHelp',
+  props: {
+    missingBranch: { type: String, required: false, default: '' },
+  },
+  template: `
+    <section class="mr-widget-help">
+      <template
+        v-if="missingBranch">
+        If the {{missingBranch}} branch exists in your local repository, you
+      </template>
+      <template v-else>
+        You
+      </template>
+      can merge this merge request manually using the
+      <a
+        data-toggle="modal"
+        href="#modal_merge_info">
+        command line.
+      </a>
+    </section>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline.js
new file mode 100644
index 00000000000..801b9fb1ba1
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline.js
@@ -0,0 +1,76 @@
+import PipelineStage from '../../pipelines/components/stage';
+import pipelineStatusIcon from '../../vue_shared/components/pipeline_status_icon';
+import { statusClassToSvgMap } from '../../vue_shared/pipeline_svg_icons';
+
+export default {
+  name: 'MRWidgetPipeline',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  components: {
+    'pipeline-stage': PipelineStage,
+    'pipeline-status-icon': pipelineStatusIcon,
+  },
+  computed: {
+    hasCIError() {
+      const { hasCI, ciStatus } = this.mr;
+
+      return hasCI && !ciStatus;
+    },
+    svg() {
+      return statusClassToSvgMap.icon_status_failed;
+    },
+    stageText() {
+      return this.mr.pipeline.details.stages.length > 1 ? 'stages' : 'stage';
+    },
+  },
+  template: `
+    <div class="mr-widget-heading">
+      <div class="ci-widget">
+        <template v-if="hasCIError">
+          <div class="ci-status-icon ci-status-icon-failed js-ci-error">
+            <span class="js-icon-link icon-link">
+              <span
+                v-html="svg"
+                aria-hidden="true"></span>
+            </span>
+          </div>
+          <span>Could not connect to the CI server. Please check your settings and try again.</span>
+        </template>
+        <template v-else>
+          <pipeline-status-icon :pipelineStatus="mr.pipelineDetailedStatus" />
+          <span>
+            Pipeline
+            <a
+              :href="mr.pipeline.path"
+              class="pipeline-id">#{{mr.pipeline.id}}</a>
+            {{mr.pipeline.details.status.label}}
+            with {{stageText}}
+          </span>
+          <div class="mr-widget-pipeline-graph">
+            <div class="stage-cell">
+              <div
+                v-if="mr.pipeline.details.stages.length > 0"
+                v-for="stage in mr.pipeline.details.stages"
+                class="stage-container dropdown js-mini-pipeline-graph">
+                <pipeline-stage :stage="stage" />
+              </div>
+            </div>
+          </div>
+          <span>
+            for
+            <a
+              :href="mr.pipeline.commit.commit_path"
+              class="monospace js-commit-link">
+              {{mr.pipeline.commit.short_id}}</a>.
+          </span>
+          <span
+            v-if="mr.pipeline.coverage"
+            class="js-mr-coverage">
+            Coverage {{mr.pipeline.coverage}}%.
+          </span>
+        </template>
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_related_links.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_related_links.js
new file mode 100644
index 00000000000..205804670fa
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_related_links.js
@@ -0,0 +1,42 @@
+export default {
+  name: 'MRWidgetRelatedLinks',
+  props: {
+    relatedLinks: { type: Object, required: true },
+  },
+  computed: {
+    hasLinks() {
+      const { closing, mentioned, assignToMe } = this.relatedLinks;
+      return closing || mentioned || assignToMe;
+    },
+  },
+  methods: {
+    hasMultipleIssues(text) {
+      return !text ? false : text.match(/<\/a> and <a/);
+    },
+    issueLabel(field) {
+      return this.hasMultipleIssues(this.relatedLinks[field]) ? 'issues' : 'issue';
+    },
+    verbLabel(field) {
+      return this.hasMultipleIssues(this.relatedLinks[field]) ? 'are' : 'is';
+    },
+  },
+  template: `
+    <section
+      v-if="hasLinks"
+      class="mr-info-list mr-links">
+      <div class="legend"></div>
+      <p v-if="relatedLinks.closing">
+        Closes {{issueLabel('closing')}}
+        <span v-html="relatedLinks.closing"></span>.
+      </p>
+      <p v-if="relatedLinks.mentioned">
+        <span class="capitalize">{{issueLabel('mentioned')}}</span>
+        <span v-html="relatedLinks.mentioned"></span>
+        {{verbLabel('mentioned')}} mentioned but will not be closed.
+      </p>
+      <p v-if="relatedLinks.assignToMe">
+        <span v-html="relatedLinks.assignToMe"></span>
+      </p>
+    </section>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_archived.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_archived.js
new file mode 100644
index 00000000000..c7f25a1697c
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_archived.js
@@ -0,0 +1,16 @@
+export default {
+  name: 'MRWidgetArchived',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        This project is archived, write access has been disabled.
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_auto_merge_failed.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_auto_merge_failed.js
new file mode 100644
index 00000000000..fcccb17f58d
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_auto_merge_failed.js
@@ -0,0 +1,22 @@
+export default {
+  name: 'MRWidgetAutoMergeFailed',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        class="btn btn-success btn-small"
+        disabled="true"
+        type="button">
+        Merge
+      </button>
+      <span class="bold danger">
+        This merge request failed to be merged automatically.
+      </span>
+      <div class="merge-error-text">
+        {{mr.mergeError}}
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_checking.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_checking.js
new file mode 100644
index 00000000000..8515b54e62d
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_checking.js
@@ -0,0 +1,19 @@
+export default {
+  name: 'MRWidgetChecking',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        Checking ability to merge automatically.
+        <i
+          class="fa fa-spinner fa-spin"
+          aria-hidden="true" />
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_closed.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_closed.js
new file mode 100644
index 00000000000..7e66441e5ff
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_closed.js
@@ -0,0 +1,30 @@
+import mrWidgetAuthorTime from '../../components/mr_widget_author_time';
+
+export default {
+  name: 'MRWidgetClosed',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  components: {
+    'mr-widget-author-and-time': mrWidgetAuthorTime,
+  },
+  template: `
+    <div class="mr-widget-body">
+      <mr-widget-author-and-time
+        actionText="Closed by"
+        :author="mr.closedBy"
+        :dateTitle="mr.updatedAt"
+        :dateReadable="mr.closedAt"
+      />
+      <section>
+        <p>
+          The changes were not merged into
+          <a
+            :href="mr.targetBranchCommitsPath"
+            class="label-branch">
+            {{mr.targetBranch}}</a>.
+        </p>
+      </section>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_conflicts.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_conflicts.js
new file mode 100644
index 00000000000..36596c6f37e
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_conflicts.js
@@ -0,0 +1,39 @@
+export default {
+  name: 'MRWidgetConflicts',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        There are merge conflicts.
+        <span v-if="!mr.canMerge">
+          Resolve these conflicts or ask someone with write access to this repository to merge it locally.
+        </span>
+      </span>
+      <div
+        v-if="mr.canMerge"
+        class="btn-group">
+        <a
+          v-if="mr.conflictResolutionPath"
+          :href="mr.conflictResolutionPath"
+          class="btn btn-default btn-xs js-resolve-conflicts-button">
+          Resolve conflicts
+        </a>
+        <a
+          v-if="mr.canMerge"
+          class="btn btn-default btn-xs js-merge-locally-button"
+          data-toggle="modal"
+          href="#modal_merge_info">
+          Merge locally
+        </a>
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_failed_to_merge.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_failed_to_merge.js
new file mode 100644
index 00000000000..600b4d42e3d
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_failed_to_merge.js
@@ -0,0 +1,76 @@
+import eventHub from '../../event_hub';
+
+export default {
+  name: 'MRWidgetFailedToMerge',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  data() {
+    return {
+      timer: 10,
+      isRefreshing: false,
+    };
+  },
+  mounted() {
+    setInterval(() => {
+      this.updateTimer();
+    }, 1000);
+  },
+  created() {
+    eventHub.$emit('DisablePolling');
+  },
+  computed: {
+    timerText() {
+      return this.timer > 1 ? `${this.timer} seconds` : 'a second';
+    },
+  },
+  methods: {
+    refresh() {
+      this.isRefreshing = true;
+      eventHub.$emit('MRWidgetUpdateRequested');
+      eventHub.$emit('EnablePolling');
+    },
+    updateTimer() {
+      this.timer = this.timer - 1;
+
+      if (this.timer === 0) {
+        this.refresh();
+      }
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        class="btn btn-success btn-small"
+        disabled="true"
+        type="button">
+        Merge
+      </button>
+      <span
+        v-if="!isRefreshing"
+        class="bold danger">
+        <span
+          class="has-error-message"
+          v-if="mr.mergeError">
+          {{mr.mergeError}}
+        </span>
+        <span v-else>Merge failed.</span>
+        <span
+          :class="{ 'has-custom-error': mr.mergeError }">
+          Refreshing in {{timerText}} to show the updated status...
+        </span>
+        <button
+          @click="refresh"
+          class="btn btn-default btn-xs js-refresh-button"
+          type="button">
+          Refresh now
+        </button>
+      </span>
+      <span
+        v-if="isRefreshing"
+        class="bold js-refresh-label">
+        Refreshing now...
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_locked.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_locked.js
new file mode 100644
index 00000000000..e3c27dfb76d
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_locked.js
@@ -0,0 +1,24 @@
+export default {
+  name: 'MRWidgetLocked',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  template: `
+    <div class="mr-widget-body mr-state-locked">
+      <span class="state-label">Locked</span>
+      This merge request is in the process of being merged, during which time it is locked and cannot be closed.
+      <i
+        class="fa fa-spinner fa-spin"
+        aria-hidden="true" />
+      <section class="mr-info-list mr-links">
+        <div class="legend"></div>
+        <p>
+          The changes will be merged into
+          <span class="label-branch">
+            <a :href="mr.targetBranchPath">{{mr.targetBranch}}</a>
+          </span>
+        </p>
+      </section>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merge_when_pipeline_succeeds.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merge_when_pipeline_succeeds.js
new file mode 100644
index 00000000000..bcdbedcd46b
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merge_when_pipeline_succeeds.js
@@ -0,0 +1,116 @@
+/* global Flash */
+
+import MRWidgetAuthor from '../../components/mr_widget_author';
+import eventHub from '../../event_hub';
+
+export default {
+  name: 'MRWidgetMergeWhenPipelineSucceeds',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+  },
+  components: {
+    'mr-widget-author': MRWidgetAuthor,
+  },
+  data() {
+    return {
+      isCancellingAutoMerge: false,
+      isRemovingSourceBranch: false,
+    };
+  },
+  computed: {
+    canRemoveSourceBranch() {
+      const { shouldRemoveSourceBranch, canRemoveSourceBranch,
+        mergeUserId, currentUserId } = this.mr;
+
+      return !shouldRemoveSourceBranch && canRemoveSourceBranch && mergeUserId === currentUserId;
+    },
+  },
+  methods: {
+    cancelAutomaticMerge() {
+      this.isCancellingAutoMerge = true;
+      this.service.cancelAutomaticMerge()
+        .then(res => res.json())
+        .then((res) => {
+          eventHub.$emit('UpdateWidgetData', res);
+        })
+        .catch(() => {
+          this.isCancellingAutoMerge = false;
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+    removeSourceBranch() {
+      const options = {
+        sha: this.mr.sha,
+        merge_when_pipeline_succeeds: true,
+        should_remove_source_branch: true,
+      };
+
+      this.isRemovingSourceBranch = true;
+      this.service.mergeResource.save(options)
+        .then(res => res.json())
+        .then((res) => {
+          if (res.status === 'merge_when_pipeline_succeeds') {
+            eventHub.$emit('MRWidgetUpdateRequested');
+          }
+        })
+        .catch(() => {
+          this.isRemovingSourceBranch = false;
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <h4>
+        Set by
+        <mr-widget-author :author="mr.setToMWPSBy" />
+        to be merged automatically when the pipeline succeeds.
+        <a
+          v-if="mr.canCancelAutomaticMerge"
+          @click.prevent="cancelAutomaticMerge"
+          :disabled="isCancellingAutoMerge"
+          role="button"
+          href="#"
+          class="btn btn-xs btn-default js-cancel-auto-merge">
+          <i
+            v-if="isCancellingAutoMerge"
+            class="fa fa-spinner fa-spin"
+            aria-hidden="true" />
+            Cancel automatic merge
+        </a>
+      </h4>
+      <section class="mr-info-list">
+        <div class="legend"></div>
+        <p>The changes will be merged into
+          <a
+            :href="mr.targetBranchPath"
+            class="label-branch">
+            {{mr.targetBranch}}
+          </a>
+        </p>
+        <p v-if="mr.shouldRemoveSourceBranch">
+          The source branch will be removed.
+        </p>
+        <p
+          v-else
+          class="with-button">
+          The source branch will not be removed.
+          <a
+            v-if="canRemoveSourceBranch"
+            :disabled="isRemovingSourceBranch"
+            @click.prevent="removeSourceBranch"
+            role="button"
+            class="btn btn-xs btn-default js-remove-source-branch"
+            href="#">
+            <i
+            v-if="isRemovingSourceBranch"
+            class="fa fa-spinner fa-spin"
+            aria-hidden="true" />
+            Remove source branch
+          </a>
+        </p>
+      </section>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merged.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merged.js
new file mode 100644
index 00000000000..c7d32d18141
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merged.js
@@ -0,0 +1,130 @@
+/* global Flash */
+
+import mrWidgetAuthorTime from '../../components/mr_widget_author_time';
+import eventHub from '../../event_hub';
+
+export default {
+  name: 'MRWidgetMerged',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+  },
+  components: {
+    'mr-widget-author-and-time': mrWidgetAuthorTime,
+  },
+  data() {
+    return {
+      isMakingRequest: false,
+    };
+  },
+  computed: {
+    shouldShowRemoveSourceBranch() {
+      const { sourceBranchRemoved, isRemovingSourceBranch, canRemoveSourceBranch } = this.mr;
+
+      return !sourceBranchRemoved && canRemoveSourceBranch &&
+        !this.isMakingRequest && !isRemovingSourceBranch;
+    },
+    shouldShowSourceBranchRemoving() {
+      const { sourceBranchRemoved, isRemovingSourceBranch } = this.mr;
+      return !sourceBranchRemoved && (isRemovingSourceBranch || this.isMakingRequest);
+    },
+    shouldShowMergedButtons() {
+      const { canRevertInCurrentMR, canCherryPickInCurrentMR, revertInForkPath,
+        cherryPickInForkPath } = this.mr;
+
+      return canRevertInCurrentMR || canCherryPickInCurrentMR ||
+        revertInForkPath || cherryPickInForkPath;
+    },
+  },
+  methods: {
+    removeSourceBranch() {
+      this.isMakingRequest = true;
+      this.service.removeSourceBranch()
+        .then(res => res.json())
+        .then((res) => {
+          if (res.message === 'Branch was removed') {
+            eventHub.$emit('MRWidgetUpdateRequested', () => {
+              this.isMakingRequest = false;
+            });
+          }
+        })
+        .catch(() => {
+          this.isMakingRequest = false;
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <mr-widget-author-and-time
+        actionText="Merged by"
+        :author="mr.mergedBy"
+        :dateTitle="mr.updatedAt"
+        :dateReadable="mr.mergedAt" />
+      <section class="mr-info-list">
+        <div class="legend"></div>
+        <p>
+          The changes were merged into
+          <span class="label-branch">
+            <a :href="mr.targetBranchPath">{{mr.targetBranch}}</a>
+          </span>
+        </p>
+        <p v-if="mr.sourceBranchRemoved">The source branch has been removed.</p>
+        <p v-if="shouldShowRemoveSourceBranch">
+          You can remove source branch now.
+          <button
+            @click="removeSourceBranch"
+            :class="{ disabled: isMakingRequest }"
+            type="button"
+            class="btn btn-xs btn-default js-remove-branch-button">
+            Remove Source Branch
+          </button>
+        </p>
+        <p v-if="shouldShowSourceBranchRemoving">
+          <i
+            class="fa fa-spinner fa-spin"
+            aria-hidden="true" />
+          The source branch is being removed.
+        </p>
+      </section>
+      <div
+        v-if="shouldShowMergedButtons"
+        class="merged-buttons clearfix">
+        <a
+          v-if="mr.canRevertInCurrentMR"
+          class="btn btn-close btn-sm has-tooltip"
+          href="#modal-revert-commit"
+          data-toggle="modal"
+          data-container="body"
+          title="Revert this merge request in a new merge request">
+          Revert
+        </a>
+        <a
+          v-else-if="mr.revertInForkPath"
+          class="btn btn-close btn-sm has-tooltip"
+          data-method="post"
+          :href="mr.revertInForkPath"
+          title="Revert this merge request in a new merge request">
+          Revert
+        </a>
+        <a
+          v-if="mr.canCherryPickInCurrentMR"
+          class="btn btn-default btn-sm has-tooltip"
+          href="#modal-cherry-pick-commit"
+          data-toggle="modal"
+          data-container="body"
+          title="Cherry-pick this merge request in a new merge request">
+          Cherry-pick
+        </a>
+        <a
+          v-else-if="mr.cherryPickInForkPath"
+          class="btn btn-default btn-sm has-tooltip"
+          data-method="post"
+          :href="mr.cherryPickInForkPath"
+          title="Cherry-pick this merge request in a new merge request">
+          Cherry-pick
+        </a>
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_missing_branch.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_missing_branch.js
new file mode 100644
index 00000000000..328382485f6
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_missing_branch.js
@@ -0,0 +1,34 @@
+import mrWidgetMergeHelp from '../../components/mr_widget_merge_help';
+
+export default {
+  name: 'MRWidgetMissingBranch',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  components: {
+    'mr-widget-merge-help': mrWidgetMergeHelp,
+  },
+  computed: {
+    missingBranchName() {
+      return this.mr.sourceBranchRemoved ? 'source' : 'target';
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold js-branch-text">
+        <span class="capitalize">
+          {{missingBranchName}}
+        </span> branch does not exist.
+        Please restore the {{missingBranchName}} branch or use a different {{missingBranchName}} branch.
+      </span>
+      <mr-widget-merge-help
+        :missing-branch="missingBranchName" />
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_not_allowed.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_not_allowed.js
new file mode 100644
index 00000000000..07169b349be
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_not_allowed.js
@@ -0,0 +1,17 @@
+export default {
+  name: 'MRWidgetNotAllowed',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        Ready to be merged automatically.
+        Ask someone with write access to this repository to merge this request.
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_nothing_to_merge.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_nothing_to_merge.js
new file mode 100644
index 00000000000..8c4535f1337
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_nothing_to_merge.js
@@ -0,0 +1,17 @@
+export default {
+  name: 'MRWidgetNothingToMerge',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        There is nothing to merge from source branch into target branch.
+        Please push new commits or use a different branch.
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_blocked.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_blocked.js
new file mode 100644
index 00000000000..31c53b679ed
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_blocked.js
@@ -0,0 +1,16 @@
+export default {
+  name: 'MRWidgetPipelineBlocked',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        Pipeline blocked. The pipeline for this merge request requires a manual action to proceed.
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_failed.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_failed.js
new file mode 100644
index 00000000000..002820123ca
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_failed.js
@@ -0,0 +1,16 @@
+export default {
+  name: 'MRWidgetPipelineBlocked',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        class="btn btn-success btn-small"
+        disabled="true"
+        type="button">
+        Merge
+      </button>
+      <span class="bold">
+        The pipeline for this merge request failed. Please retry the job or push a new commit to fix the failure.
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_ready_to_merge.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_ready_to_merge.js
new file mode 100644
index 00000000000..ebcc03e531b
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_ready_to_merge.js
@@ -0,0 +1,309 @@
+/* global Flash */
+
+import successSvg from 'icons/_icon_status_success.svg';
+import warningSvg from 'icons/_icon_status_warning.svg';
+import simplePoll from '~/lib/utils/simple_poll';
+import eventHub from '../../event_hub';
+
+export default {
+  name: 'MRWidgetReadyToMerge',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+  },
+  data() {
+    return {
+      removeSourceBranch: true,
+      mergeWhenBuildSucceeds: false,
+      useCommitMessageWithDescription: false,
+      setToMergeWhenPipelineSucceeds: false,
+      showCommitMessageEditor: false,
+      isMakingRequest: false,
+      isMergingImmediately: false,
+      commitMessage: this.mr.commitMessage,
+      successSvg,
+      warningSvg,
+    };
+  },
+  computed: {
+    commitMessageLinkTitle() {
+      const withDesc = 'Include description in commit message';
+      const withoutDesc = "Don't include description in commit message";
+
+      return this.useCommitMessageWithDescription ? withoutDesc : withDesc;
+    },
+    mergeButtonClass() {
+      const defaultClass = 'btn btn-success accept-merge-request';
+      const failedClass = `${defaultClass} btn-danger`;
+      const inActionClass = `${defaultClass} btn-info`;
+      const { pipeline, isPipelineActive, isPipelineFailed, hasCI, ciStatus } = this.mr;
+
+      if (hasCI && !ciStatus) {
+        return failedClass;
+      } else if (!pipeline) {
+        return defaultClass;
+      } else if (isPipelineActive) {
+        return inActionClass;
+      } else if (isPipelineFailed) {
+        return failedClass;
+      }
+
+      return defaultClass;
+    },
+    mergeButtonText() {
+      if (this.isMergingImmediately) {
+        return 'Merge in progress';
+      } else if (this.mr.isPipelineActive) {
+        return 'Merge when pipeline succeeds';
+      }
+
+      return 'Merge';
+    },
+    shouldShowMergeOptionsDropdown() {
+      return this.mr.isPipelineActive && !this.mr.onlyAllowMergeIfPipelineSucceeds;
+    },
+    isMergeButtonDisabled() {
+      const { commitMessage } = this;
+      return Boolean(!commitMessage.length
+        || !this.isMergeAllowed()
+        || this.isMakingRequest
+        || this.mr.preventMerge);
+    },
+    shouldShowSquashBeforeMerge() {
+      const { commitsCount, enableSquashBeforeMerge } = this.mr;
+      return enableSquashBeforeMerge && commitsCount > 1;
+    },
+  },
+  methods: {
+    isMergeAllowed() {
+      return !(this.mr.onlyAllowMergeIfPipelineSucceeds && this.mr.isPipelineFailed);
+    },
+    updateCommitMessage() {
+      const cmwd = this.mr.commitMessageWithDescription;
+      this.useCommitMessageWithDescription = !this.useCommitMessageWithDescription;
+      this.commitMessage = this.useCommitMessageWithDescription ? cmwd : this.mr.commitMessage;
+    },
+    toggleCommitMessageEditor() {
+      this.showCommitMessageEditor = !this.showCommitMessageEditor;
+    },
+    handleMergeButtonClick(mergeWhenBuildSucceeds, mergeImmediately) {
+      // TODO: Remove no-param-reassign
+      if (mergeWhenBuildSucceeds === undefined) {
+        mergeWhenBuildSucceeds = this.mr.isPipelineActive; // eslint-disable-line no-param-reassign
+      } else if (mergeImmediately) {
+        this.isMergingImmediately = true;
+      }
+
+      this.setToMergeWhenPipelineSucceeds = mergeWhenBuildSucceeds === true;
+
+      const options = {
+        sha: this.mr.sha,
+        commit_message: this.commitMessage,
+        merge_when_pipeline_succeeds: this.setToMergeWhenPipelineSucceeds,
+        should_remove_source_branch: this.removeSourceBranch === true,
+      };
+
+      // Only truthy in EE extension of this component
+      if (this.setAdditionalParams) {
+        this.setAdditionalParams(options);
+      }
+
+      this.isMakingRequest = true;
+      this.service.merge(options)
+        .then(res => res.json())
+        .then((res) => {
+          const hasError = res.status === 'failed' || res.status === 'hook_validation_error';
+
+          if (res.status === 'merge_when_pipeline_succeeds') {
+            eventHub.$emit('MRWidgetUpdateRequested');
+          } else if (res.status === 'success') {
+            this.initiateMergePolling();
+          } else if (hasError) {
+            eventHub.$emit('FailedToMerge', res.merge_error);
+          }
+        })
+        .catch(() => {
+          this.isMakingRequest = false;
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+    initiateMergePolling() {
+      simplePoll((continuePolling, stopPolling) => {
+        this.handleMergePolling(continuePolling, stopPolling);
+      });
+    },
+    handleMergePolling(continuePolling, stopPolling) {
+      this.service.poll()
+        .then(res => res.json())
+        .then((res) => {
+          if (res.state === 'merged') {
+            // If state is merged we should update the widget and stop the polling
+            eventHub.$emit('MRWidgetUpdateRequested');
+            eventHub.$emit('FetchActionsContent');
+            if (window.mergeRequest) {
+              window.mergeRequest.updateStatusText('status-box-open', 'status-box-merged', 'Merged');
+              window.mergeRequest.decreaseCounter();
+            }
+            stopPolling();
+
+            // If user checked remove source branch and we didn't remove the branch yet
+            // we should start another polling for source branch remove process
+            if (this.removeSourceBranch && res.source_branch_exists) {
+              this.initiateRemoveSourceBranchPolling();
+            }
+          } else if (res.merge_error) {
+            eventHub.$emit('FailedToMerge', res.merge_error);
+            stopPolling();
+          } else {
+            // MR is not merged yet, continue polling until the state becomes 'merged'
+            continuePolling();
+          }
+        })
+        .catch(() => {
+          new Flash('Something went wrong while merging this merge request. Please try again.'); // eslint-disable-line
+        });
+    },
+    initiateRemoveSourceBranchPolling() {
+      // We need to show source branch is being removed spinner in another component
+      eventHub.$emit('SetBranchRemoveFlag', [true]);
+
+      simplePoll((continuePolling, stopPolling) => {
+        this.handleRemoveBranchPolling(continuePolling, stopPolling);
+      });
+    },
+    handleRemoveBranchPolling(continuePolling, stopPolling) {
+      this.service.poll()
+        .then(res => res.json())
+        .then((res) => {
+          // If source branch exists then we should continue polling
+          // because removing a source branch is a background task and takes time
+          if (res.source_branch_exists) {
+            continuePolling();
+          } else {
+            // Branch is removed. Update widget, stop polling and hide the spinner
+            eventHub.$emit('MRWidgetUpdateRequested', () => {
+              eventHub.$emit('SetBranchRemoveFlag', [false]);
+            });
+            stopPolling();
+          }
+        })
+        .catch(() => {
+          new Flash('Something went wrong while removing the source branch. Please try again.'); // eslint-disable-line
+        });
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <span class="btn-group">
+        <button
+          @click="handleMergeButtonClick()"
+          :disabled="isMergeButtonDisabled"
+          :class="mergeButtonClass"
+          type="button">
+          <i
+            v-if="isMakingRequest"
+            class="fa fa-spinner fa-spin"
+            aria-hidden="true" />
+          {{mergeButtonText}}
+        </button>
+        <button
+          v-if="shouldShowMergeOptionsDropdown"
+          :disabled="isMergeButtonDisabled"
+          type="button"
+          class="btn btn-info dropdown-toggle"
+          data-toggle="dropdown">
+          <i
+            class="fa fa-caret-down"
+            aria-hidden="true" />
+          <span class="sr-only">
+            Select merge moment
+          </span>
+        </button>
+        <ul
+          v-if="shouldShowMergeOptionsDropdown"
+          class="dropdown-menu dropdown-menu-right"
+          role="menu">
+          <li>
+            <a
+              @click.prevent="handleMergeButtonClick(true)"
+              class="merge_when_pipeline_succeeds"
+              href="#">
+              <span
+                v-html="successSvg"
+                class="merge-opt-icon"
+                aria-hidden="true"></span>
+              <span class="merge-opt-title">Merge when pipeline succeeds</span>
+            </a>
+          </li>
+          <li>
+            <a
+              @click.prevent="handleMergeButtonClick(false, true)"
+              class="accept-merge-request"
+              href="#">
+              <span
+                v-html="warningSvg"
+                class="merge-opt-icon"
+                aria-hidden="true"></span>
+              <span class="merge-opt-title">Merge immediately</span>
+            </a>
+          </li>
+        </ul>
+      </span>
+      <template v-if="isMergeAllowed()">
+        <label class="spacing">
+          <input
+            v-model="removeSourceBranch"
+            :disabled="isMergeButtonDisabled"
+            type="checkbox"/> Remove source branch
+        </label>
+
+        <!-- Placeholder for EE extension of this component -->
+        <squash-before-merge
+          v-if="shouldShowSquashBeforeMerge"
+          :mr="mr"
+          :is-merge-button-disabled="isMergeButtonDisabled" />
+
+        <button
+          @click="toggleCommitMessageEditor"
+          :disabled="isMergeButtonDisabled"
+          class="btn btn-default btn-xs"
+          type="button">
+          Modify commit message
+        </button>
+        <div
+          v-if="showCommitMessageEditor"
+          class="prepend-top-default commit-message-editor">
+          <div class="form-group clearfix">
+            <label
+              class="control-label"
+              for="commit-message">
+              Commit message
+            </label>
+            <div class="col-sm-10">
+              <div class="commit-message-container">
+                <div class="max-width-marker"></div>
+                <textarea
+                  v-model="commitMessage"
+                  class="form-control js-commit-message"
+                  required="required"
+                  rows="14"
+                  name="Commit message"></textarea>
+              </div>
+              <p class="hint">Try to keep the first line under 52 characters and the others under 72.</p>
+              <div class="hint">
+                <a
+                  @click.prevent="updateCommitMessage"
+                  href="#">{{commitMessageLinkTitle}}</a>
+              </div>
+            </div>
+          </div>
+        </div>
+      </template>
+      <template v-else>
+        <span class="bold">
+          The pipeline for this merge request failed. Please retry the job or push a new commit to fix the failure.
+        </span>
+      </template>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_squash_before_merge.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_squash_before_merge.js
new file mode 100644
index 00000000000..bf8628d18a6
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_squash_before_merge.js
@@ -0,0 +1,15 @@
+/*
+The squash-before-merge button is EE only, but it's located right in the middle
+of the readyToMerge state component template.
+
+If we didn't declare this component in CE, we'd need to maintain a separate copy
+of the readyToMergeState template in EE, which is pretty big and likely to change.
+
+Instead, in CE, we declare the component, but it's hidden and is configured to do nothing.
+In EE, the configuration extends this object to add a functioning squash-before-merge
+button.
+*/
+
+export default {
+  template: '',
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_unresolved_discussions.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_unresolved_discussions.js
new file mode 100644
index 00000000000..f4ab2d9fa58
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_unresolved_discussions.js
@@ -0,0 +1,27 @@
+export default {
+  name: 'MRWidgetUnresolvedDiscussions',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        There are unresolved discussions. Please resolve these discussions
+        <span v-if="mr.canCreateIssue">or</span>
+        <span v-else>.</span>
+      </span>
+      <a
+        v-if="mr.createIssueToResolveDiscussionsPath"
+        :href="mr.createIssueToResolveDiscussionsPath"
+        class="btn btn-default btn-xs js-create-issue">
+        Create an issue to resolve them later
+      </a>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_wip.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_wip.js
new file mode 100644
index 00000000000..cb02ffe93bd
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_wip.js
@@ -0,0 +1,59 @@
+/* global Flash */
+import eventHub from '../../event_hub';
+
+export default {
+  name: 'MRWidgetWIP',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+  },
+  data() {
+    return {
+      isMakingRequest: false,
+    };
+  },
+  methods: {
+    removeWIP() {
+      this.isMakingRequest = true;
+      this.service.removeWIP()
+        .then(res => res.json())
+        .then((res) => {
+          eventHub.$emit('UpdateWidgetData', res);
+          new Flash('The merge request can now be merged.', 'notice'); // eslint-disable-line
+          $('.merge-request .detail-page-description .title').text(this.mr.title);
+        })
+        .catch(() => {
+          this.isMakingRequest = false;
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge</button>
+      <span class="bold">
+        This merge request is currently Work In Progress and therefore unable to merge
+      </span>
+      <template v-if="mr.removeWIPPath">
+        <i
+          class="fa fa-question-circle has-tooltip"
+          title="When this merge request is ready, remove the WIP: prefix from the title to allow it to be merged." />
+        <button
+          @click="removeWIP"
+          :disabled="isMakingRequest"
+          type="button"
+          class="btn btn-default btn-xs js-remove-wip">
+          <i
+            v-if="isMakingRequest"
+            class="fa fa-spinner fa-spin"
+            aria-hidden="true" />
+            Resolve WIP status
+        </button>
+      </template>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/dependencies.js b/app/assets/javascripts/vue_merge_request_widget/dependencies.js
new file mode 100644
index 00000000000..b2eb32ead5f
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/dependencies.js
@@ -0,0 +1,42 @@
+/**
+ * This file is the centerpiece of an attempt to reduce potential conflicts
+ * between the CE and EE versions of the MR widget. EE additions to the MR widget should
+ * be contained in the ./vue_merge_request_widget/ee directory, and should **extend**
+ * rather than mutate CE MR Widget code.
+ *
+ * This file should be the only source of conflicts between EE and CE. EE-only components should
+ * imported directly where they are needed, and import paths for EE extensions of CE components
+ * should overwrite import paths **without** changing the order of dependencies listed here.
+ */
+
+export { default as Vue } from 'vue';
+export { default as SmartInterval } from '~/smart_interval';
+export { default as WidgetHeader } from './components/mr_widget_header';
+export { default as WidgetMergeHelp } from './components/mr_widget_merge_help';
+export { default as WidgetPipeline } from './components/mr_widget_pipeline';
+export { default as WidgetDeployment } from './components/mr_widget_deployment';
+export { default as WidgetRelatedLinks } from './components/mr_widget_related_links';
+export { default as MergedState } from './components/states/mr_widget_merged';
+export { default as FailedToMerge } from './components/states/mr_widget_failed_to_merge';
+export { default as ClosedState } from './components/states/mr_widget_closed';
+export { default as LockedState } from './components/states/mr_widget_locked';
+export { default as WipState } from './components/states/mr_widget_wip';
+export { default as ArchivedState } from './components/states/mr_widget_archived';
+export { default as ConflictsState } from './components/states/mr_widget_conflicts';
+export { default as NothingToMergeState } from './components/states/mr_widget_nothing_to_merge';
+export { default as MissingBranchState } from './components/states/mr_widget_missing_branch';
+export { default as NotAllowedState } from './components/states/mr_widget_not_allowed';
+export { default as ReadyToMergeState } from './components/states/mr_widget_ready_to_merge';
+export { default as UnresolvedDiscussionsState } from './components/states/mr_widget_unresolved_discussions';
+export { default as PipelineBlockedState } from './components/states/mr_widget_pipeline_blocked';
+export { default as PipelineFailedState } from './components/states/mr_widget_pipeline_failed';
+export { default as MergeWhenPipelineSucceedsState } from './components/states/mr_widget_merge_when_pipeline_succeeds';
+export { default as AutoMergeFailed } from './components/states/mr_widget_auto_merge_failed';
+export { default as CheckingState } from './components/states/mr_widget_checking';
+export { default as MRWidgetStore } from './stores/mr_widget_store';
+export { default as MRWidgetService } from './services/mr_widget_service';
+export { default as eventHub } from './event_hub';
+export { default as getStateKey } from './stores/get_state_key';
+export { default as mrWidgetOptions } from './mr_widget_options';
+export { default as stateMaps } from './stores/state_maps';
+export { default as SquashBeforeMerge } from './components/states/mr_widget_squash_before_merge';
diff --git a/app/assets/javascripts/vue_merge_request_widget/event_hub.js b/app/assets/javascripts/vue_merge_request_widget/event_hub.js
new file mode 100644
index 00000000000..0948c2e5352
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/event_hub.js
@@ -0,0 +1,3 @@
+import Vue from 'vue';
+
+export default new Vue();
diff --git a/app/assets/javascripts/vue_merge_request_widget/index.js b/app/assets/javascripts/vue_merge_request_widget/index.js
new file mode 100644
index 00000000000..cd65ac069c5
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/index.js
@@ -0,0 +1,12 @@
+import {
+  Vue,
+  mrWidgetOptions,
+} from './dependencies';
+
+document.addEventListener('DOMContentLoaded', () => {
+  const vm = new Vue(mrWidgetOptions);
+
+  window.gl.mrWidget = {
+    checkStatus: vm.checkStatus,
+  };
+});
diff --git a/app/assets/javascripts/vue_merge_request_widget/mr_widget_options.js b/app/assets/javascripts/vue_merge_request_widget/mr_widget_options.js
new file mode 100644
index 00000000000..7c6c2d21714
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/mr_widget_options.js
@@ -0,0 +1,234 @@
+/* global Flash */
+
+import {
+  WidgetHeader,
+  WidgetMergeHelp,
+  WidgetPipeline,
+  WidgetDeployment,
+  WidgetRelatedLinks,
+  MergedState,
+  ClosedState,
+  LockedState,
+  WipState,
+  ArchivedState,
+  ConflictsState,
+  NothingToMergeState,
+  MissingBranchState,
+  NotAllowedState,
+  ReadyToMergeState,
+  UnresolvedDiscussionsState,
+  PipelineBlockedState,
+  PipelineFailedState,
+  FailedToMerge,
+  MergeWhenPipelineSucceedsState,
+  AutoMergeFailed,
+  CheckingState,
+  MRWidgetStore,
+  MRWidgetService,
+  eventHub,
+  stateMaps,
+  SquashBeforeMerge,
+} from './dependencies';
+
+export default {
+  el: '#js-vue-mr-widget',
+  name: 'MRWidget',
+  data() {
+    const store = new MRWidgetStore(gl.mrWidgetData);
+    const service = this.createService(store);
+    return {
+      mr: store,
+      service,
+    };
+  },
+  computed: {
+    componentName() {
+      return stateMaps.stateToComponentMap[this.mr.state];
+    },
+    shouldRenderMergeHelp() {
+      return stateMaps.statesToShowHelpWidget.indexOf(this.mr.state) > -1;
+    },
+    shouldRenderPipelines() {
+      return Object.keys(this.mr.pipeline).length || this.mr.hasCI;
+    },
+    shouldRenderRelatedLinks() {
+      return this.mr.relatedLinks;
+    },
+    shouldRenderDeployments() {
+      return this.mr.deployments.length;
+    },
+  },
+  methods: {
+    createService(store) {
+      const endpoints = {
+        mergePath: store.mergePath,
+        mergeCheckPath: store.mergeCheckPath,
+        cancelAutoMergePath: store.cancelAutoMergePath,
+        removeWIPPath: store.removeWIPPath,
+        sourceBranchPath: store.sourceBranchPath,
+        ciEnvironmentsStatusPath: store.ciEnvironmentsStatusPath,
+        statusPath: store.statusPath,
+        mergeActionsContentPath: store.mergeActionsContentPath,
+      };
+      return new MRWidgetService(endpoints);
+    },
+    checkStatus(cb) {
+      this.service.checkStatus()
+        .then(res => res.json())
+        .then((res) => {
+          this.mr.setData(res);
+          this.setFavicon();
+          if (cb) {
+            cb.call(null, res);
+          }
+        })
+        .catch(() => {
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+    initPolling() {
+      this.pollingInterval = new gl.SmartInterval({
+        callback: this.checkStatus,
+        startingInterval: 10000,
+        maxInterval: 30000,
+        hiddenInterval: 120000,
+        incrementByFactorOf: 5000,
+      });
+    },
+    initDeploymentsPolling() {
+      this.deploymentsInterval = new gl.SmartInterval({
+        callback: this.fetchDeployments,
+        startingInterval: 30000,
+        maxInterval: 120000,
+        hiddenInterval: 240000,
+        incrementByFactorOf: 15000,
+        immediateExecution: true,
+      });
+    },
+    setFavicon() {
+      if (this.mr.ciStatusFaviconPath) {
+        gl.utils.setFavicon(this.mr.ciStatusFaviconPath);
+      }
+    },
+    fetchDeployments() {
+      this.service.fetchDeployments()
+        .then(res => res.json())
+        .then((res) => {
+          if (res.length) {
+            this.mr.deployments = res;
+          }
+        })
+        .catch(() => {
+          new Flash('Something went wrong while fetching the environments for this merge request. Please try again.'); // eslint-disable-line
+        });
+    },
+    fetchActionsContent() {
+      this.service.fetchMergeActionsContent()
+        .then((res) => {
+          if (res.body) {
+            const el = document.createElement('div');
+            el.innerHTML = res.body;
+            document.body.appendChild(el);
+          }
+        })
+        .catch(() => {
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+    resumePolling() {
+      this.pollingInterval.resume();
+    },
+    stopPolling() {
+      this.pollingInterval.stopTimer();
+    },
+    bindEventHubListeners() {
+      eventHub.$on('MRWidgetUpdateRequested', (cb) => {
+        this.checkStatus(cb);
+      });
+
+      // `params` should be an Array contains a Boolean, like `[true]`
+      // Passing parameter as Boolean didn't work.
+      eventHub.$on('SetBranchRemoveFlag', (params) => {
+        this.mr.isRemovingSourceBranch = params[0];
+      });
+
+      eventHub.$on('FailedToMerge', (mergeError) => {
+        this.mr.state = 'failedToMerge';
+        this.mr.mergeError = mergeError;
+      });
+
+      eventHub.$on('UpdateWidgetData', (data) => {
+        this.mr.setData(data);
+      });
+
+      eventHub.$on('FetchActionsContent', () => {
+        this.fetchActionsContent();
+      });
+
+      eventHub.$on('EnablePolling', () => {
+        this.resumePolling();
+      });
+
+      eventHub.$on('DisablePolling', () => {
+        this.stopPolling();
+      });
+    },
+    handleMounted() {
+      this.checkStatus();
+      this.setFavicon();
+      this.initDeploymentsPolling();
+    },
+  },
+  created() {
+    this.initPolling();
+    this.bindEventHubListeners();
+  },
+  mounted() {
+    this.handleMounted();
+  },
+  components: {
+    'mr-widget-header': WidgetHeader,
+    'mr-widget-merge-help': WidgetMergeHelp,
+    'mr-widget-pipeline': WidgetPipeline,
+    'mr-widget-deployment': WidgetDeployment,
+    'mr-widget-related-links': WidgetRelatedLinks,
+    'mr-widget-merged': MergedState,
+    'mr-widget-closed': ClosedState,
+    'mr-widget-locked': LockedState,
+    'mr-widget-failed-to-merge': FailedToMerge,
+    'mr-widget-wip': WipState,
+    'mr-widget-archived': ArchivedState,
+    'mr-widget-conflicts': ConflictsState,
+    'mr-widget-nothing-to-merge': NothingToMergeState,
+    'mr-widget-not-allowed': NotAllowedState,
+    'mr-widget-missing-branch': MissingBranchState,
+    'mr-widget-ready-to-merge': ReadyToMergeState,
+    'mr-widget-squash-before-merge': SquashBeforeMerge,
+    'mr-widget-checking': CheckingState,
+    'mr-widget-unresolved-discussions': UnresolvedDiscussionsState,
+    'mr-widget-pipeline-blocked': PipelineBlockedState,
+    'mr-widget-pipeline-failed': PipelineFailedState,
+    'mr-widget-merge-when-pipeline-succeeds': MergeWhenPipelineSucceedsState,
+    'mr-widget-auto-merge-failed': AutoMergeFailed,
+  },
+  template: `
+    <div class="mr-state-widget prepend-top-default">
+      <mr-widget-header :mr="mr" />
+      <mr-widget-pipeline
+        v-if="shouldRenderPipelines"
+        :mr="mr" />
+      <mr-widget-deployment
+        v-if="shouldRenderDeployments"
+        :mr="mr"
+        :service="service" />
+      <component
+        :is="componentName"
+        :mr="mr"
+        :service="service" />
+      <mr-widget-related-links
+        v-if="shouldRenderRelatedLinks"
+        :related-links="mr.relatedLinks" />
+      <mr-widget-merge-help v-if="shouldRenderMergeHelp" />
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/services/mr_widget_service.js b/app/assets/javascripts/vue_merge_request_widget/services/mr_widget_service.js
new file mode 100644
index 00000000000..42493be3372
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/services/mr_widget_service.js
@@ -0,0 +1,57 @@
+import Vue from 'vue';
+import VueResource from 'vue-resource';
+
+Vue.use(VueResource);
+
+export default class MRWidgetService {
+  constructor(endpoints) {
+    this.mergeResource = Vue.resource(endpoints.mergePath);
+    this.mergeCheckResource = Vue.resource(endpoints.mergeCheckPath);
+    this.cancelAutoMergeResource = Vue.resource(endpoints.cancelAutoMergePath);
+    this.removeWIPResource = Vue.resource(endpoints.removeWIPPath);
+    this.removeSourceBranchResource = Vue.resource(endpoints.sourceBranchPath);
+    this.deploymentsResource = Vue.resource(endpoints.ciEnvironmentsStatusPath);
+    this.pollResource = Vue.resource(`${endpoints.statusPath}?basic=true`);
+    this.mergeActionsContentResource = Vue.resource(endpoints.mergeActionsContentPath);
+  }
+
+  merge(data) {
+    return this.mergeResource.save(data);
+  }
+
+  cancelAutomaticMerge() {
+    return this.cancelAutoMergeResource.save();
+  }
+
+  removeWIP() {
+    return this.removeWIPResource.save();
+  }
+
+  removeSourceBranch() {
+    return this.removeSourceBranchResource.delete();
+  }
+
+  fetchDeployments() {
+    return this.deploymentsResource.get();
+  }
+
+  poll() {
+    return this.pollResource.get();
+  }
+
+  checkStatus() {
+    return this.mergeCheckResource.get();
+  }
+
+  fetchMergeActionsContent() {
+    return this.mergeActionsContentResource.get();
+  }
+
+  static stopEnvironment(url) {
+    return Vue.http.post(url);
+  }
+
+  static fetchMetrics(metricsUrl) {
+    return Vue.http.get(`${metricsUrl}.json`);
+  }
+}
diff --git a/app/assets/javascripts/vue_merge_request_widget/stores/get_state_key.js b/app/assets/javascripts/vue_merge_request_widget/stores/get_state_key.js
new file mode 100644
index 00000000000..fee4113f3c8
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/stores/get_state_key.js
@@ -0,0 +1,28 @@
+export default function deviseState(data) {
+  if (data.project_archived) {
+    return 'archived';
+  } else if (data.branch_missing) {
+    return 'missingBranch';
+  } else if (!data.commits_count) {
+    return 'nothingToMerge';
+  } else if (this.mergeStatus === 'unchecked') {
+    return 'checking';
+  } else if (data.has_conflicts) {
+    return 'conflicts';
+  } else if (data.work_in_progress) {
+    return 'workInProgress';
+  } else if (this.mergeWhenPipelineSucceeds) {
+    return this.mergeError ? 'autoMergeFailed' : 'mergeWhenPipelineSucceeds';
+  } else if (!this.canMerge) {
+    return 'notAllowedToMerge';
+  } else if (this.onlyAllowMergeIfPipelineSucceeds && this.isPipelineFailed) {
+    return 'pipelineFailed';
+  } else if (this.hasMergeableDiscussionsState) {
+    return 'unresolvedDiscussions';
+  } else if (this.isPipelineBlocked) {
+    return 'pipelineBlocked';
+  } else if (this.canBeMerged) {
+    return 'readyToMerge';
+  }
+  return null;
+}
diff --git a/app/assets/javascripts/vue_merge_request_widget/stores/mr_widget_store.js b/app/assets/javascripts/vue_merge_request_widget/stores/mr_widget_store.js
new file mode 100644
index 00000000000..faafeae5c5b
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/stores/mr_widget_store.js
@@ -0,0 +1,134 @@
+import Timeago from 'timeago.js';
+import { getStateKey } from '../dependencies';
+
+export default class MergeRequestStore {
+
+  constructor(data) {
+    this.setData(data);
+  }
+
+  setData(data) {
+    const currentUser = data.current_user;
+    const pipelineStatus = data.pipeline ? data.pipeline.details.status : null;
+
+    this.title = data.title;
+    this.targetBranch = data.target_branch;
+    this.sourceBranch = data.source_branch;
+    this.mergeStatus = data.merge_status;
+    this.sha = data.diff_head_sha;
+    this.commitMessage = data.merge_commit_message;
+    this.commitMessageWithDescription = data.merge_commit_message_with_description;
+    this.commitsCount = data.commits_count;
+    this.divergedCommitsCount = data.diverged_commits_count;
+    this.pipeline = data.pipeline || {};
+    this.deployments = this.deployments || data.deployments || [];
+
+    if (data.issues_links) {
+      const links = data.issues_links;
+      const { closing } = links;
+      const mentioned = links.mentioned_but_not_closing;
+      const assignToMe = links.assign_to_closing;
+
+      if (closing || mentioned || assignToMe) {
+        this.relatedLinks = { closing, mentioned, assignToMe };
+      }
+    }
+
+    this.updatedAt = data.updated_at;
+    this.mergedAt = MergeRequestStore.getEventDate(data.merge_event);
+    this.closedAt = MergeRequestStore.getEventDate(data.closed_event);
+    this.mergedBy = MergeRequestStore.getAuthorObject(data.merge_event);
+    this.closedBy = MergeRequestStore.getAuthorObject(data.closed_event);
+    this.setToMWPSBy = MergeRequestStore.getAuthorObject({ author: data.merge_user || {} });
+    this.mergeUserId = data.merge_user_id;
+    this.currentUserId = gon.current_user_id;
+    this.sourceBranchPath = data.source_branch_path;
+    this.sourceBranchLink = data.source_branch_with_namespace_link;
+    this.mergeError = data.merge_error;
+    this.targetBranchPath = data.target_branch_commits_path;
+    this.conflictResolutionPath = data.conflict_resolution_path;
+    this.cancelAutoMergePath = data.cancel_merge_when_pipeline_succeeds_path;
+    this.removeWIPPath = data.remove_wip_path;
+    this.sourceBranchRemoved = !data.source_branch_exists;
+    this.shouldRemoveSourceBranch = (data.merge_params || {}).should_remove_source_branch || false;
+    this.onlyAllowMergeIfPipelineSucceeds = data.only_allow_merge_if_pipeline_succeeds || false;
+    this.mergeWhenPipelineSucceeds = data.merge_when_pipeline_succeeds || false;
+    this.mergePath = data.merge_path;
+    this.statusPath = data.status_path;
+    this.emailPatchesPath = data.email_patches_path;
+    this.plainDiffPath = data.plain_diff_path;
+    this.createIssueToResolveDiscussionsPath = data.create_issue_to_resolve_discussions_path;
+    this.mergeCheckPath = data.merge_check_path;
+    this.mergeActionsContentPath = data.commit_change_content_path;
+    this.isRemovingSourceBranch = this.isRemovingSourceBranch || false;
+    this.isOpen = data.state === 'opened' || data.state === 'reopened' || false;
+    this.hasMergeableDiscussionsState = data.mergeable_discussions_state === false;
+    this.canRemoveSourceBranch = currentUser.can_remove_source_branch || false;
+    this.canMerge = !!data.merge_path;
+    this.canCreateIssue = currentUser.can_create_issue || false;
+    this.canCancelAutomaticMerge = !!data.cancel_merge_when_pipeline_succeeds_path;
+    this.canBeMerged = data.can_be_merged || false;
+
+    // Cherry-pick and Revert actions related
+    this.canCherryPickInCurrentMR = currentUser.can_cherry_pick_on_current_merge_request || false;
+    this.canRevertInCurrentMR = currentUser.can_revert_on_current_merge_request || false;
+    this.cherryPickInForkPath = currentUser.cherry_pick_in_fork_path;
+    this.revertInForkPath = currentUser.revert_in_fork_path;
+
+    // CI related
+    this.ciEnvironmentsStatusPath = data.ci_environments_status_path;
+    this.hasCI = data.has_ci;
+    this.ciStatus = data.ci_status;
+    this.isPipelineFailed = this.ciStatus ? (this.ciStatus === 'failed' || this.ciStatus === 'canceled') : false;
+    this.pipelineDetailedStatus = pipelineStatus;
+    this.isPipelineActive = data.pipeline ? data.pipeline.active : false;
+    this.isPipelineBlocked = pipelineStatus ? pipelineStatus.group === 'manual' : false;
+    this.ciStatusFaviconPath = pipelineStatus ? pipelineStatus.favicon : null;
+
+    this.setState(data);
+  }
+
+  setState(data) {
+    if (this.isOpen) {
+      this.state = getStateKey.call(this, data);
+    } else {
+      switch (data.state) {
+        case 'merged':
+          this.state = 'merged';
+          break;
+        case 'closed':
+          this.state = 'closed';
+          break;
+        case 'locked':
+          this.state = 'locked';
+          break;
+        default:
+          this.state = null;
+      }
+    }
+  }
+
+  static getAuthorObject(event) {
+    if (!event) {
+      return {};
+    }
+
+    return {
+      name: event.author.name || '',
+      username: event.author.username || '',
+      webUrl: event.author.web_url || '',
+      avatarUrl: event.author.avatar_url || '',
+    };
+  }
+
+  static getEventDate(event) {
+    const timeagoInstance = new Timeago();
+
+    if (!event) {
+      return '';
+    }
+
+    return timeagoInstance.format(event.updated_at);
+  }
+
+}
diff --git a/app/assets/javascripts/vue_merge_request_widget/stores/state_maps.js b/app/assets/javascripts/vue_merge_request_widget/stores/state_maps.js
new file mode 100644
index 00000000000..625d7a01c65
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/stores/state_maps.js
@@ -0,0 +1,36 @@
+const stateToComponentMap = {
+  merged: 'mr-widget-merged',
+  closed: 'mr-widget-closed',
+  locked: 'mr-widget-locked',
+  conflicts: 'mr-widget-conflicts',
+  missingBranch: 'mr-widget-missing-branch',
+  workInProgress: 'mr-widget-wip',
+  readyToMerge: 'mr-widget-ready-to-merge',
+  nothingToMerge: 'mr-widget-nothing-to-merge',
+  notAllowedToMerge: 'mr-widget-not-allowed',
+  archived: 'mr-widget-archived',
+  checking: 'mr-widget-checking',
+  unresolvedDiscussions: 'mr-widget-unresolved-discussions',
+  pipelineBlocked: 'mr-widget-pipeline-blocked',
+  pipelineFailed: 'mr-widget-pipeline-failed',
+  mergeWhenPipelineSucceeds: 'mr-widget-merge-when-pipeline-succeeds',
+  failedToMerge: 'mr-widget-failed-to-merge',
+  autoMergeFailed: 'mr-widget-auto-merge-failed',
+};
+
+const statesToShowHelpWidget = [
+  'locked',
+  'conflicts',
+  'workInProgress',
+  'readyToMerge',
+  'checking',
+  'unresolvedDiscussions',
+  'pipelineFailed',
+  'pipelineBlocked',
+  'autoMergeFailed',
+];
+
+export default {
+  stateToComponentMap,
+  statesToShowHelpWidget,
+};
diff --git a/app/assets/javascripts/vue_shared/components/memory_graph.js b/app/assets/javascripts/vue_shared/components/memory_graph.js
new file mode 100644
index 00000000000..2a605b24339
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/memory_graph.js
@@ -0,0 +1,36 @@
+export default {
+  name: 'MemoryGraph',
+  props: {
+    metrics: { type: Array, required: true },
+    width: { type: String, required: true },
+    height: { type: String, required: true },
+  },
+  data() {
+    return {
+      pathD: '',
+      pathViewBox: '',
+      // dotX: '',
+      // dotY: '',
+    };
+  },
+  mounted() {
+    const renderData = this.$props.metrics.map(v => v[1]);
+    const maxMemory = Math.max.apply(null, renderData);
+    const minMemory = Math.min.apply(null, renderData);
+    const diff = maxMemory - minMemory;
+    // const cx = 0;
+    // const cy = 0;
+    const lineWidth = renderData.length;
+    const linePath = renderData.map((y, x) => `${x} ${maxMemory - y}`);
+    this.pathD = `M ${linePath}`;
+    this.pathViewBox = `0 0 ${lineWidth} ${diff}`;
+  },
+  template: `
+    <div class="memory-graph-container">
+      <svg :width="width" :height="height" xmlns="http://www.w3.org/2000/svg">
+        <path :d="pathD" :viewBox="pathViewBox" />
+        <!--<circle r="0.8" :cx="dotX" :cy="dotY" tranform="translate(0 -1)" /> -->
+      </svg>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_shared/components/pipeline_status_icon.js b/app/assets/javascripts/vue_shared/components/pipeline_status_icon.js
new file mode 100644
index 00000000000..ae246ada01b
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/pipeline_status_icon.js
@@ -0,0 +1,23 @@
+import { statusClassToSvgMap } from '../pipeline_svg_icons';
+
+export default {
+  name: 'PipelineStatusIcon',
+  props: {
+    pipelineStatus: { type: Object, required: true, default: () => ({}) },
+  },
+  computed: {
+    svg() {
+      return statusClassToSvgMap[this.pipelineStatus.icon];
+    },
+    statusClass() {
+      return `ci-status-icon ci-status-icon-${this.pipelineStatus.group}`;
+    },
+  },
+  template: `
+    <div :class="statusClass">
+      <a class="icon-link" :href="pipelineStatus.details_path">
+        <span v-html="svg" aria-hidden="true"></span>
+      </a>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_shared/pipeline_svg_icons.js b/app/assets/javascripts/vue_shared/pipeline_svg_icons.js
new file mode 100644
index 00000000000..5af30ae74f0
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/pipeline_svg_icons.js
@@ -0,0 +1,43 @@
+import canceledSvg from 'icons/_icon_status_canceled.svg';
+import createdSvg from 'icons/_icon_status_created.svg';
+import failedSvg from 'icons/_icon_status_failed.svg';
+import manualSvg from 'icons/_icon_status_manual.svg';
+import pendingSvg from 'icons/_icon_status_pending.svg';
+import runningSvg from 'icons/_icon_status_running.svg';
+import skippedSvg from 'icons/_icon_status_skipped.svg';
+import successSvg from 'icons/_icon_status_success.svg';
+import warningSvg from 'icons/_icon_status_warning.svg';
+
+import canceledBorderlessSvg from 'icons/_icon_status_canceled_borderless.svg';
+import createdBorderlessSvg from 'icons/_icon_status_created_borderless.svg';
+import failedBorderlessSvg from 'icons/_icon_status_failed_borderless.svg';
+import manualBorderlessSvg from 'icons/_icon_status_manual_borderless.svg';
+import pendingBorderlessSvg from 'icons/_icon_status_pending_borderless.svg';
+import runningBorderlessSvg from 'icons/_icon_status_running_borderless.svg';
+import skippedBorderlessSvg from 'icons/_icon_status_skipped_borderless.svg';
+import successBorderlessSvg from 'icons/_icon_status_success_borderless.svg';
+import warningBorderlessSvg from 'icons/_icon_status_warning_borderless.svg';
+
+export const statusClassToSvgMap = {
+  icon_status_canceled: canceledSvg,
+  icon_status_created: createdSvg,
+  icon_status_failed: failedSvg,
+  icon_status_manual: manualSvg,
+  icon_status_pending: pendingSvg,
+  icon_status_running: runningSvg,
+  icon_status_skipped: skippedSvg,
+  icon_status_success: successSvg,
+  icon_status_warning: warningSvg,
+};
+
+export const statusClassToBorderlessSvgMap = {
+  icon_status_canceled: canceledBorderlessSvg,
+  icon_status_created: createdBorderlessSvg,
+  icon_status_failed: failedBorderlessSvg,
+  icon_status_manual: manualBorderlessSvg,
+  icon_status_pending: pendingBorderlessSvg,
+  icon_status_running: runningBorderlessSvg,
+  icon_status_skipped: skippedBorderlessSvg,
+  icon_status_success: successBorderlessSvg,
+  icon_status_warning: warningBorderlessSvg,
+};
diff --git a/app/assets/stylesheets/framework.scss b/app/assets/stylesheets/framework.scss
index 5bb7e8caec1..d2ec1791d2b 100644
--- a/app/assets/stylesheets/framework.scss
+++ b/app/assets/stylesheets/framework.scss
@@ -47,3 +47,4 @@
 @import "framework/emoji-sprites.scss";
 @import "framework/icons.scss";
 @import "framework/snippets.scss";
+@import "framework/memory_graph.scss";
diff --git a/app/assets/stylesheets/framework/common.scss b/app/assets/stylesheets/framework/common.scss
index 1a6f36d032d..57387b913dc 100644
--- a/app/assets/stylesheets/framework/common.scss
+++ b/app/assets/stylesheets/framework/common.scss
@@ -92,7 +92,8 @@ hr {
 .item-title { font-weight: 600; }
 
 /** FLASH message **/
-.author_link {
+.author_link,
+.author-link {
   color: $gl-link-color;
 }
 
diff --git a/app/assets/stylesheets/framework/icons.scss b/app/assets/stylesheets/framework/icons.scss
index 87667f39ab8..1b7d4e42258 100644
--- a/app/assets/stylesheets/framework/icons.scss
+++ b/app/assets/stylesheets/framework/icons.scss
@@ -1,4 +1,5 @@
-.ci-status-icon-success {
+.ci-status-icon-success,
+.ci-status-icon-passed {
   color: $green-500;
 
   svg {
diff --git a/app/assets/stylesheets/framework/memory_graph.scss b/app/assets/stylesheets/framework/memory_graph.scss
new file mode 100644
index 00000000000..8473f2ef094
--- /dev/null
+++ b/app/assets/stylesheets/framework/memory_graph.scss
@@ -0,0 +1,16 @@
+.memory-graph-container {
+  svg {
+    background: $white-light;
+  }
+
+  path {
+    fill: none;
+    stroke: $blue-500;
+    stroke-width: 1px;
+  }
+
+  circle {
+    stroke: $blue-700;
+    fill: $blue-700;
+  }
+}
diff --git a/app/assets/stylesheets/framework/variables.scss b/app/assets/stylesheets/framework/variables.scss
index 08bcb582613..4cfa5d718e9 100644
--- a/app/assets/stylesheets/framework/variables.scss
+++ b/app/assets/stylesheets/framework/variables.scss
@@ -111,6 +111,7 @@ $gl-link-hover-color: $blue-800;
 $gl-grayish-blue: #7f8fa4;
 $gl-gray: $gl-text-color;
 $gl-gray-dark: #313236;
+$gl-gray-light: #5c5c5c;
 $gl-header-color: #4c4e54;
 $gl-header-nav-hover-color: #434343;
 $placeholder-text-color: rgba(0, 0, 0, .42);
diff --git a/app/assets/stylesheets/pages/merge_requests.scss b/app/assets/stylesheets/pages/merge_requests.scss
index 72660113e3c..f4488ccd8fe 100644
--- a/app/assets/stylesheets/pages/merge_requests.scss
+++ b/app/assets/stylesheets/pages/merge_requests.scss
@@ -37,12 +37,6 @@
           @include btn-red;
         }
       }
-
-      .dropdown-toggle {
-        .fa {
-          color: inherit;
-        }
-      }
     }
 
     .accept-control {
@@ -88,13 +82,13 @@
     }
   }
 
-  .ci_widget {
-    border-bottom: 1px solid $well-inner-border;
+  .ci-widget {
     color: $gl-text-color;
     display: -webkit-flex;
     display: flex;
     -webkit-align-items: center;
     align-items: center;
+    padding: $gl-padding-top $gl-padding 0;
 
     i,
     svg {
@@ -115,16 +109,15 @@
       flex-wrap: wrap;
     }
 
-    .ci-status-icon > .icon-link > svg {
+    .ci-status-icon > .icon-link svg {
       width: 22px;
       height: 22px;
     }
   }
 
   .mr-widget-body,
-  .ci_widget,
   .mr-widget-footer {
-    padding: 16px;
+    margin: 16px;
   }
 
   .mr-widget-pipeline-graph {
@@ -166,12 +159,41 @@
 
   .normal {
     color: $gl-text-color;
+    font-size: 15px;
+  }
+
+  .capitalize {
+    text-transform: capitalize;
   }
 
   .js-deployment-link {
     display: inline-block;
   }
 
+  .mr-widget-help {
+    margin: $gl-padding;
+    color: $ci-skipped-color;
+  }
+
+  .mr-info-list {
+
+    &.mr-links {
+      margin-left: 28px;
+    }
+
+    &.mr-memory-usage {
+      margin-top: 10px;
+      margin-bottom: 10px;
+    }
+  }
+
+  .mr-widget-heading,
+  .mr-widget-body {
+    .btn-default.btn-xs {
+      margin-left: 5px;
+    }
+  }
+
   .mr-widget-body {
     h4 {
       font-weight: 600;
@@ -182,6 +204,10 @@
       &.has-conflicts .fa-exclamation-triangle {
         color: $gl-warning;
       }
+
+      time {
+        font-weight: normal;
+      }
     }
 
     .btn-grouped {
@@ -189,6 +215,80 @@
       margin-right: 7px;
     }
 
+    label {
+      font-weight: normal;
+    }
+
+    .spacing {
+      margin: 0 $gl-padding;
+    }
+
+    .bold {
+      margin-left: 5px;
+      font-weight: bold;
+      color: $gl-gray-light;
+    }
+
+    .state-label {
+      font-size: 16px;
+      font-weight: bold;
+      padding-right: 10px;
+    }
+
+    .danger {
+      color: $gl-danger;
+    }
+
+    .mr-widget-help {
+      margin: $gl-padding 0;
+    }
+
+    .with-button {
+      position: relative;
+      top: 6px;
+      margin-bottom: 24px;
+    }
+
+    .dropdown-menu {
+      li a {
+        padding: 5px;
+      }
+
+      .merge-opt-icon,
+      .merge-opt-title {
+        display: inline-block;
+        float: left;
+      }
+
+      .merge-opt-icon svg {
+        height: 15px;
+        width: 15px;
+      }
+
+      .merge-opt-title {
+        margin-left: 8px;
+      }
+    }
+
+    .dropdown-toggle {
+      .fa {
+        color: inherit;
+      }
+    }
+
+    .has-error-message + .has-custom-error {
+      margin-left: 0;
+    }
+
+    .has-custom-error {
+      display: inline-block;
+      margin-left: 70px;
+    }
+
+    .merge-error-text {
+      margin-left: 70px;
+    }
+
     @media (max-width: $screen-xs-max) {
       h4 {
         font-size: 14px;
@@ -220,6 +320,17 @@
         margin: 0;
       }
     }
+
+    .commit-message-editor {
+      label {
+        padding: 0;
+      }
+    }
+
+    &.mr-state-locked .mr-info-list {
+      margin-top: 10px;
+      margin-left: 12px;
+    }
   }
 
   .mr-widget-footer {
@@ -263,6 +374,24 @@
   font-size: 90%;
   margin: 0 3px;
   word-break: break-all;
+
+  &.label-truncated {
+    position: relative;
+    display: inline-block;
+    width: 250px;
+    margin-bottom: -3px;
+    white-space: nowrap;
+    text-overflow: clip;
+    line-height: 14px;
+
+    &::after {
+      position: absolute;
+      content: '...';
+      right: 0;
+      font-family: $regular_font;
+      background-color: $gray-light;
+    }
+  }
 }
 
 .commits-empty {
@@ -343,61 +472,74 @@
   }
 }
 
-.remove-message-pipes {
-  ul {
-    margin: 10px 0 0 12px;
-    padding: 0;
-    list-style: none;
-    border-left: 2px solid $border-color;
-    display: inline-block;
-  }
+.mr-info-list {
+  position: relative;
+  margin: 10px 0 $gl-padding 12px;
 
-  li {
+  p {
+    margin: 6px 0;
     position: relative;
-    margin: 0;
-    padding: 0;
-    display: block;
+    padding-left: 15px;
+
+    &::before {
+      content: '';
+      position: absolute;
+      border-top: 2px solid $border-color;
+      height: 1px;
+      top: 8px;
+      width: 8px;
+      left: 0;
+    }
+
+    &:last-child {
+      margin-bottom: 0;
 
-    span {
-      margin-left: 15px;
-      max-height: 20px;
+      &::before {
+        top: 14px;
+      }
     }
   }
 
-  li::before {
-    content: '';
+  .legend {
+    height: 100%;
+    width: 2px;
+    background: $border-color;
     position: absolute;
-    border-top: 2px solid $border-color;
-    height: 1px;
-    top: 8px;
-    width: 8px;
+    top: -5px;
+  }
+}
+
+.mr-info-list.mr-memory-usage {
+  .legend {
+    height: 75%;
   }
 
-  li:last-child {
+  p {
+    float: left;
+    padding-left: 20px;
+
     &::before {
-      top: 18px;
+      top: 13px;
     }
+  }
 
-    span {
-      display: block;
-      position: relative;
-      top: 5px;
-      margin-top: 5px;
-    }
+  .memory-graph-container {
+    float: left;
+    margin-left: 5px;
   }
 }
 
 .mr-source-target {
   background-color: $gray-light;
-  line-height: 31px;
-  border-style: solid;
-  border-width: 1px;
-  border-color: $border-color;
-  border-top-right-radius: 3px;
-  border-top-left-radius: 3px;
-  border-bottom: none;
-  padding: 16px;
-  margin-bottom: -1px;
+  border-radius: 3px 3px 0 0;
+  border-bottom: 1px solid $border-color;
+  padding: 0 $gl-padding;
+  margin-bottom: 6px;
+  line-height: 44px;
+
+  .dropdown-toggle .fa {
+    color: $gl-text-color;
+  }
 }
 
 .panel-new-merge-request {
@@ -587,3 +729,20 @@
     }
   }
 }
+
+.mr-memory-usage {
+  p.usage-info-loading {
+    margin-bottom: 6px;
+
+    .usage-info-load-spinner {
+      margin-right: 10px;
+      font-size: 16px;
+    }
+  }
+
+  @media (max-width: $screen-md-min) {
+    .mr-info-list.mr-memory-usage .legend {
+      height: 80%;
+    }
+  }
+}
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 65a1f640a76..8ce9150e4a9 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -100,7 +100,10 @@ class ApplicationController < ActionController::Base
   end
 
   def access_denied!
-    render "errors/access_denied", layout: "errors", status: 404
+    respond_to do |format|
+      format.json { head :not_found }
+      format.any { render "errors/access_denied", layout: "errors", status: 404 }
+    end
   end
 
   def git_not_found!
diff --git a/app/controllers/projects/branches_controller.rb b/app/controllers/projects/branches_controller.rb
index 59247280559..d8ed470e461 100644
--- a/app/controllers/projects/branches_controller.rb
+++ b/app/controllers/projects/branches_controller.rb
@@ -84,6 +84,7 @@ class Projects::BranchesController < Projects::ApplicationController
       end
 
       format.js { render nothing: true, status: result[:return_code] }
+      format.json { render json: { message: result[:message] }, status: result[:return_code] }
     end
   end
 
diff --git a/app/controllers/projects/builds_controller.rb b/app/controllers/projects/builds_controller.rb
index 0fd35bcb790..dfaaea71b9c 100644
--- a/app/controllers/projects/builds_controller.rb
+++ b/app/controllers/projects/builds_controller.rb
@@ -91,7 +91,7 @@ class Projects::BuildsController < Projects::ApplicationController
 
   def status
     render json: BuildSerializer
-      .new(project: @project, user: @current_user)
+      .new(project: @project, current_user: @current_user)
       .represent_status(@build)
   end
 
diff --git a/app/controllers/projects/commit_controller.rb b/app/controllers/projects/commit_controller.rb
index 2b5f0383ac1..7c3cce1c241 100644
--- a/app/controllers/projects/commit_controller.rb
+++ b/app/controllers/projects/commit_controller.rb
@@ -39,7 +39,7 @@ class Projects::CommitController < Projects::ApplicationController
         Gitlab::PollingInterval.set_header(response, interval: 10_000)
 
         render json: PipelineSerializer
-          .new(project: @project, user: @current_user)
+          .new(project: @project, current_user: @current_user)
           .represent(@pipelines)
       end
     end
diff --git a/app/controllers/projects/deployments_controller.rb b/app/controllers/projects/deployments_controller.rb
index c319671456d..b33c0b00ad9 100644
--- a/app/controllers/projects/deployments_controller.rb
+++ b/app/controllers/projects/deployments_controller.rb
@@ -10,8 +10,22 @@ class Projects::DeploymentsController < Projects::ApplicationController
                                   .represent_concise(deployments) }
   end
 
+  def metrics
+    @metrics = deployment.metrics(1.hour)
+
+    if @metrics&.any?
+      render json: @metrics, status: :ok
+    else
+      head :no_content
+    end
+  end
+
   private
 
+  def deployment
+    @deployment ||= environment.deployments.find_by(iid: params[:id])
+  end
+
   def environment
     @environment ||= project.environments.find(params[:environment_id])
   end
diff --git a/app/controllers/projects/environments_controller.rb b/app/controllers/projects/environments_controller.rb
index fa37963dfd4..fd57afbd05f 100644
--- a/app/controllers/projects/environments_controller.rb
+++ b/app/controllers/projects/environments_controller.rb
@@ -17,7 +17,7 @@ class Projects::EnvironmentsController < Projects::ApplicationController
       format.json do
         render json: {
           environments: EnvironmentSerializer
-            .new(project: @project, user: @current_user)
+            .new(project: @project, current_user: @current_user)
             .with_pagination(request, response)
             .within_folders
             .represent(@environments),
@@ -37,7 +37,7 @@ class Projects::EnvironmentsController < Projects::ApplicationController
       format.json do
         render json: {
           environments: EnvironmentSerializer
-            .new(project: @project, user: @current_user)
+            .new(project: @project, current_user: @current_user)
             .with_pagination(request, response)
             .represent(@environments),
           available_count: folder_environments.available.count,
@@ -81,10 +81,16 @@ class Projects::EnvironmentsController < Projects::ApplicationController
 
     stop_action = @environment.stop_with_action!(current_user)
 
-    if stop_action
-      redirect_to polymorphic_path([project.namespace.becomes(Namespace), project, stop_action])
-    else
-      redirect_to namespace_project_environment_path(project.namespace, project, @environment)
+    action_or_env_url =
+      if stop_action
+        polymorphic_url([project.namespace.becomes(Namespace), project, stop_action])
+      else
+        namespace_project_environment_url(project.namespace, project, @environment)
+      end
+
+    respond_to do |format|
+      format.html { redirect_to action_or_env_url }
+      format.json { render json: { redirect_url: action_or_env_url } }
     end
   end
 
diff --git a/app/controllers/projects/merge_requests_controller.rb b/app/controllers/projects/merge_requests_controller.rb
index a63b7ff0bed..44c7eb86855 100755
--- a/app/controllers/projects/merge_requests_controller.rb
+++ b/app/controllers/projects/merge_requests_controller.rb
@@ -10,11 +10,10 @@ class Projects::MergeRequestsController < Projects::ApplicationController
   before_action :module_enabled
   before_action :merge_request, only: [
     :edit, :update, :show, :diffs, :commits, :conflicts, :conflict_for_path, :pipelines, :merge, :merge_check,
-    :ci_status, :pipeline_status, :ci_environments_status, :toggle_subscription, :cancel_merge_when_pipeline_succeeds, :remove_wip, :resolve_conflicts, :assign_related_issues
+    :pipeline_status, :ci_environments_status, :toggle_subscription, :cancel_merge_when_pipeline_succeeds, :remove_wip, :resolve_conflicts, :assign_related_issues, :commit_change_content
   ]
   before_action :validates_merge_request, only: [:show, :diffs, :commits, :pipelines]
   before_action :define_show_vars, only: [:show, :diffs, :commits, :conflicts, :conflict_for_path, :builds, :pipelines]
-  before_action :define_widget_vars, only: [:merge, :cancel_merge_when_pipeline_succeeds, :merge_check]
   before_action :define_commit_vars, only: [:diffs]
   before_action :ensure_ref_fetched, only: [:show, :diffs, :commits, :builds, :conflicts, :conflict_for_path, :pipelines]
   before_action :close_merge_request_without_source_project, only: [:show, :diffs, :commits, :builds, :pipelines]
@@ -74,10 +73,12 @@ class Projects::MergeRequestsController < Projects::ApplicationController
 
   def show
     respond_to do |format|
-      format.html { define_discussion_vars }
+      format.html do
+        define_discussion_vars
+      end
 
       format.json do
-        render json: MergeRequestSerializer.new.represent(@merge_request)
+        render json: serializer.represent(@merge_request, basic: params[:basic])
       end
 
       format.patch  do
@@ -214,7 +215,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
         Gitlab::PollingInterval.set_header(response, interval: 10_000)
 
         render json: PipelineSerializer
-          .new(project: @project, user: @current_user)
+          .new(project: @project, current_user: @current_user)
           .represent(@pipelines)
       end
     end
@@ -230,7 +231,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
 
         render json: {
           pipelines: PipelineSerializer
-          .new(project: @project, user: @current_user)
+          .new(project: @project, current_user: @current_user)
           .represent(@pipelines)
         }
       end
@@ -299,17 +300,21 @@ class Projects::MergeRequestsController < Projects::ApplicationController
   end
 
   def remove_wip
-    MergeRequests::UpdateService.new(project, current_user, wip_event: 'unwip').execute(@merge_request)
+    @merge_request = MergeRequests::UpdateService
+      .new(project, current_user, wip_event: 'unwip')
+      .execute(@merge_request)
 
-    redirect_to namespace_project_merge_request_path(@project.namespace, @project, @merge_request),
-      notice: "The merge request can now be merged."
+    render json: serializer.represent(@merge_request)
   end
 
   def merge_check
     @merge_request.check_if_can_be_merged
-    @pipelines = @merge_request.all_pipelines
 
-    render partial: "projects/merge_requests/widget/show.html.haml", layout: false
+    render json: serializer.represent(@merge_request)
+  end
+
+  def commit_change_content
+    render partial: 'projects/merge_requests/widget/commit_change_content', layout: false
   end
 
   def cancel_merge_when_pipeline_succeeds
@@ -320,65 +325,22 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     MergeRequests::MergeWhenPipelineSucceedsService
       .new(@project, current_user)
       .cancel(@merge_request)
+
+    render json: serializer.represent(@merge_request)
   end
 
   def merge
     return access_denied! unless @merge_request.can_be_merged_by?(current_user)
 
-    # Disable the CI check if merge_when_pipeline_succeeds is enabled since we have
-    # to wait until CI completes to know
-    unless @merge_request.mergeable?(skip_ci_check: merge_when_pipeline_succeeds_active?)
-      @status = :failed
-      return
-    end
-
-    if params[:sha] != @merge_request.diff_head_sha
-      @status = :sha_mismatch
-      return
-    end
-
-    @merge_request.update(merge_error: nil)
+    status = merge!
 
-    if params[:merge_when_pipeline_succeeds].present?
-      unless @merge_request.head_pipeline
-        @status = :failed
-        return
-      end
-
-      if @merge_request.head_pipeline.active?
-        MergeRequests::MergeWhenPipelineSucceedsService
-          .new(@project, current_user, merge_params)
-          .execute(@merge_request)
-
-        @status = :merge_when_pipeline_succeeds
-      elsif @merge_request.head_pipeline.success?
-        # This can be triggered when a user clicks the auto merge button while
-        # the tests finish at about the same time
-        MergeWorker.perform_async(@merge_request.id, current_user.id, params)
-        @status = :success
-      else
-        @status = :failed
-      end
+    if @merge_request.merge_error
+      render json: { status: status, merge_error: @merge_request.merge_error }
     else
-      MergeWorker.perform_async(@merge_request.id, current_user.id, params)
-      @status = :success
+      render json: { status: status }
     end
   end
 
-  def merge_widget_refresh
-    @status =
-      if merge_request.merge_when_pipeline_succeeds
-        :merge_when_pipeline_succeeds
-      else
-        # Only MRs that can be merged end in this action
-        # MR can be already picked up for merge / merged already or can be waiting for worker to be picked up
-        # in last case it does not have any special status. Possible error is handled inside widget js function
-        :success
-      end
-
-    render 'merge'
-  end
-
   def branch_from
     # This is always source
     @source_project = @merge_request.nil? ? @project : @merge_request.source_project
@@ -428,37 +390,9 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     end
   end
 
-  def ci_status
-    pipeline = @merge_request.head_pipeline
-    @pipelines = @merge_request.all_pipelines
-
-    if pipeline
-      status = pipeline.status
-      coverage = pipeline.coverage
-
-      status = "success_with_warnings" if pipeline.success? && pipeline.has_warnings?
-
-      status ||= "preparing"
-    else
-      ci_service = @merge_request.source_project.try(:ci_service)
-      status = ci_service.commit_status(merge_request.diff_head_sha, merge_request.source_branch) if ci_service
-    end
-
-    response = {
-      title: merge_request.title,
-      sha: (merge_request.diff_head_commit.short_id if merge_request.diff_head_sha),
-      status: status,
-      coverage: coverage,
-      pipeline: pipeline.try(:id),
-      has_ci: @merge_request.has_ci?
-    }
-
-    render json: response
-  end
-
   def pipeline_status
     render json: PipelineSerializer
-      .new(project: @project, user: @current_user)
+      .new(project: @project, current_user: @current_user)
       .represent_status(@merge_request.head_pipeline)
   end
 
@@ -474,10 +408,19 @@ class Projects::MergeRequestsController < Projects::ApplicationController
               stop_namespace_project_environment_path(project.namespace, project, environment)
             end
 
+          metrics_url =
+            if can?(current_user, :read_environment, environment) && environment.has_metrics?
+              metrics_namespace_project_environment_path(environment.project.namespace,
+                                                         environment.project,
+                                                         environment,
+                                                         deployment)
+            end
+
           {
             id: environment.id,
             name: environment.name,
             url: namespace_project_environment_path(project.namespace, project, environment),
+            metrics_url: metrics_url,
             stop_url: stop_url,
             external_url: environment.external_url,
             external_url_formatted: environment.formatted_external_url,
@@ -555,10 +498,6 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     @notes = prepare_notes_for_rendering(@discussions.flat_map(&:notes))
   end
 
-  def define_widget_vars
-    @pipeline = @merge_request.head_pipeline
-  end
-
   def define_commit_vars
     @commit = @merge_request.diff_head_commit
     @base_commit = @merge_request.diff_base_commit || @merge_request.likely_diff_base_commit
@@ -694,4 +633,46 @@ class Projects::MergeRequestsController < Projects::ApplicationController
       @merge_request.close
     end
   end
+
+  private
+
+  def merge!
+    # Disable the CI check if merge_when_pipeline_succeeds is enabled since we have
+    # to wait until CI completes to know
+    unless @merge_request.mergeable?(skip_ci_check: merge_when_pipeline_succeeds_active?)
+      return :failed
+    end
+
+    return :sha_mismatch if params[:sha] != @merge_request.diff_head_sha
+
+    @merge_request.update(merge_error: nil)
+
+    if params[:merge_when_pipeline_succeeds].present?
+      return :failed unless @merge_request.head_pipeline
+
+      if @merge_request.head_pipeline.active?
+        MergeRequests::MergeWhenPipelineSucceedsService
+          .new(@project, current_user, merge_params)
+          .execute(@merge_request)
+
+        :merge_when_pipeline_succeeds
+      elsif @merge_request.head_pipeline.success?
+        # This can be triggered when a user clicks the auto merge button while
+        # the tests finish at about the same time
+        MergeWorker.perform_async(@merge_request.id, current_user.id, params)
+
+        :success
+      else
+        :failed
+      end
+    else
+      MergeWorker.perform_async(@merge_request.id, current_user.id, params)
+
+      :success
+    end
+  end
+
+  def serializer
+    MergeRequestSerializer.new(current_user: current_user, project: merge_request.project)
+  end
 end
diff --git a/app/controllers/projects/pipelines_controller.rb b/app/controllers/projects/pipelines_controller.rb
index 5cb2e428201..7fe3c3c116c 100644
--- a/app/controllers/projects/pipelines_controller.rb
+++ b/app/controllers/projects/pipelines_controller.rb
@@ -37,7 +37,7 @@ class Projects::PipelinesController < Projects::ApplicationController
 
         render json: {
           pipelines: PipelineSerializer
-            .new(project: @project, user: @current_user)
+            .new(project: @project, current_user: @current_user)
             .with_pagination(request, response)
             .represent(@pipelines),
           count: {
@@ -74,7 +74,7 @@ class Projects::PipelinesController < Projects::ApplicationController
         Gitlab::PollingInterval.set_header(response, interval: POLLING_INTERVAL)
 
         render json: PipelineSerializer
-          .new(project: @project, user: @current_user)
+          .new(project: @project, current_user: @current_user)
           .represent(@pipeline, grouped: true)
       end
     end
@@ -94,7 +94,7 @@ class Projects::PipelinesController < Projects::ApplicationController
 
   def status
     render json: PipelineSerializer
-      .new(project: @project, user: @current_user)
+      .new(project: @project, current_user: @current_user)
       .represent_status(@pipeline)
   end
 
diff --git a/app/helpers/issuables_helper.rb b/app/helpers/issuables_helper.rb
index 7656929efe7..fbbce6876c2 100644
--- a/app/helpers/issuables_helper.rb
+++ b/app/helpers/issuables_helper.rb
@@ -37,7 +37,10 @@ module IssuablesHelper
     when Issue
       IssueSerializer.new.represent(issuable).to_json
     when MergeRequest
-      MergeRequestSerializer.new.represent(issuable).to_json
+      MergeRequestSerializer
+        .new(current_user: current_user, project: issuable.project)
+        .represent(issuable)
+        .to_json
     end
   end
 
diff --git a/app/helpers/merge_requests_helper.rb b/app/helpers/merge_requests_helper.rb
index 2614cdfe90e..23e55539f0a 100644
--- a/app/helpers/merge_requests_helper.rb
+++ b/app/helpers/merge_requests_helper.rb
@@ -19,14 +19,6 @@ module MergeRequestsHelper
     }
   end
 
-  def mr_widget_refresh_url(mr)
-    if mr && mr.target_project
-      merge_widget_refresh_namespace_project_merge_request_url(mr.target_project.namespace, mr.target_project, mr)
-    else
-      ''
-    end
-  end
-
   def mr_css_classes(mr)
     classes = "merge-request"
     classes << " closed" if mr.closed?
@@ -55,23 +47,6 @@ module MergeRequestsHelper
     end
   end
 
-  def issues_sentence(issues)
-    # Issuable sorter will sort local issues, then issues from the same
-    # namespace, then all other issues.
-    issues = Gitlab::IssuableSorter.sort(@project, issues).map do |issue|
-      issue.to_reference(@project)
-    end
-    issues.to_sentence
-  end
-
-  def mr_closes_issues
-    @mr_closes_issues ||= @merge_request.closes_issues(current_user)
-  end
-
-  def mr_issues_mentioned_but_not_closing
-    @mr_issues_mentioned_but_not_closing ||= @merge_request.issues_mentioned_but_not_closing(current_user)
-  end
-
   def mr_change_branches_path(merge_request)
     new_namespace_project_merge_request_path(
       @project.namespace, @project,
@@ -85,35 +60,6 @@ module MergeRequestsHelper
     )
   end
 
-  def mr_assign_issues_link
-    issues = MergeRequests::AssignIssuesService.new(@project,
-                                                    current_user,
-                                                    merge_request: @merge_request,
-                                                    closes_issues: mr_closes_issues
-                                                   ).assignable_issues
-    path = assign_related_issues_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)
-    if issues.present?
-      pluralize_this_issue = issues.count > 1 ? "these issues" : "this issue"
-      link_to "Assign yourself to #{pluralize_this_issue}", path, method: :post
-    end
-  end
-
-  def source_branch_with_namespace(merge_request)
-    namespace = merge_request.source_project_namespace
-    branch = merge_request.source_branch
-
-    if merge_request.source_branch_exists?
-      namespace = link_to(namespace, project_path(merge_request.source_project))
-      branch = link_to(branch, namespace_project_commits_path(merge_request.source_project.namespace, merge_request.source_project, merge_request.source_branch))
-    end
-
-    if merge_request.for_fork?
-      namespace + ":" + branch
-    else
-      branch
-    end
-  end
-
   def format_mr_branch_names(merge_request)
     source_path = merge_request.source_project_path
     target_path = merge_request.target_project_path
diff --git a/app/models/concerns/mentionable.rb b/app/models/concerns/mentionable.rb
index 5ac56ac6fa0..6eddeab515e 100644
--- a/app/models/concerns/mentionable.rb
+++ b/app/models/concerns/mentionable.rb
@@ -92,7 +92,7 @@ module Mentionable
   # Uses regex to quickly determine if mentionables might be referenced
   # Allows heavy processing to be skipped
   def matches_cross_reference_regex?
-    reference_pattern = if project.default_issues_tracker?
+    reference_pattern = if !project || project.default_issues_tracker?
                           ReferenceRegexes::DEFAULT_PATTERN
                         else
                           ReferenceRegexes::EXTERNAL_PATTERN
diff --git a/app/models/deployment.rb b/app/models/deployment.rb
index 37adfb4de73..f83d9e8edee 100644
--- a/app/models/deployment.rb
+++ b/app/models/deployment.rb
@@ -99,6 +99,21 @@ class Deployment < ActiveRecord::Base
     created_at.to_time.in_time_zone.to_s(:medium)
   end
 
+  def has_metrics?
+    project.monitoring_service.present?
+  end
+
+  def metrics(timeframe)
+    return {} unless has_metrics?
+
+    half_timeframe = timeframe / 2
+    timeframe_start = created_at - half_timeframe
+    timeframe_end = created_at + half_timeframe
+
+    metrics = project.monitoring_service.metrics(environment, timeframe_start: timeframe_start, timeframe_end: timeframe_end)
+    metrics&.merge(deployment_time: created_at.to_i) || {}
+  end
+
   private
 
   def ref_path
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index 35231bab12e..1b6904aa077 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -864,7 +864,7 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def can_be_cherry_picked?
-    merge_commit
+    merge_commit.present?
   end
 
   def has_complete_diff_refs?
@@ -908,6 +908,8 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def conflicts_can_be_resolved_by?(user)
+    return false unless source_project
+
     access = ::Gitlab::UserAccess.new(user, project: source_project)
     access.can_push_to_branch?(source_branch)
   end
diff --git a/app/models/project_services/chat_notification_service.rb b/app/models/project_services/chat_notification_service.rb
index fa782c6fbb7..6464bf3f4a4 100644
--- a/app/models/project_services/chat_notification_service.rb
+++ b/app/models/project_services/chat_notification_service.rb
@@ -150,7 +150,7 @@ class ChatNotificationService < Service
 
   def notify_for_ref?(data)
     return true if data[:object_attributes][:tag]
-    return true unless notify_only_default_branch
+    return true unless notify_only_default_branch?
 
     data[:object_attributes][:ref] == project.default_branch
   end
diff --git a/app/models/project_services/monitoring_service.rb b/app/models/project_services/monitoring_service.rb
index ea585721e8f..59776552540 100644
--- a/app/models/project_services/monitoring_service.rb
+++ b/app/models/project_services/monitoring_service.rb
@@ -10,7 +10,7 @@ class MonitoringService < Service
   end
 
   # Environments have a number of metrics
-  def metrics(environment)
+  def metrics(environment, timeframe_start: nil, timeframe_end: nil)
     raise NotImplementedError
   end
 end
diff --git a/app/models/project_services/prometheus_service.rb b/app/models/project_services/prometheus_service.rb
index 6854d2243d7..6a4479c4dbc 100644
--- a/app/models/project_services/prometheus_service.rb
+++ b/app/models/project_services/prometheus_service.rb
@@ -1,7 +1,6 @@
 class PrometheusService < MonitoringService
-  include ReactiveCaching
+  include ReactiveService
 
-  self.reactive_cache_key = ->(service) { [service.class.model_name.singular, service.project_id] }
   self.reactive_cache_lease_timeout = 30.seconds
   self.reactive_cache_refresh_interval = 30.seconds
   self.reactive_cache_lifetime = 1.minute
@@ -64,16 +63,22 @@ class PrometheusService < MonitoringService
     { success: false, result: err }
   end
 
-  def metrics(environment)
-    with_reactive_cache(environment.slug) do |data|
+  def metrics(environment, timeframe_start: nil, timeframe_end: nil)
+    with_reactive_cache(environment.slug, timeframe_start, timeframe_end) do |data|
       data
     end
   end
 
   # Cache metrics for specific environment
-  def calculate_reactive_cache(environment_slug)
+  def calculate_reactive_cache(environment_slug, timeframe_start, timeframe_end)
     return unless active? && project && !project.pending_delete?
 
+    timeframe_start = Time.parse(timeframe_start) if timeframe_start
+    timeframe_end = Time.parse(timeframe_end) if timeframe_end
+
+    timeframe_start ||= 8.hours.ago
+    timeframe_end ||= Time.now
+
     memory_query = %{(sum(container_memory_usage_bytes{container_name!="POD",environment="#{environment_slug}"}) / count(container_memory_usage_bytes{container_name!="POD",environment="#{environment_slug}"})) /1024/1024}
     cpu_query = %{sum(rate(container_cpu_usage_seconds_total{container_name!="POD",environment="#{environment_slug}"}[2m])) / count(container_cpu_usage_seconds_total{container_name!="POD",environment="#{environment_slug}"}) * 100}
 
@@ -81,11 +86,13 @@ class PrometheusService < MonitoringService
       success: true,
       metrics: {
         # Average Memory used in MB
-        memory_values: client.query_range(memory_query, start: 8.hours.ago),
-        memory_current: client.query(memory_query),
+        memory_values: client.query_range(memory_query, start: timeframe_start, stop: timeframe_end),
+        memory_current: client.query(memory_query, time: timeframe_end),
+        memory_previous: client.query(memory_query, time: timeframe_start),
         # Average CPU Utilization
-        cpu_values: client.query_range(cpu_query, start: 8.hours.ago),
-        cpu_current: client.query(cpu_query)
+        cpu_values: client.query_range(cpu_query, start: timeframe_start, stop: timeframe_end),
+        cpu_current: client.query(cpu_query, time: timeframe_end),
+        cpu_previous: client.query(cpu_query, time: timeframe_start)
       },
       last_update: Time.now.utc
     }
diff --git a/app/presenters/merge_request_presenter.rb b/app/presenters/merge_request_presenter.rb
new file mode 100644
index 00000000000..255f63db5c2
--- /dev/null
+++ b/app/presenters/merge_request_presenter.rb
@@ -0,0 +1,168 @@
+class MergeRequestPresenter < Gitlab::View::Presenter::Delegated
+  include ActionView::Helpers::UrlHelper
+  include GitlabRoutingHelper
+  include MarkupHelper
+  include TreeHelper
+
+  presents :merge_request
+
+  def ci_status
+    if pipeline
+      status = pipeline.status
+      status = "success_with_warnings" if pipeline.success? && pipeline.has_warnings?
+
+      status || "preparing"
+    else
+      ci_service = source_project.try(:ci_service)
+      ci_service&.commit_status(diff_head_sha, source_branch)
+    end
+  end
+
+  def cancel_merge_when_pipeline_succeeds_path
+    if can_cancel_merge_when_pipeline_succeeds?(current_user)
+      cancel_merge_when_pipeline_succeeds_namespace_project_merge_request_path(
+        project.namespace,
+        project,
+        merge_request)
+    end
+  end
+
+  def create_issue_to_resolve_discussions_path
+    if can?(current_user, :create_issue, project) && project.issues_enabled?
+      new_namespace_project_issue_path(project.namespace,
+                                       project,
+                                       merge_request_to_resolve_discussions_of: iid)
+    end
+  end
+
+  def remove_wip_path
+    if can?(current_user, :update_merge_request, merge_request.project)
+      remove_wip_namespace_project_merge_request_path(project.namespace, project, merge_request)
+    end
+  end
+
+  def merge_path
+    if can_be_merged_by?(current_user)
+      merge_namespace_project_merge_request_path(project.namespace, project, merge_request)
+    end
+  end
+
+  def revert_in_fork_path
+    if user_can_fork_project? && can_be_reverted?(current_user)
+      continue_params = {
+        to: merge_request_path(merge_request),
+        notice: "#{edit_in_new_fork_notice} Try to cherry-pick this commit again.",
+        notice_now: edit_in_new_fork_notice_now
+      }
+
+      namespace_project_forks_path(merge_request.project.namespace, merge_request.project,
+                                   namespace_key: current_user.namespace.id,
+                                   continue: continue_params)
+    end
+  end
+
+  def cherry_pick_in_fork_path
+    if user_can_fork_project? && can_be_cherry_picked?
+      continue_params = {
+        to: merge_request_path(merge_request),
+        notice: "#{edit_in_new_fork_notice} Try to revert this commit again.",
+        notice_now: edit_in_new_fork_notice_now
+      }
+
+      namespace_project_forks_path(project.namespace, project,
+                                   namespace_key: current_user.namespace.id,
+                                   continue: continue_params)
+    end
+  end
+
+  def conflict_resolution_path
+    if conflicts_can_be_resolved_in_ui? && conflicts_can_be_resolved_by?(current_user)
+      conflicts_namespace_project_merge_request_path(project.namespace, project, merge_request)
+    end
+  end
+
+  def target_branch_commits_path
+    if target_branch_exists?
+      namespace_project_commits_path(project.namespace, project, target_branch)
+    end
+  end
+
+  def source_branch_path
+    if source_branch_exists?
+      namespace_project_branch_path(source_project.namespace, source_project, source_branch)
+    end
+  end
+
+  def source_branch_with_namespace_link
+    namespace = source_project_namespace
+    branch = source_branch
+
+    if source_branch_exists?
+      namespace = link_to(namespace, project_path(source_project))
+      branch = link_to(branch, namespace_project_commits_path(source_project.namespace, source_project, source_branch))
+    end
+
+    if for_fork?
+      namespace + ":" + branch
+    else
+      branch
+    end
+  end
+
+  def closing_issues_links
+    markdown issues_sentence(project, closing_issues), pipeline: :gfm, author: author, project: project
+  end
+
+  def mentioned_issues_links
+    mentioned_issues = issues_mentioned_but_not_closing(current_user)
+    markdown issues_sentence(project, mentioned_issues), pipeline: :gfm, author: author, project: project
+  end
+
+  def assign_to_closing_issues_link
+    issues = MergeRequests::AssignIssuesService.new(project,
+                                                    current_user,
+                                                    merge_request: merge_request,
+                                                    closes_issues: closing_issues
+                                                   ).assignable_issues
+    path = assign_related_issues_namespace_project_merge_request_path(project.namespace, project, merge_request)
+    if issues.present?
+      pluralize_this_issue = issues.count > 1 ? "these issues" : "this issue"
+      link_to "Assign yourself to #{pluralize_this_issue}", path, method: :post
+    end
+  end
+
+  def can_revert_on_current_merge_request?
+    user_can_collaborate_with_project? && can_be_reverted?(current_user)
+  end
+
+  def can_cherry_pick_on_current_merge_request?
+    user_can_collaborate_with_project? && can_be_cherry_picked?
+  end
+
+  private
+
+  def closing_issues
+    @closing_issues ||= closes_issues(current_user)
+  end
+
+  def pipeline
+    @pipeline ||= head_pipeline
+  end
+
+  def issues_sentence(project, issues)
+    # Sorting based on the `#123` or `group/project#123` reference will sort
+    # local issues first.
+    issues.map do |issue|
+      issue.to_reference(project)
+    end.sort.to_sentence
+  end
+
+  def user_can_collaborate_with_project?
+    can?(current_user, :push_code, project) ||
+      (current_user && current_user.already_forked?(project))
+  end
+
+  def user_can_fork_project?
+    can?(current_user, :fork_project, project)
+  end
+end
diff --git a/app/serializers/base_serializer.rb b/app/serializers/base_serializer.rb
index 311ee9c96be..4e6c15f673b 100644
--- a/app/serializers/base_serializer.rb
+++ b/app/serializers/base_serializer.rb
@@ -3,8 +3,10 @@ class BaseSerializer
     @request = EntityRequest.new(parameters)
   end
 
-  def represent(resource, opts = {})
-    self.class.entity_class
+  def represent(resource, opts = {}, entity_class = nil)
+    entity_class = entity_class || self.class.entity_class
+
+    entity_class
       .represent(resource, opts.merge(request: @request))
       .as_json
   end
diff --git a/app/serializers/build_action_entity.rb b/app/serializers/build_action_entity.rb
index 75dda1af709..5e99204c658 100644
--- a/app/serializers/build_action_entity.rb
+++ b/app/serializers/build_action_entity.rb
@@ -19,6 +19,6 @@ class BuildActionEntity < Grape::Entity
   alias_method :build, :object
 
   def playable?
-    build.playable? && can?(request.user, :update_build, build)
+    build.playable? && can?(request.current_user, :update_build, build)
   end
 end
diff --git a/app/serializers/build_entity.rb b/app/serializers/build_entity.rb
index 1380b347d8e..e2276808b90 100644
--- a/app/serializers/build_entity.rb
+++ b/app/serializers/build_entity.rb
@@ -26,11 +26,11 @@ class BuildEntity < Grape::Entity
   alias_method :build, :object
 
   def playable?
-    build.playable? && can?(request.user, :update_build, build)
+    build.playable? && can?(request.current_user, :update_build, build)
   end
 
   def detailed_status
-    build.detailed_status(request.user)
+    build.detailed_status(request.current_user)
   end
 
   def path_to(route, build)
diff --git a/app/serializers/environment_entity.rb b/app/serializers/environment_entity.rb
index 4ff15a78115..4e8a3c67b21 100644
--- a/app/serializers/environment_entity.rb
+++ b/app/serializers/environment_entity.rb
@@ -31,7 +31,7 @@ class EnvironmentEntity < Grape::Entity
   end
 
   expose :terminal_path, if: ->(environment, _) { environment.has_terminals? } do |environment|
-    can?(request.user, :admin_environment, environment.project) &&
+    can?(request.current_user, :admin_environment, environment.project) &&
       terminal_namespace_project_environment_path(
         environment.project.namespace,
         environment.project,
diff --git a/app/serializers/event_entity.rb b/app/serializers/event_entity.rb
new file mode 100644
index 00000000000..935d67a4f37
--- /dev/null
+++ b/app/serializers/event_entity.rb
@@ -0,0 +1,4 @@
+class EventEntity < Grape::Entity
+  expose :author, using: UserEntity
+  expose :updated_at
+end
diff --git a/app/serializers/job_group_entity.rb b/app/serializers/job_group_entity.rb
index a4d3737429c..04487e59009 100644
--- a/app/serializers/job_group_entity.rb
+++ b/app/serializers/job_group_entity.rb
@@ -11,6 +11,6 @@ class JobGroupEntity < Grape::Entity
   alias_method :group, :object
 
   def detailed_status
-    group.detailed_status(request.user)
+    group.detailed_status(request.current_user)
   end
 end
diff --git a/app/serializers/merge_request_basic_entity.rb b/app/serializers/merge_request_basic_entity.rb
new file mode 100644
index 00000000000..8771345c135
--- /dev/null
+++ b/app/serializers/merge_request_basic_entity.rb
@@ -0,0 +1,10 @@
+class MergeRequestBasicEntity < Grape::Entity
+  expose :merge_status
+  expose :merge_error
+  expose :state
+  expose :source_branch_exists?, as: :source_branch_exists
+  expose :time_estimate
+  expose :total_time_spent
+  expose :human_time_estimate
+  expose :human_total_time_spent
+end
diff --git a/app/serializers/merge_request_basic_serializer.rb b/app/serializers/merge_request_basic_serializer.rb
new file mode 100644
index 00000000000..cc5c664c8fa
--- /dev/null
+++ b/app/serializers/merge_request_basic_serializer.rb
@@ -0,0 +1,3 @@
+class MergeRequestBasicSerializer < BaseSerializer
+  entity MergeRequestBasicEntity
+end
diff --git a/app/serializers/merge_request_entity.rb b/app/serializers/merge_request_entity.rb
index 453ba52b892..a2542c54f7a 100644
--- a/app/serializers/merge_request_entity.rb
+++ b/app/serializers/merge_request_entity.rb
@@ -1,4 +1,6 @@
 class MergeRequestEntity < IssuableEntity
+  include RequestAwareEntity
+
   expose :assignee_id
   expose :in_progress_merge_commit_sha
   expose :locked_at
@@ -12,4 +14,174 @@ class MergeRequestEntity < IssuableEntity
   expose :source_project_id
   expose :target_branch
   expose :target_project_id
+
+  # Events
+  expose :merge_event, using: EventEntity
+  expose :closed_event, using: EventEntity
+
+  # User entities
+  expose :author, using: UserEntity
+  expose :merge_user, using: UserEntity
+
+  # Diff sha's
+  expose :diff_head_sha do |merge_request|
+    merge_request.diff_head_sha if merge_request.diff_head_commit
+  end
+
+  expose :merge_commit_sha
+  expose :merge_commit_message
+  expose :head_pipeline, with: PipelineEntity, as: :pipeline
+
+  # Booleans
+  expose :work_in_progress?, as: :work_in_progress
+  expose :source_branch_exists?, as: :source_branch_exists
+  expose :mergeable_discussions_state?, as: :mergeable_discussions_state
+  expose :branch_missing?, as: :branch_missing
+  expose :commits_count
+  expose :cannot_be_merged?, as: :has_conflicts
+  expose :can_be_merged?, as: :can_be_merged
+
+  expose :project_archived do |merge_request|
+    merge_request.project.archived?
+  end
+
+  expose :only_allow_merge_if_pipeline_succeeds do |merge_request|
+    merge_request.project.only_allow_merge_if_pipeline_succeeds?
+  end
+
+  # CI related
+  expose :has_ci?, as: :has_ci
+  expose :ci_status do |merge_request|
+    presenter(merge_request).ci_status
+  end
+
+  expose :issues_links do
+    expose :assign_to_closing do |merge_request|
+      presenter(merge_request).assign_to_closing_issues_link
+    end
+
+    expose :closing do |merge_request|
+      presenter(merge_request).closing_issues_links
+    end
+
+    expose :mentioned_but_not_closing do |merge_request|
+      presenter(merge_request).mentioned_issues_links
+    end
+  end
+
+  expose :source_branch_with_namespace_link do |merge_request|
+    presenter(merge_request).source_branch_with_namespace_link
+  end
+
+  expose :source_branch_path do |merge_request|
+    presenter(merge_request).source_branch_path
+  end
+
+  expose :current_user do
+    expose :can_remove_source_branch do |merge_request|
+      merge_request.source_branch_exists? && merge_request.can_remove_source_branch?(current_user)
+    end
+
+    expose :can_revert_on_current_merge_request do |merge_request|
+      presenter(merge_request).can_revert_on_current_merge_request?
+    end
+
+    expose :can_cherry_pick_on_current_merge_request do |merge_request|
+      presenter(merge_request).can_cherry_pick_on_current_merge_request?
+    end
+  end
+
+  # Paths
+  #
+  expose :target_branch_commits_path do |merge_request|
+    presenter(merge_request).target_branch_commits_path
+  end
+
+  expose :conflict_resolution_path do |merge_request|
+    presenter(merge_request).conflict_resolution_path
+  end
+
+  expose :remove_wip_path do |merge_request|
+    presenter(merge_request).remove_wip_path
+  end
+
+  expose :cancel_merge_when_pipeline_succeeds_path do |merge_request|
+    presenter(merge_request).cancel_merge_when_pipeline_succeeds_path
+  end
+
+  expose :create_issue_to_resolve_discussions_path do |merge_request|
+    presenter(merge_request).create_issue_to_resolve_discussions_path
+  end
+
+  expose :merge_path do |merge_request|
+    presenter(merge_request).merge_path
+  end
+
+  expose :cherry_pick_in_fork_path do |merge_request|
+    presenter(merge_request).cherry_pick_in_fork_path
+  end
+
+  expose :revert_in_fork_path do |merge_request|
+    presenter(merge_request).revert_in_fork_path
+  end
+
+  expose :email_patches_path do |merge_request|
+    namespace_project_merge_request_path(merge_request.project.namespace,
+                                         merge_request.project,
+                                         merge_request,
+                                         format: :patch)
+  end
+
+  expose :plain_diff_path do |merge_request|
+    namespace_project_merge_request_path(merge_request.project.namespace,
+                                         merge_request.project,
+                                         merge_request,
+                                         format: :diff)
+  end
+
+  expose :status_path do |merge_request|
+    namespace_project_merge_request_path(merge_request.target_project.namespace,
+                                         merge_request.target_project,
+                                         merge_request,
+                                         format: :json)
+  end
+
+  expose :merge_check_path do |merge_request|
+    merge_check_namespace_project_merge_request_path(merge_request.project.namespace,
+                                                     merge_request.project,
+                                                     merge_request)
+  end
+
+  expose :ci_environments_status_path do |merge_request|
+    ci_environments_status_namespace_project_merge_request_path(merge_request.project.namespace,
+                                                                merge_request.project,
+                                                                merge_request)
+  end
+
+  expose :merge_commit_message_with_description do |merge_request|
+    merge_request.merge_commit_message(include_description: true)
+  end
+
+  expose :diverged_commits_count do |merge_request|
+    if merge_request.open? && merge_request.diverged_from_target_branch?
+      merge_request.diverged_commits_count
+    else
+      0
+    end
+  end
+
+  expose :commit_change_content_path do |merge_request|
+    commit_change_content_namespace_project_merge_request_path(merge_request.project.namespace,
+                                                               merge_request.project,
+                                                               merge_request)
+  end
+
+  private
+
+  delegate :current_user, to: :request
+
+  def presenter(merge_request)
+    @presenters ||= {}
+    @presenters[merge_request] ||= MergeRequestPresenter.new(merge_request, current_user: current_user)
+  end
 end
diff --git a/app/serializers/merge_request_serializer.rb b/app/serializers/merge_request_serializer.rb
index aa6e00dfcb4..f67034ce47a 100644
--- a/app/serializers/merge_request_serializer.rb
+++ b/app/serializers/merge_request_serializer.rb
@@ -1,3 +1,9 @@
 class MergeRequestSerializer < BaseSerializer
-  entity MergeRequestEntity
+  # This overrided method takes care of which entity should be used
+  # to serialize the `merge_request` based on `basic` key in `opts` param.
+  # Hence, `entity` doesn't need to be declared on the class scope.
+  def represent(merge_request, opts = {})
+    entity = opts[:basic] ? MergeRequestBasicEntity : MergeRequestEntity
+    super(merge_request, opts, entity)
+  end
 end
diff --git a/app/serializers/pipeline_entity.rb b/app/serializers/pipeline_entity.rb
index 7eb7aac72eb..51ad0a3f8ba 100644
--- a/app/serializers/pipeline_entity.rb
+++ b/app/serializers/pipeline_entity.rb
@@ -3,6 +3,8 @@ class PipelineEntity < Grape::Entity
 
   expose :id
   expose :user, using: UserEntity
+  expose :active?, as: :active
+  expose :coverage
 
   expose :path do |pipeline|
     namespace_project_pipeline_path(
@@ -69,16 +71,16 @@ class PipelineEntity < Grape::Entity
   alias_method :pipeline, :object
 
   def can_retry?
-    can?(request.user, :update_pipeline, pipeline) &&
+    can?(request.current_user, :update_pipeline, pipeline) &&
       pipeline.retryable?
   end
 
   def can_cancel?
-    can?(request.user, :update_pipeline, pipeline) &&
+    can?(request.current_user, :update_pipeline, pipeline) &&
       pipeline.cancelable?
   end
 
   def detailed_status
-    pipeline.detailed_status(request.user)
+    pipeline.detailed_status(request.current_user)
   end
 end
diff --git a/app/serializers/pipeline_serializer.rb b/app/serializers/pipeline_serializer.rb
index e7a9df8ac4e..e37af63774c 100644
--- a/app/serializers/pipeline_serializer.rb
+++ b/app/serializers/pipeline_serializer.rb
@@ -37,4 +37,11 @@ class PipelineSerializer < BaseSerializer
     data = represent(resource, { only: [{ details: [:status] }] })
     data.dig(:details, :status) || {}
   end
+
+  def represent_stages(resource)
+    return {} unless resource.present?
+
+    data = represent(resource, { only: [{ details: [:stages] }] })
+    data.dig(:details, :stages) || []
+  end
 end
diff --git a/app/serializers/stage_entity.rb b/app/serializers/stage_entity.rb
index 97ced8730ed..cee0089056f 100644
--- a/app/serializers/stage_entity.rb
+++ b/app/serializers/stage_entity.rb
@@ -35,6 +35,6 @@ class StageEntity < Grape::Entity
   alias_method :stage, :object
 
   def detailed_status
-    stage.detailed_status(request.user)
+    stage.detailed_status(request.current_user)
   end
 end
diff --git a/app/services/ci/process_pipeline_service.rb b/app/services/ci/process_pipeline_service.rb
index 33edcd60944..25ba54ffa0d 100644
--- a/app/services/ci/process_pipeline_service.rb
+++ b/app/services/ci/process_pipeline_service.rb
@@ -50,7 +50,7 @@ module Ci
       when 'always'
         %w[success failed skipped]
       when 'manual'
-        %w[success]
+        %w[success skipped]
       else
         []
       end
diff --git a/app/views/layouts/nav/_project.html.haml b/app/views/layouts/nav/_project.html.haml
index cdcac7e4264..e4dfe0c8c08 100644
--- a/app/views/layouts/nav/_project.html.haml
+++ b/app/views/layouts/nav/_project.html.haml
@@ -35,7 +35,7 @@
         = link_to namespace_project_merge_requests_path(@project.namespace, @project), title: 'Merge Requests', class: 'shortcuts-merge_requests' do
           %span
             Merge Requests
-            %span.badge.count.merge_counter= number_with_delimiter(MergeRequestsFinder.new(current_user, project_id: @project.id).execute.opened.count)
+            %span.badge.count.merge_counter.js-merge-counter= number_with_delimiter(MergeRequestsFinder.new(current_user, project_id: @project.id).execute.opened.count)
 
     - if project_nav_tab? :pipelines
       = nav_link(controller: [:pipelines, :builds, :environments, :artifacts]) do
diff --git a/app/views/projects/merge_requests/_show.html.haml b/app/views/projects/merge_requests/_show.html.haml
index 9e306d4543c..25b8567b78f 100644
--- a/app/views/projects/merge_requests/_show.html.haml
+++ b/app/views/projects/merge_requests/_show.html.haml
@@ -1,6 +1,6 @@
 - @content_class = "limit-container-width" unless fluid_layout
-- page_title           "#{@merge_request.title} (#{@merge_request.to_reference})", "Merge Requests"
-- page_description     @merge_request.description
+- page_title "#{@merge_request.title} (#{@merge_request.to_reference})", "Merge Requests"
+- page_description @merge_request.description
 - page_card_attributes @merge_request.card_attributes
 - content_for :page_specific_javascripts do
   = page_specific_javascript_bundle_tag('common_vue')
@@ -11,42 +11,17 @@
 
   .merge-request-details.issuable-details{ data: { id: @merge_request.project.id } }
     = render "projects/merge_requests/show/mr_box"
-    .append-bottom-default.mr-source-target.prepend-top-default
-      - if @merge_request.open?
-        .pull-right
-          - if @merge_request.source_branch_exists?
-            - if koding_enabled? && @repository.koding_yml
-              = link_to koding_project_url(@merge_request.source_project, @merge_request.source_branch, @merge_request.commits.first.short_id), class: "btn inline btn-grouped btn-sm", target: '_blank', rel: 'noopener noreferrer' do
-                Run in IDE (Koding)
-            = link_to "#modal_merge_info", class: "btn inline btn-grouped btn-sm", "data-toggle" => "modal" do
-              Check out branch
-
-          %span.dropdown.inline.prepend-left-5
-            %a.btn.btn-sm.dropdown-toggle{ data: {toggle: :dropdown} }
-              Download as
-              = icon('caret-down')
-            %ul.dropdown-menu.dropdown-menu-align-right
-              %li= link_to "Email Patches", merge_request_path(@merge_request, format: :patch)
-              %li= link_to "Plain Diff",    merge_request_path(@merge_request, format: :diff)
-      .normal
-        %span <b>Request to merge</b>
-        %span.label-branch= source_branch_with_namespace(@merge_request)
-        %span <b>into</b>
-        %span.label-branch
-          = link_to_if @merge_request.target_branch_exists?, @merge_request.target_branch, namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch)
-        - if @merge_request.open? && @merge_request.diverged_from_target_branch?
-          %span (#{pluralize(@merge_request.diverged_commits_count, 'commit')} behind)
 
     - if @merge_request.source_branch_exists?
       = render "projects/merge_requests/show/how_to_merge"
 
-    = render "projects/merge_requests/widget/show.html.haml"
+    :javascript
+      window.gl.mrWidgetData = #{serialize_issuable(@merge_request)}
+
+    #js-vue-mr-widget.mr-widget
 
-    - if @merge_request.source_branch_exists? && @merge_request.mergeable? && @merge_request.can_be_merged_by?(current_user)
-      .merge-manually.light.prepend-top-default
-        You can also accept this merge request manually using the
-        = succeed '.' do
-          = link_to "command line", "#modal_merge_info", class: "how_to_merge_link vlink", title: "How To Merge", "data-toggle" => "modal"
+    - content_for :page_specific_javascripts do
+      = page_specific_javascript_bundle_tag('vue_merge_request_widget')
 
     .content-block.content-block-small.emoji-list-container
       = render 'award_emoji/awards_block', awardable: @merge_request, inline: true
@@ -113,9 +88,7 @@
 
 :javascript
   $(function () {
-    new MergeRequest({
+    window.mergeRequest = new MergeRequest({
       action: "#{controller.action_name}"
     });
   });
-
-  var mrRefreshWidgetUrl = "#{mr_widget_refresh_url(@merge_request)}";
diff --git a/app/views/projects/merge_requests/cancel_merge_when_pipeline_succeeds.js.haml b/app/views/projects/merge_requests/cancel_merge_when_pipeline_succeeds.js.haml
deleted file mode 100644
index eab5be488b5..00000000000
--- a/app/views/projects/merge_requests/cancel_merge_when_pipeline_succeeds.js.haml
+++ /dev/null
@@ -1,2 +0,0 @@
-:plain
-  $('.mr-widget-body').html("#{escape_javascript(render('projects/merge_requests/widget/open/accept'))}");
diff --git a/app/views/projects/merge_requests/merge.js.haml b/app/views/projects/merge_requests/merge.js.haml
deleted file mode 100644
index e632fc681cf..00000000000
--- a/app/views/projects/merge_requests/merge.js.haml
+++ /dev/null
@@ -1,14 +0,0 @@
-- case @status
-- when :success
-  - remove_source_branch = params[:should_remove_source_branch] == '1' || @merge_request.remove_source_branch?
-  :plain
-    merge_request_widget.mergeInProgress(#{remove_source_branch});
-- when :merge_when_pipeline_succeeds
-  :plain
-    $('.mr-widget-body').html("#{escape_javascript(render('projects/merge_requests/widget/open/merge_when_pipeline_succeeds'))}");
-- when :sha_mismatch
-  :plain
-    $('.mr-widget-body').html("#{escape_javascript(render('projects/merge_requests/widget/open/sha_mismatch'))}");
-- else
-  :plain
-    $('.mr-widget-body').html("#{escape_javascript(render('projects/merge_requests/widget/open/reload'))}");
diff --git a/app/views/projects/merge_requests/widget/_closed.html.haml b/app/views/projects/merge_requests/widget/_closed.html.haml
deleted file mode 100644
index 15f47ecf210..00000000000
--- a/app/views/projects/merge_requests/widget/_closed.html.haml
+++ /dev/null
@@ -1,12 +0,0 @@
-.mr-state-widget
-  = render 'projects/merge_requests/widget/heading'
-  .mr-widget-body
-    %h4
-      Closed
-      - if @merge_request.closed_event
-        by #{link_to_member(@project, @merge_request.closed_event.author, avatar: true)}
-        #{time_ago_with_tooltip(@merge_request.closed_event.created_at)}
-    %p
-      = succeed '.' do
-        The changes were not merged into
-        %span.label-branch= @merge_request.target_branch
diff --git a/app/views/projects/merge_requests/widget/_commit_change_content.html.haml b/app/views/projects/merge_requests/widget/_commit_change_content.html.haml
new file mode 100644
index 00000000000..ad0ce7bf501
--- /dev/null
+++ b/app/views/projects/merge_requests/widget/_commit_change_content.html.haml
@@ -0,0 +1,4 @@
+- if @merge_request.can_be_reverted?(current_user)
+  = render "projects/commit/change", type: 'revert', commit: @merge_request.merge_commit, title: @merge_request.title
+- if @merge_request.can_be_cherry_picked?
+  = render "projects/commit/change", type: 'cherry-pick', commit: @merge_request.merge_commit, title: @merge_request.title
diff --git a/app/views/projects/merge_requests/widget/_heading.html.haml b/app/views/projects/merge_requests/widget/_heading.html.haml
deleted file mode 100644
index 1298376ac25..00000000000
--- a/app/views/projects/merge_requests/widget/_heading.html.haml
+++ /dev/null
@@ -1,50 +0,0 @@
-- if @pipeline
-  .mr-widget-heading
-    - %w[success success_with_warnings skipped manual canceled failed running pending].each do |status|
-      .ci_widget{ class: "ci-#{status}", style: ("display:none" unless @pipeline.status == status) }
-        %div{ class: "ci-status-icon ci-status-icon-#{status}" }
-          = link_to namespace_project_pipeline_path(@pipeline.project.namespace, @pipeline.project, @pipeline.id), class: 'icon-link' do
-            = ci_icon_for_status(status)
-        %span
-          Pipeline
-          = link_to "##{@pipeline.id}", namespace_project_pipeline_path(@pipeline.project.namespace, @pipeline.project, @pipeline.id), class: 'pipeline'
-          = ci_label_for_status(status)
-        - if @pipeline.stages.any?
-          .mr-widget-pipeline-graph
-            = render 'shared/mini_pipeline_graph', pipeline: @pipeline, klass: 'js-pipeline-inline-mr-widget-graph'
-        %span
-          for
-          = succeed "." do
-            = link_to @pipeline.short_sha, namespace_project_commit_path(@merge_request.source_project.namespace, @merge_request.source_project, @pipeline.sha), class: "monospace js-commit-link"
-        %span.ci-coverage
-
-- elsif @merge_request.has_ci?
-  -# Compatibility with old CI integrations (ex jenkins) when you request status from CI server via AJAX
-  -# TODO, remove in later versions when services like Jenkins will set CI status via Commit status API
-  .mr-widget-heading
-    - %w[success skipped canceled failed running pending].each do |status|
-      .ci_widget{ class: "ci-#{status} ci-status-icon-#{status}", style: "display:none" }
-        = ci_icon_for_status(status)
-        %span
-          CI job
-          = ci_label_for_status(status)
-          for
-        - commit = @merge_request.diff_head_commit
-        = succeed "." do
-          = link_to commit.short_id, namespace_project_commit_path(@merge_request.source_project.namespace, @merge_request.source_project, commit), class: "monospace"
-        %span.ci-coverage
-
-    .ci_widget
-      = icon("spinner spin")
-      Checking CI status for #{@merge_request.diff_head_commit.short_id}&hellip;
-
-    .ci_widget.ci-not_found{ style: "display:none" }
-      = icon("times-circle")
-      Could not find CI status for #{@merge_request.diff_head_commit.short_id}.
-
-    .ci_widget.ci-error{ style: "display:none" }
-      = icon("times-circle")
-      Could not connect to the CI server. Please check your settings and try again.
-
-.js-success-icon.hidden
-  = ci_icon_for_status('success')
diff --git a/app/views/projects/merge_requests/widget/_locked.html.haml b/app/views/projects/merge_requests/widget/_locked.html.haml
deleted file mode 100644
index 78d0783cba0..00000000000
--- a/app/views/projects/merge_requests/widget/_locked.html.haml
+++ /dev/null
@@ -1,9 +0,0 @@
-.mr-state-widget
-  = render 'projects/merge_requests/widget/heading'
-  .mr-widget-body
-    %h4
-      = icon("spinner spin")
-      Merge in progress&hellip;
-    %p
-      This merge request is in the process of being merged, during which time it is locked and cannot be closed.
-
diff --git a/app/views/projects/merge_requests/widget/_merged.html.haml b/app/views/projects/merge_requests/widget/_merged.html.haml
deleted file mode 100644
index adc3bbc37f3..00000000000
--- a/app/views/projects/merge_requests/widget/_merged.html.haml
+++ /dev/null
@@ -1,52 +0,0 @@
-.mr-state-widget
-  = render 'projects/merge_requests/widget/heading'
-  .mr-widget-body
-    %h4
-      Merged
-      - if @merge_request.merge_event
-        by #{link_to_member(@project, @merge_request.merge_event.author, avatar: true)}
-        #{time_ago_with_tooltip(@merge_request.merge_event.created_at)}
-    - if !@merge_request.source_branch_exists? || params[:deleted_source_branch]
-      .remove-message-pipes
-        %ul
-          %li
-            %span
-              The changes were merged into
-              #{link_to @merge_request.target_branch, namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch), class: "label-branch"}.
-          %li
-            %span
-              The source branch has been removed.
-      = render 'projects/merge_requests/widget/merged_buttons'
-    - elsif @merge_request.can_remove_source_branch?(current_user)
-      .remove_source_branch_widget.remove-message-pipes
-        %ul
-          %li
-            %span
-              The changes were merged into
-              #{link_to @merge_request.target_branch, namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch), class: "label-branch"}.
-          %li
-            %span
-              You can remove the source branch now.
-        = render 'projects/merge_requests/widget/merged_buttons', source_branch_exists: true
-      .remove_source_branch_widget.failed.remove-message-pipes.hide
-        %ul
-          %li
-            %span
-              Failed to remove source branch '#{@merge_request.source_branch}'.
-      .remove_source_branch_in_progress.remove-message-pipes.hide
-        %ul
-          %li
-            %span
-              = icon('spinner spin')
-              Removing source branch '#{@merge_request.source_branch}'.
-          %li
-            %span
-              Please wait, this page will be automatically reloaded.
-    - else
-      .remove-message-pipes
-        %ul
-          %li
-            %span
-              The changes were merged into
-              #{link_to @merge_request.target_branch, namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch), class: "label-branch"}.
-        = render 'projects/merge_requests/widget/merged_buttons'
diff --git a/app/views/projects/merge_requests/widget/_merged_buttons.haml b/app/views/projects/merge_requests/widget/_merged_buttons.haml
deleted file mode 100644
index a0f54bd28ec..00000000000
--- a/app/views/projects/merge_requests/widget/_merged_buttons.haml
+++ /dev/null
@@ -1,14 +0,0 @@
-- can_remove_source_branch = local_assigns.fetch(:source_branch_exists, false) && @merge_request.can_remove_source_branch?(current_user)
-- mr_can_be_reverted = @merge_request.can_be_reverted?(current_user)
-- mr_can_be_cherry_picked = @merge_request.can_be_cherry_picked?
-
-- if can_remove_source_branch || mr_can_be_reverted || mr_can_be_cherry_picked
-  .clearfix.merged-buttons
-    - if can_remove_source_branch
-      = link_to namespace_project_branch_path(@merge_request.source_project.namespace, @merge_request.source_project, @merge_request.source_branch), remote: true, method: :delete, class: "btn btn-default remove_source_branch" do
-        = icon('trash-o')
-        Remove source branch
-    - if mr_can_be_reverted
-      = revert_commit_link(@merge_request.merge_commit, namespace_project_merge_request_path(@project.namespace, @project, @merge_request), btn_class: "close")
-    - if mr_can_be_cherry_picked
-      = cherry_pick_commit_link(@merge_request.merge_commit, namespace_project_merge_request_path(@project.namespace, @project, @merge_request), btn_class: "default")
diff --git a/app/views/projects/merge_requests/widget/_open.html.haml b/app/views/projects/merge_requests/widget/_open.html.haml
deleted file mode 100644
index 0872a1a0503..00000000000
--- a/app/views/projects/merge_requests/widget/_open.html.haml
+++ /dev/null
@@ -1,49 +0,0 @@
-.mr-state-widget
-  = render 'projects/merge_requests/widget/heading'
-  .mr-widget-body
-    -# After conflicts are resolved, the user is redirected back to the MR page.
-    -# There is a short window before background workers run and GitLab processes
-    -# the new push and commits, during which it will think the conflicts still exist.
-    -# We send this param to get the widget to treat the MR as having no more conflicts.
-    - resolved_conflicts = params[:resolved_conflicts]
-
-    - if @project.archived?
-      = render 'projects/merge_requests/widget/open/archived'
-    - elsif @merge_request.branch_missing?
-      = render 'projects/merge_requests/widget/open/missing_branch'
-    - elsif @merge_request.has_no_commits?
-      = render 'projects/merge_requests/widget/open/nothing'
-    - elsif @merge_request.unchecked?
-      = render 'projects/merge_requests/widget/open/check'
-    - elsif @merge_request.cannot_be_merged? && !resolved_conflicts
-      = render 'projects/merge_requests/widget/open/conflicts'
-    - elsif @merge_request.work_in_progress?
-      = render 'projects/merge_requests/widget/open/wip'
-    - elsif @merge_request.merge_when_pipeline_succeeds? && @merge_request.merge_error.present?
-      = render 'projects/merge_requests/widget/open/error'
-    - elsif @merge_request.merge_when_pipeline_succeeds?
-      = render 'projects/merge_requests/widget/open/merge_when_pipeline_succeeds'
-    - elsif !@merge_request.can_be_merged_by?(current_user)
-      = render 'projects/merge_requests/widget/open/not_allowed'
-    - elsif !@merge_request.mergeable_ci_state? && (@pipeline.failed? || @pipeline.canceled?)
-      = render 'projects/merge_requests/widget/open/build_failed'
-    - elsif !@merge_request.mergeable_discussions_state?
-      = render 'projects/merge_requests/widget/open/unresolved_discussions'
-    - elsif @pipeline&.blocked?
-      = render 'projects/merge_requests/widget/open/manual'
-    - elsif @merge_request.can_be_merged? || resolved_conflicts
-      = render 'projects/merge_requests/widget/open/accept'
-
-  - if mr_closes_issues.present? || mr_issues_mentioned_but_not_closing.present?
-    .mr-widget-footer
-      %span
-        = icon('check')
-        - if mr_closes_issues.present?
-          Accepting this merge request will close #{"issue".pluralize(mr_closes_issues.size)}
-          = succeed '.' do
-            != markdown issues_sentence(mr_closes_issues), pipeline: :gfm, author: @merge_request.author
-          = mr_assign_issues_link
-        - if mr_issues_mentioned_but_not_closing.present?
-          #{"Issue".pluralize(mr_issues_mentioned_but_not_closing.size)}
-          != markdown issues_sentence(mr_issues_mentioned_but_not_closing), pipeline: :gfm, author: @merge_request.author
-          #{mr_issues_mentioned_but_not_closing.size > 1 ? 'are' : 'is'} mentioned but will not be closed.
diff --git a/app/views/projects/merge_requests/widget/_show.html.haml b/app/views/projects/merge_requests/widget/_show.html.haml
deleted file mode 100644
index c716b69b35b..00000000000
--- a/app/views/projects/merge_requests/widget/_show.html.haml
+++ /dev/null
@@ -1,40 +0,0 @@
-- if @merge_request.open?
-  = render 'projects/merge_requests/widget/open'
-- elsif @merge_request.merged?
-  = render 'projects/merge_requests/widget/merged'
-- elsif @merge_request.closed?
-  = render 'projects/merge_requests/widget/closed'
-- elsif @merge_request.locked?
-  = render 'projects/merge_requests/widget/locked'
-
-:javascript
-  var opts = {
-    merge_check_url: "#{merge_check_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)}",
-    check_enable: #{@merge_request.unchecked? ? "true" : "false"},
-    ci_status_url: "#{ci_status_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)}",
-    pipeline_status_url: "#{pipeline_status_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)}",
-    ci_environments_status_url: "#{ci_environments_status_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)}",
-    gitlab_icon: "#{asset_path 'gitlab_logo.png'}",
-    ci_status: "#{@merge_request.head_pipeline ? @merge_request.head_pipeline.status : ''}",
-    ci_message: {
-      normal: "Pipeline {{status}} for \"{{title}}\"",
-      preparing: "{{status}} pipeline for \"{{title}}\""
-    },
-    ci_enable: #{@project.ci_service ? "true" : "false"},
-    ci_title: {
-      preparing: "{{status}} pipeline",
-      normal: "Pipeline {{status}}"
-    },
-    ci_sha: "#{@merge_request.head_pipeline ? @merge_request.head_pipeline.short_sha : ''}",
-    ci_pipeline: #{@merge_request.head_pipeline.try(:id).to_json},
-    commits_path: "#{project_commits_path(@project)}",
-    pipeline_path: "#{project_pipelines_path(@project)}",
-    pipelines_path: "#{pipelines_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)}"
-  };
-
-  if (typeof merge_request_widget !== 'undefined') {
-    merge_request_widget.cancelPolling();
-    merge_request_widget.clearEventListeners();
-  }
-
-  merge_request_widget = new window.gl.MergeRequestWidget(opts);
diff --git a/app/views/projects/merge_requests/widget/open/_accept.html.haml b/app/views/projects/merge_requests/widget/open/_accept.html.haml
deleted file mode 100644
index 4cbd22150c7..00000000000
--- a/app/views/projects/merge_requests/widget/open/_accept.html.haml
+++ /dev/null
@@ -1,50 +0,0 @@
-- content_for :page_specific_javascripts do
-  = page_specific_javascript_bundle_tag('merge_request_widget')
-
-= form_for [:merge, @project.namespace.becomes(Namespace), @project, @merge_request], remote: true, method: :post, html: { class: 'accept-mr-form js-quick-submit js-requires-input' } do |f|
-  = hidden_field_tag :authenticity_token, form_authenticity_token
-  = hidden_field_tag :sha, @merge_request.diff_head_sha
-  .accept-merge-holder.clearfix.js-toggle-container
-    .clearfix
-      .accept-action
-        - if @pipeline && @pipeline.active?
-          %span.btn-group
-            = button_tag class: "btn btn-info js-merge-when-pipeline-succeeds-button merge-when-pipeline-succeeds" do
-              Merge when pipeline succeeds
-            - unless @project.only_allow_merge_if_pipeline_succeeds?
-              = button_tag class: "btn btn-info dropdown-toggle", 'data-toggle' => 'dropdown' do
-                = icon('caret-down')
-                %span.sr-only
-                  Select merge moment
-              %ul.js-merge-dropdown.dropdown-menu.dropdown-menu-right{ role: 'menu' }
-                %li
-                  = link_to "#", class: "merge-when-pipeline-succeeds" do
-                    = icon('check fw')
-                    Merge when pipeline succeeds
-                %li
-                  = link_to "#", class: "accept-merge-request" do
-                    = icon('warning fw')
-                    Merge immediately
-        - else
-          = f.button class: "btn btn-grouped js-merge-button accept-merge-request" do
-            Accept merge request
-      - if @merge_request.force_remove_source_branch?
-        .accept-control
-          The source branch will be removed.
-      - elsif @merge_request.can_remove_source_branch?(current_user)
-        .accept-control.checkbox
-          = label_tag :should_remove_source_branch, class: "merge-param-checkbox" do
-            = check_box_tag :should_remove_source_branch
-            Remove source branch
-      .accept-control
-        %button.modify-merge-commit-link.js-toggle-button{ type: "button" }
-          = icon('edit')
-          Modify commit message
-    .js-toggle-content.hide.prepend-top-default
-      = render 'shared/commit_message_container', params: params,
-          message_with_description: @merge_request.merge_commit_message(include_description: true),
-          message_without_description: @merge_request.merge_commit_message,
-          text: @merge_request.merge_commit_message,
-          rows: 14, hint: true
-
-    = hidden_field_tag :merge_when_pipeline_succeeds, "", autocomplete: "off"
diff --git a/app/views/projects/merge_requests/widget/open/_archived.html.haml b/app/views/projects/merge_requests/widget/open/_archived.html.haml
deleted file mode 100644
index 0d61e56d8fb..00000000000
--- a/app/views/projects/merge_requests/widget/open/_archived.html.haml
+++ /dev/null
@@ -1,4 +0,0 @@
-%h4
-  Project is archived
-%p
-  This merge request cannot be merged because archived projects cannot be written to.
diff --git a/app/views/projects/merge_requests/widget/open/_build_failed.html.haml b/app/views/projects/merge_requests/widget/open/_build_failed.html.haml
deleted file mode 100644
index 3979d5fa8ed..00000000000
--- a/app/views/projects/merge_requests/widget/open/_build_failed.html.haml
+++ /dev/null
@@ -1,6 +0,0 @@
-%h4
-  = icon('exclamation-triangle')
-  The pipeline for this merge request failed
-
-%p
-  Please retry the job or push a new commit to fix the failure.
diff --git a/app/views/projects/merge_requests/widget/open/_check.html.haml b/app/views/projects/merge_requests/widget/open/_check.html.haml
deleted file mode 100644
index 909dc52fc06..00000000000
--- a/app/views/projects/merge_requests/widget/open/_check.html.haml
+++ /dev/null
@@ -1,6 +0,0 @@
-- content_for :page_specific_javascripts do
-  = page_specific_javascript_bundle_tag('merge_request_widget')
-
-%strong
-  = icon("spinner spin")
-  Checking ability to merge automatically&hellip;
diff --git a/app/views/projects/merge_requests/widget/open/_conflicts.html.haml b/app/views/projects/merge_requests/widget/open/_conflicts.html.haml
deleted file mode 100644
index 621ee313026..00000000000
--- a/app/views/projects/merge_requests/widget/open/_conflicts.html.haml
+++ /dev/null
@@ -1,27 +0,0 @@
-- can_resolve = @merge_request.conflicts_can_be_resolved_by?(current_user)
-- can_resolve_in_ui = @merge_request.conflicts_can_be_resolved_in_ui?
-- can_merge = @merge_request.can_be_merged_via_command_line_by?(current_user)
-
-%h4.has-conflicts
-  %p
-    = icon("exclamation-triangle")
-    This merge request contains merge conflicts
-
-.remove-message-pipes
-  %ul
-    %li
-      %span
-        To merge this request, resolve these conflicts
-        - if can_resolve && !can_resolve_in_ui
-          locally
-        or
-        - unless can_merge
-          ask someone with write access to this repository to
-        merge it locally.
-
-- if (can_resolve && can_resolve_in_ui) || can_merge
-  .merged-buttons.clearfix
-    - if can_resolve && can_resolve_in_ui
-      = link_to "Resolve conflicts", conflicts_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), class: "btn"
-    - if can_merge
-      = link_to "Merge locally", "#modal_merge_info", class: "btn how_to_merge_link vlink", "data-toggle" => "modal"
diff --git a/app/views/projects/merge_requests/widget/open/_manual.html.haml b/app/views/projects/merge_requests/widget/open/_manual.html.haml
deleted file mode 100644
index 9078b7e21dd..00000000000
--- a/app/views/projects/merge_requests/widget/open/_manual.html.haml
+++ /dev/null
@@ -1,4 +0,0 @@
-%h4
-  Pipeline blocked
-%p
-  The pipeline for this merge request requires a manual action to proceed.
diff --git a/app/views/projects/merge_requests/widget/open/_merge_when_pipeline_succeeds.html.haml b/app/views/projects/merge_requests/widget/open/_merge_when_pipeline_succeeds.html.haml
deleted file mode 100644
index 76cc1ecd8a5..00000000000
--- a/app/views/projects/merge_requests/widget/open/_merge_when_pipeline_succeeds.html.haml
+++ /dev/null
@@ -1,33 +0,0 @@
-- content_for :page_specific_javascripts do
-  = page_specific_javascript_bundle_tag('merge_request_widget')
-
-%h4
-  Set by #{link_to_member(@project, @merge_request.merge_user, avatar: true)}
-  to be merged automatically when the pipeline succeeds.
-.remove-message-pipes
-  %ul
-    %li
-      %span
-        = succeed '.' do
-          The changes will be merged into #{link_to @merge_request.target_branch, namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch), class: "label-branch"}
-        - if @merge_request.remove_source_branch?
-          %li
-            %span
-              The source branch will be removed.
-        - else
-          %li
-            %span
-              The source branch will not be removed.
-
-  - remove_source_branch_button = !@merge_request.remove_source_branch? && @merge_request.can_remove_source_branch?(current_user) && @merge_request.merge_user == current_user
-  - user_can_cancel_automatic_merge = @merge_request.can_cancel_merge_when_pipeline_succeeds?(current_user)
-  - if remove_source_branch_button || user_can_cancel_automatic_merge
-    .clearfix.prepend-top-10
-      - if remove_source_branch_button
-        = link_to merge_namespace_project_merge_request_path(@merge_request.target_project.namespace, @merge_request.target_project, @merge_request, merge_params(@merge_request)), remote: true, method: :post, class: "btn btn-grouped btn-primary btn-sm remove_source_branch" do
-          = icon('times')
-          Remove source branch when merged
-
-      - if user_can_cancel_automatic_merge
-        = link_to cancel_merge_when_pipeline_succeeds_namespace_project_merge_request_path(@merge_request.target_project.namespace, @merge_request.target_project, @merge_request), remote: true, method: :post, class: "btn btn-grouped btn-sm" do
-          Cancel automatic merge
diff --git a/app/views/projects/merge_requests/widget/open/_missing_branch.html.haml b/app/views/projects/merge_requests/widget/open/_missing_branch.html.haml
deleted file mode 100644
index c9f07629493..00000000000
--- a/app/views/projects/merge_requests/widget/open/_missing_branch.html.haml
+++ /dev/null
@@ -1,16 +0,0 @@
-- unless @merge_request.source_branch_exists?
-  %h4
-    = icon("exclamation-triangle")
-    Source branch
-    %span.label-branch= source_branch_with_namespace(@merge_request)
-    does not exist
-  %p
-    Please restore the source branch or close this merge request and open a new merge request with a different source branch.
-- else
-  %h4
-    = icon("exclamation-triangle")
-    Target branch
-    %span.label-branch= @merge_request.target_branch
-    does not exist
-  %p
-    Please restore the target branch or use a different target branch.
diff --git a/app/views/projects/merge_requests/widget/open/_not_allowed.html.haml b/app/views/projects/merge_requests/widget/open/_not_allowed.html.haml
deleted file mode 100644
index 57ce1959021..00000000000
--- a/app/views/projects/merge_requests/widget/open/_not_allowed.html.haml
+++ /dev/null
@@ -1,6 +0,0 @@
-%h4
-  Ready to be merged automatically
-%p
-  Ask someone with write access to this repository to merge this request.
-  - if @merge_request.force_remove_source_branch?
-    The source branch will be removed.
diff --git a/app/views/projects/merge_requests/widget/open/_nothing.html.haml b/app/views/projects/merge_requests/widget/open/_nothing.html.haml
deleted file mode 100644
index 7af8c01c134..00000000000
--- a/app/views/projects/merge_requests/widget/open/_nothing.html.haml
+++ /dev/null
@@ -1,8 +0,0 @@
-%h4
-  = icon("exclamation-triangle")
-  Nothing to merge from
-  %span.label-branch= source_branch_with_namespace(@merge_request)
-  into
-  %span.label-branch= @merge_request.target_branch
-%p
-  Please push new commits to the source branch or use a different target branch.
diff --git a/app/views/projects/merge_requests/widget/open/_reload.html.haml b/app/views/projects/merge_requests/widget/open/_reload.html.haml
deleted file mode 100644
index acfc31725eb..00000000000
--- a/app/views/projects/merge_requests/widget/open/_reload.html.haml
+++ /dev/null
@@ -1,6 +0,0 @@
-%h4
-  = icon("exclamation-triangle")
-  This merge request failed to be merged automatically
-
-%p
-  Please reload the page to find out the reason.
diff --git a/app/views/projects/merge_requests/widget/open/_sha_mismatch.html.haml b/app/views/projects/merge_requests/widget/open/_sha_mismatch.html.haml
deleted file mode 100644
index 499624f8dd8..00000000000
--- a/app/views/projects/merge_requests/widget/open/_sha_mismatch.html.haml
+++ /dev/null
@@ -1,6 +0,0 @@
-%h4
-  = icon("exclamation-triangle")
-  This merge request has received new commits since the page was loaded.
-
-%p
-  Please reload the page to review the new commits before merging.
diff --git a/app/views/projects/merge_requests/widget/open/_unresolved_discussions.html.haml b/app/views/projects/merge_requests/widget/open/_unresolved_discussions.html.haml
deleted file mode 100644
index ec9346ce89b..00000000000
--- a/app/views/projects/merge_requests/widget/open/_unresolved_discussions.html.haml
+++ /dev/null
@@ -1,10 +0,0 @@
-%h4
-  = icon('exclamation-triangle')
-  This merge request has unresolved discussions
-
-%p
-  Please resolve these discussions
-  - if @project.issues_enabled? && can?(current_user, :create_issue, @project)
-    or
-    = link_to "open an issue to resolve them later", new_namespace_project_issue_path(@project.namespace, @project, merge_request_to_resolve_discussions_of: @merge_request.iid)
-  to allow this merge request to be merged.
diff --git a/app/views/projects/merge_requests/widget/open/_wip.html.haml b/app/views/projects/merge_requests/widget/open/_wip.html.haml
deleted file mode 100644
index c296422a9cf..00000000000
--- a/app/views/projects/merge_requests/widget/open/_wip.html.haml
+++ /dev/null
@@ -1,11 +0,0 @@
-%h4
-  This merge request is currently a Work In Progress
-
-- if can?(current_user, :update_merge_request, @merge_request)
-  %p
-    When this merge request is ready,
-    = link_to remove_wip_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), method: :post do
-      remove the
-      %code WIP:
-      prefix from the title
-    to allow it to be merged.
diff --git a/app/views/shared/issuable/form/_merge_params.html.haml b/app/views/shared/issuable/form/_merge_params.html.haml
index 03309722326..d23f79be2be 100644
--- a/app/views/shared/issuable/form/_merge_params.html.haml
+++ b/app/views/shared/issuable/form/_merge_params.html.haml
@@ -5,12 +5,3 @@
 
 -# This check is duplicated below, to avoid conflicts with EE.
 - return unless issuable.can_remove_source_branch?(current_user)
-
-.form-group
-  .col-sm-10.col-sm-offset-2
-    - if issuable.can_remove_source_branch?(current_user)
-      .checkbox
-        = label_tag 'merge_request[force_remove_source_branch]' do
-          = hidden_field_tag 'merge_request[force_remove_source_branch]', '0', id: nil
-          = check_box_tag 'merge_request[force_remove_source_branch]', '1', issuable.force_remove_source_branch?
-          Remove source branch when merge request is accepted.
diff --git a/changelogs/unreleased/fix-gb-fix-skipped-manual-actions.yml b/changelogs/unreleased/fix-gb-fix-skipped-manual-actions.yml
new file mode 100644
index 00000000000..d8d4c668a44
--- /dev/null
+++ b/changelogs/unreleased/fix-gb-fix-skipped-manual-actions.yml
@@ -0,0 +1,4 @@
+---
+title: Fix skipped manual actions problem when processing the pipeline
+merge_request: 11164
+author:
diff --git a/changelogs/unreleased/mrchrisw-fix-slack-notify.yml b/changelogs/unreleased/mrchrisw-fix-slack-notify.yml
new file mode 100644
index 00000000000..bb45a117be6
--- /dev/null
+++ b/changelogs/unreleased/mrchrisw-fix-slack-notify.yml
@@ -0,0 +1,4 @@
+---
+title: Fix notify_only_default_branch check for Slack service
+merge_request:
+author:
diff --git a/changelogs/unreleased/up-arrow-focus-discussion-comment.yml b/changelogs/unreleased/up-arrow-focus-discussion-comment.yml
new file mode 100644
index 00000000000..5457dab6d3d
--- /dev/null
+++ b/changelogs/unreleased/up-arrow-focus-discussion-comment.yml
@@ -0,0 +1,4 @@
+---
+title: Fix up arrow not editing last discussion comment
+merge_request:
+author:
diff --git a/config/routes/project.rb b/config/routes/project.rb
index 7f6e5447b19..a6c104c2d3f 100644
--- a/config/routes/project.rb
+++ b/config/routes/project.rb
@@ -75,10 +75,9 @@ constraints(ProjectUrlConstrainer.new) do
           get :conflict_for_path
           get :pipelines
           get :merge_check
+          get :commit_change_content
           post :merge
-          get :merge_widget_refresh
           post :cancel_merge_when_pipeline_succeeds
-          get :ci_status
           get :pipeline_status
           get :ci_environments_status
           post :toggle_subscription
@@ -146,7 +145,11 @@ constraints(ProjectUrlConstrainer.new) do
           get :folder, path: 'folders/*id', constraints: { format: /(html|json)/ }
         end
 
-        resources :deployments, only: [:index]
+        resources :deployments, only: [:index] do
+          member do
+            get :metrics
+          end
+        end
       end
 
       resource :cycle_analytics, only: [:show]
diff --git a/config/webpack.config.js b/config/webpack.config.js
index cb6bd949ddb..7e413c8493e 100644
--- a/config/webpack.config.js
+++ b/config/webpack.config.js
@@ -42,7 +42,6 @@ var config = {
     locale:               './locale/index.js',
     main:                 './main.js',
     merge_conflicts:      './merge_conflicts/merge_conflicts_bundle.js',
-    merge_request_widget: './merge_request_widget/ci_bundle.js',
     monitoring:           './monitoring/monitoring_bundle.js',
     network:              './network/network_bundle.js',
     notebook_viewer:      './blob/notebook_viewer.js',
@@ -63,6 +62,7 @@ var config = {
     u2f:                  ['vendor/u2f'],
     users:                './users/users_bundle.js',
     raven:                './raven/index.js',
+    vue_merge_request_widget: './vue_merge_request_widget/index.js',
   },
 
   output: {
diff --git a/doc/user/project/integrations/prometheus.md b/doc/user/project/integrations/prometheus.md
index a74014b6b2f..b71d6981d1e 100644
--- a/doc/user/project/integrations/prometheus.md
+++ b/doc/user/project/integrations/prometheus.md
@@ -169,6 +169,14 @@ Clicking on the Monitoring button will display a new page, showing up to the las
 8 hours of performance data. It may take a minute or two for data to appear
 after initial deployment.
 
+## Determining performance impact of a merge
+
+> [Introduced][ce-10408] in GitLab 9.1.
+
+After a merge request has been approved, a sparkline will appear on the merge request page displaying the average memory usage of the application. The sparkline includes thirty minutes of data prior to the merge, a dot to indicate the merge itself, and then will begin capturing thirty minutes of data after the merge.
+
+This sparkline serves as a quick indicator of the impact on memory consumption of the recently merged changes. If there is a problem, action can then be taken to troubleshoot or revert the merge. 
+
 ## Troubleshooting
 
 If the "Attempting to load performance data" screen continues to appear, it could be due to:
@@ -189,4 +197,5 @@ If the "Attempting to load performance data" screen continues to appear, it coul
 [gitlab.com-ip-range]: https://gitlab.com/gitlab-com/infrastructure/issues/434
 [ci-environment-slug]: https://docs.gitlab.com/ce/ci/variables/#predefined-variables-environment-variables
 [ce-8935]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8935
+[ce-10408]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10408
 [promgldocs]: ../../../administration/monitoring/prometheus/index.md
diff --git a/features/project/commits/revert.feature b/features/project/commits/revert.feature
index 7a2effafe03..7ee1d717d80 100644
--- a/features/project/commits/revert.feature
+++ b/features/project/commits/revert.feature
@@ -5,12 +5,14 @@ Feature: Revert Commits
     And I own a project
     And I visit my project's commits page
 
+  @javascript
   Scenario: I revert a commit
     Given I click on commit link
     And I click on the revert button
     And I revert the changes directly
     Then I should see the revert commit notice
 
+  @javascript
   Scenario: I revert a commit that was previously reverted
     Given I click on commit link
     And I click on the revert button
@@ -21,6 +23,7 @@ Feature: Revert Commits
     And I revert the changes directly
     Then I should see a revert error
 
+  @javascript
   Scenario: I revert a commit in a new merge request
     Given I click on commit link
     And I click on the revert button
diff --git a/features/project/merge_requests.feature b/features/project/merge_requests.feature
index bcde497553b..a8c528d3d6f 100644
--- a/features/project/merge_requests.feature
+++ b/features/project/merge_requests.feature
@@ -26,11 +26,13 @@ Feature: Project Merge Requests
     When I visit project "Shop" merge requests page
     Then I should see "feature_conflict" branch
 
+  @javascript
   Scenario: I should not see the numbers of diverged commits if the branch is rebased on the target
     Given project "Shop" have "Bug NS-07" open merge request with rebased branch
     When I visit merge request page "Bug NS-07"
     Then I should not see the diverged commits count
 
+  @javascript
   Scenario: I should see the numbers of diverged commits if the branch diverged from the target
     Given project "Shop" have "Bug NS-08" open merge request with diverged branch
     When I visit merge request page "Bug NS-08"
@@ -46,21 +48,25 @@ Feature: Project Merge Requests
     Then I should see "Feature NS-03" in merge requests
     And I should see "Bug NS-04" in merge requests
 
+  @javascript
   Scenario: I visit an open merge request page
     Given I click link "Bug NS-04"
     Then I should see merge request "Bug NS-04"
 
+  @javascript
   Scenario: I visit a merged merge request page
     Given project "Shop" have "Feature NS-05" merged merge request
     And I click link "Merged"
     And I click link "Feature NS-05"
     Then I should see merge request "Feature NS-05"
 
+  @javascript
   Scenario: I close merge request page
     Given I click link "Bug NS-04"
     And I click link "Close"
     Then I should see closed merge request "Bug NS-04"
 
+  @javascript
   Scenario: I reopen merge request page
     Given I click link "Bug NS-04"
     And I click link "Close"
@@ -176,6 +182,7 @@ Feature: Project Merge Requests
 
   # Markdown
 
+  @javascript
   Scenario: Headers inside the description should have ids generated for them.
     When I visit merge request page "Bug NS-04"
     Then Header "Description header" should have correct id and link
diff --git a/features/project/merge_requests/accept.feature b/features/project/merge_requests/accept.feature
index 330ec8ae0fe..c45ed9ea68b 100644
--- a/features/project/merge_requests/accept.feature
+++ b/features/project/merge_requests/accept.feature
@@ -7,7 +7,6 @@ Feature: Project Merge Requests Acceptance
   @javascript
   Scenario: Accepting the Merge Request and removing the source branch
     Given I am on the Merge Request detail page
-    When I click on "Remove source branch" option
     And I click on Accept Merge Request
     Then I should see merge request merged
     And I should not see the Remove Source Branch button
@@ -15,7 +14,6 @@ Feature: Project Merge Requests Acceptance
   @javascript
   Scenario: Accepting the Merge Request when URL has an anchor
     Given I am on the Merge Request detail with note anchor page
-    When I click on "Remove source branch" option
     And I click on Accept Merge Request
     Then I should see merge request merged
     And I should not see the Remove Source Branch button
@@ -23,6 +21,7 @@ Feature: Project Merge Requests Acceptance
   @javascript
   Scenario: Accepting the Merge Request without removing the source branch
     Given I am on the Merge Request detail page
+    When I click on "Remove source branch" option
     When I click on Accept Merge Request
     Then I should see merge request merged
     And I should see the Remove Source Branch button
diff --git a/features/steps/project/commits/revert.rb b/features/steps/project/commits/revert.rb
index c9746407344..114de129d19 100644
--- a/features/steps/project/commits/revert.rb
+++ b/features/steps/project/commits/revert.rb
@@ -10,6 +10,7 @@ class Spinach::Features::RevertCommits < Spinach::FeatureSteps
   end
 
   step 'I click on the revert button' do
+    find(".header-action-buttons .dropdown").click
     find("a[href='#modal-revert-commit']").click
   end
 
diff --git a/features/steps/project/forked_merge_requests.rb b/features/steps/project/forked_merge_requests.rb
index 8081b764be6..310db6e6dad 100644
--- a/features/steps/project/forked_merge_requests.rb
+++ b/features/steps/project/forked_merge_requests.rb
@@ -4,6 +4,7 @@ class Spinach::Features::ProjectForkedMergeRequests < Spinach::FeatureSteps
   include SharedNote
   include SharedPaths
   include Select2Helper
+  include WaitForVueResource
 
   step 'I am a member of project "Shop"' do
     @project = ::Project.find_by(name: "Shop")
@@ -31,6 +32,8 @@ class Spinach::Features::ProjectForkedMergeRequests < Spinach::FeatureSteps
     expect(page).to have_content @project.path_with_namespace
     expect(page).to have_content @merge_request.source_branch
     expect(page).to have_content @merge_request.target_branch
+
+    wait_for_vue_resource
   end
 
   step 'I fill out a "Merge Request On Forked Project" merge request' do
diff --git a/features/steps/project/merge_requests.rb b/features/steps/project/merge_requests.rb
index 4b7d6cd840b..573be44c695 100644
--- a/features/steps/project/merge_requests.rb
+++ b/features/steps/project/merge_requests.rb
@@ -8,6 +8,7 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
   include SharedDiffNote
   include SharedUser
   include WaitForAjax
+  include WaitForVueResource
 
   after do
     wait_for_ajax if javascript_test?
@@ -45,19 +46,23 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
     page.within '.merge-request' do
       expect(page).to have_content "Wiki Feature"
     end
+    wait_for_vue_resource
   end
 
   step 'I should see closed merge request "Bug NS-04"' do
     expect(page).to have_content "Bug NS-04"
     expect(page).to have_content "Closed by"
+    wait_for_vue_resource
   end
 
   step 'I should see merge request "Bug NS-04"' do
     expect(page).to have_content "Bug NS-04"
+    wait_for_vue_resource
   end
 
   step 'I should see merge request "Feature NS-05"' do
     expect(page).to have_content "Feature NS-05"
+    wait_for_vue_resource
   end
 
   step 'I should not see "master" branch' do
@@ -358,10 +363,12 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
 
   step 'I should see a badge of "1" next to the discussion link' do
     expect_discussion_badge_to_have_counter("1")
+    wait_for_vue_resource
   end
 
   step 'I should see a badge of "0" next to the discussion link' do
     expect_discussion_badge_to_have_counter("0")
+    wait_for_vue_resource
   end
 
   step 'I should see a discussion has started on commit diff' do
@@ -369,6 +376,7 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
       page.should have_content "#{current_user.name} #{current_user.to_reference} started a discussion on commit"
       page.should have_content sample_commit.line_code_path
       page.should have_content "Line is wrong"
+      wait_for_vue_resource
     end
   end
 
@@ -376,16 +384,17 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
     page.within(".notes .discussion") do
       page.should have_content "#{current_user.name} #{current_user.to_reference} started a discussion on commit"
       page.should have_content "One comment to rule them all"
+      wait_for_vue_resource
     end
   end
 
   step 'merge request is mergeable' do
-    expect(page).to have_button 'Accept merge request'
+    expect(page).to have_button 'Merge'
   end
 
   step 'I modify merge commit message' do
     click_button "Modify commit message"
-    fill_in 'commit_message', with: 'wow such merge'
+    fill_in 'Commit message', with: 'wow such merge'
   end
 
   step 'merge request "Bug NS-05" is mergeable' do
@@ -394,24 +403,26 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
 
   step 'I accept this merge request' do
     page.within '.mr-state-widget' do
-      click_button "Accept merge request"
+      click_button "Merge"
     end
   end
 
   step 'I should see merged request' do
     page.within '.status-box' do
       expect(page).to have_content "Merged"
+      wait_for_vue_resource
     end
   end
 
   step 'I click link "Reopen"' do
-    first(:css, '.reopen-mr-link').click
+    first(:css, '.reopen-mr-link').trigger('click')
   end
 
   step 'I should see reopened merge request "Bug NS-04"' do
     page.within '.status-box' do
       expect(page).to have_content "Open"
     end
+    wait_for_vue_resource
   end
 
   step 'I click link "Hide inline discussion" of the third file' do
@@ -435,6 +446,7 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
   step 'I should see a comment like "Line is wrong" in the third file' do
     page.within '.files>div:nth-child(3) .note-body > .note-text' do
       expect(page).to have_visible_content "Line is wrong"
+      wait_for_vue_resource
     end
   end
 
@@ -502,6 +514,7 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
   step 'I should see comments on the side-by-side diff page' do
     page.within '.files>div:nth-child(2) .parallel .note-body > .note-text' do
       expect(page).to have_visible_content "Line is correct"
+      wait_for_vue_resource
     end
   end
 
@@ -557,12 +570,16 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
     page.within ".mr-source-target" do
       expect(page).to have_content /([0-9]+ commits behind)/
     end
+
+    wait_for_vue_resource
   end
 
   step 'I should not see the diverged commits count' do
     page.within ".mr-source-target" do
       expect(page).not_to have_content /([0-9]+ commit[s]? behind)/
     end
+
+    wait_for_vue_resource
   end
 
   def merge_request
diff --git a/features/steps/project/merge_requests/acceptance.rb b/features/steps/project/merge_requests/acceptance.rb
index 7521a9439e3..3c976f675a2 100644
--- a/features/steps/project/merge_requests/acceptance.rb
+++ b/features/steps/project/merge_requests/acceptance.rb
@@ -1,7 +1,7 @@
 class Spinach::Features::ProjectMergeRequestsAcceptance < Spinach::FeatureSteps
   include LoginHelpers
   include GitlabRoutingHelper
-  include WaitForAjax
+  include WaitForVueResource
 
   step 'I am on the Merge Request detail page' do
     visit merge_request_path(@merge_request)
@@ -12,27 +12,27 @@ class Spinach::Features::ProjectMergeRequestsAcceptance < Spinach::FeatureSteps
   end
 
   step 'I click on "Remove source branch" option' do
-    check('Remove source branch')
+    uncheck('Remove source branch')
   end
 
   step 'I click on Accept Merge Request' do
-    click_button('Accept merge request')
+    click_button('Merge')
   end
 
   step 'I should see the Remove Source Branch button' do
-    expect(page).to have_link('Remove source branch')
+    expect(page).to have_selector('.js-remove-branch-button')
 
-    # Wait for AJAX requests to complete so they don't blow up if they are
+    # Wait for View Resource requests to complete so they don't blow up if they are
     # only handled after `DatabaseCleaner` has already run
-    wait_for_ajax
+    wait_for_vue_resource
   end
 
   step 'I should not see the Remove Source Branch button' do
-    expect(page).not_to have_link('Remove source branch')
+    expect(page).not_to have_selector('.js-remove-branch-button')
 
-    # Wait for AJAX requests to complete so they don't blow up if they are
+    # Wait for View Resource requests to complete so they don't blow up if they are
     # only handled after `DatabaseCleaner` has already run
-    wait_for_ajax
+    wait_for_vue_resource
   end
 
   step 'There is an open Merge Request' do
diff --git a/features/steps/project/merge_requests/revert.rb b/features/steps/project/merge_requests/revert.rb
index 1149c1c2426..aa76d6f8c48 100644
--- a/features/steps/project/merge_requests/revert.rb
+++ b/features/steps/project/merge_requests/revert.rb
@@ -1,6 +1,7 @@
 class Spinach::Features::RevertMergeRequests < Spinach::FeatureSteps
   include LoginHelpers
   include GitlabRoutingHelper
+  include WaitForVueResource
 
   step 'I click on the revert button' do
     find("a[href='#modal-revert-commit']").click
@@ -15,6 +16,7 @@ class Spinach::Features::RevertMergeRequests < Spinach::FeatureSteps
 
   step 'I should see the revert merge request notice' do
     page.should have_content('The merge request has been successfully reverted.')
+    wait_for_vue_resource
   end
 
   step 'I should not see the revert button' do
@@ -26,7 +28,7 @@ class Spinach::Features::RevertMergeRequests < Spinach::FeatureSteps
   end
 
   step 'I click on Accept Merge Request' do
-    click_button('Accept merge request')
+    click_button('Merge')
   end
 
   step 'I am signed in as a developer of the project' do
diff --git a/features/steps/shared/paths.rb b/features/steps/shared/paths.rb
index d5b3bb34d7a..46b3cb79af2 100644
--- a/features/steps/shared/paths.rb
+++ b/features/steps/shared/paths.rb
@@ -2,6 +2,7 @@ module SharedPaths
   include Spinach::DSL
   include RepoHelpers
   include DashboardHelper
+  include WaitForVueResource
 
   step 'I visit new project page' do
     visit new_project_path
@@ -377,23 +378,28 @@ module SharedPaths
 
   step 'I visit merge request page "Bug NS-04"' do
     visit merge_request_path("Bug NS-04")
+    wait_for_vue_resource
   end
 
   step 'I visit merge request page "Bug NS-05"' do
     visit merge_request_path("Bug NS-05")
+    wait_for_vue_resource
   end
 
   step 'I visit merge request page "Bug NS-07"' do
     visit merge_request_path("Bug NS-07")
+    wait_for_vue_resource
   end
 
   step 'I visit merge request page "Bug NS-08"' do
     visit merge_request_path("Bug NS-08")
+    wait_for_vue_resource
   end
 
   step 'I visit merge request page "Bug CO-01"' do
     mr = MergeRequest.find_by(title: "Bug CO-01")
     visit namespace_project_merge_request_path(mr.target_project.namespace, mr.target_project, mr)
+    wait_for_vue_resource
   end
 
   step 'I visit project "Shop" merge requests page' do
diff --git a/features/support/env.rb b/features/support/env.rb
index 92d13bea4b6..568eeae4479 100644
--- a/features/support/env.rb
+++ b/features/support/env.rb
@@ -10,7 +10,7 @@ if ENV['CI']
   Knapsack::Adapters::SpinachAdapter.bind
 end
 
-%w(select2_helper test_env repo_helpers wait_for_ajax wait_for_requests sidekiq).each do |f|
+%w(select2_helper test_env repo_helpers wait_for_ajax wait_for_requests sidekiq wait_for_vue_resource).each do |f|
   require Rails.root.join('spec', 'support', f)
 end
 
diff --git a/lib/gitlab/prometheus.rb b/lib/gitlab/prometheus.rb
index 8827507955d..37125980b1c 100644
--- a/lib/gitlab/prometheus.rb
+++ b/lib/gitlab/prometheus.rb
@@ -13,18 +13,18 @@ module Gitlab
       json_api_get('query', query: '1')
     end
 
-    def query(query)
+    def query(query, time: Time.now)
       get_result('vector') do
-        json_api_get('query', query: query)
+        json_api_get('query', query: query, time: time.utc.to_f)
       end
     end
 
-    def query_range(query, start: 8.hours.ago)
+    def query_range(query, start: 8.hours.ago, stop: Time.now)
       get_result('matrix') do
         json_api_get('query_range',
           query: query,
           start: start.to_f,
-          end: Time.now.utc.to_f,
+          end: stop.to_f,
           step: 1.minute.to_i)
       end
     end
diff --git a/spec/controllers/projects/branches_controller_spec.rb b/spec/controllers/projects/branches_controller_spec.rb
index 8f915d9d210..f285e5333d6 100644
--- a/spec/controllers/projects/branches_controller_spec.rb
+++ b/spec/controllers/projects/branches_controller_spec.rb
@@ -213,33 +213,98 @@ describe Projects::BranchesController do
       sign_in(user)
 
       post :destroy,
-           format: :js,
-           id: branch,
-           namespace_id: project.namespace,
-           project_id: project
+        format: format,
+        id: branch,
+        namespace_id: project.namespace,
+        project_id: project
     end
 
-    context "valid branch name, valid source" do
+    context 'as JS' do
       let(:branch) { "feature" }
+      let(:format) { :js }
 
-      it { expect(response).to have_http_status(200) }
-    end
+      context "valid branch name, valid source" do
+        let(:branch) { "feature" }
+
+        it { expect(response).to have_http_status(200) }
+        it { expect(response.body).to be_blank }
+      end
+
+      context "valid branch name with unencoded slashes" do
+        let(:branch) { "improve/awesome" }
+
+        it { expect(response).to have_http_status(200) }
+        it { expect(response.body).to be_blank }
+      end
+
+      context "valid branch name with encoded slashes" do
+        let(:branch) { "improve%2Fawesome" }
 
-    context "valid branch name with unencoded slashes" do
-      let(:branch) { "improve/awesome" }
+        it { expect(response).to have_http_status(200) }
+        it { expect(response.body).to be_blank }
+      end
 
-      it { expect(response).to have_http_status(200) }
+      context "invalid branch name, valid ref" do
+        let(:branch) { "no-branch" }
+
+        it { expect(response).to have_http_status(404) }
+        it { expect(response.body).to be_blank }
+      end
     end
 
-    context "valid branch name with encoded slashes" do
-      let(:branch) { "improve%2Fawesome" }
+    context 'as JSON' do
+      let(:branch) { "feature" }
+      let(:format) { :json }
+
+      context 'valid branch name, valid source' do
+        let(:branch) { "feature" }
 
-      it { expect(response).to have_http_status(200) }
+        it 'returns JSON response with message' do
+          expect(json_response).to eql("message" => 'Branch was removed')
+        end
+
+        it { expect(response).to have_http_status(200) }
+      end
+
+      context 'valid branch name with unencoded slashes' do
+        let(:branch) { "improve/awesome" }
+
+        it 'returns JSON response with message' do
+          expect(json_response).to eql('message' => 'Branch was removed')
+        end
+
+        it { expect(response).to have_http_status(200) }
+      end
+
+      context "valid branch name with encoded slashes" do
+        let(:branch) { 'improve%2Fawesome' }
+
+        it 'returns JSON response with message' do
+          expect(json_response).to eql('message' => 'Branch was removed')
+        end
+
+        it { expect(response).to have_http_status(200) }
+      end
+
+      context 'invalid branch name, valid ref' do
+        let(:branch) { 'no-branch' }
+
+        it 'returns JSON response with message' do
+          expect(json_response).to eql('message' => 'No such branch')
+        end
+
+        it { expect(response).to have_http_status(404) }
+      end
     end
-    context "invalid branch name, valid ref" do
-      let(:branch) { "no-branch" }
 
-      it { expect(response).to have_http_status(404) }
+    context 'as HTML' do
+      let(:branch) { "feature" }
+      let(:format) { :html }
+
+      it 'redirects to branches path' do
+        expect(response)
+          .to redirect_to(namespace_project_branches_path(project.namespace, project))
+      end
     end
   end
 
diff --git a/spec/controllers/projects/deployments_controller_spec.rb b/spec/controllers/projects/deployments_controller_spec.rb
index 89692b601b2..3de38bb4dac 100644
--- a/spec/controllers/projects/deployments_controller_spec.rb
+++ b/spec/controllers/projects/deployments_controller_spec.rb
@@ -8,7 +8,7 @@ describe Projects::DeploymentsController do
   let(:environment) { create(:environment, name: 'production', project: project) }
 
   before do
-    project.add_master(user)
+    project.team << [user, :master]
 
     sign_in(user)
   end
@@ -19,7 +19,7 @@ describe Projects::DeploymentsController do
       create(:deployment, environment: environment, created_at: 7.hours.ago)
       create(:deployment, environment: environment)
 
-      get :index, environment_params(after: 8.hours.ago)
+      get :index, deployment_params(after: 8.hours.ago)
 
       expect(response).to be_ok
 
@@ -29,14 +29,59 @@ describe Projects::DeploymentsController do
     it 'returns a list with deployments information' do
       create(:deployment, environment: environment)
 
-      get :index, environment_params
+      get :index, deployment_params
 
       expect(response).to be_ok
       expect(response).to match_response_schema('deployments')
     end
   end
 
-  def environment_params(opts = {})
-    opts.reverse_merge(namespace_id: project.namespace, project_id: project, environment_id: environment.id)
+  describe 'GET #metrics' do
+    let(:deployment) { create(:deployment, project: project, environment: environment) }
+
+    before do
+      allow(controller).to receive(:deployment).and_return(deployment)
+    end
+
+    context 'when environment has no metrics' do
+      before do
+        expect(deployment).to receive(:metrics).and_return(nil)
+      end
+
+      it 'returns a empty response 204 resposne' do
+        get :metrics, deployment_params(id: deployment.id)
+        expect(response).to have_http_status(204)
+        expect(response.body).to eq('')
+      end
+    end
+
+    context 'when environment has some metrics' do
+      let(:empty_metrics) do
+        {
+          success: true,
+          metrics: {},
+          last_update: 42
+        }
+      end
+
+      before do
+        expect(deployment).to receive(:metrics).and_return(empty_metrics)
+      end
+
+      it 'returns a metrics JSON document' do
+        get :metrics, deployment_params(id: deployment.id)
+
+        expect(response).to be_ok
+        expect(json_response['success']).to be(true)
+        expect(json_response['metrics']).to eq({})
+        expect(json_response['last_update']).to eq(42)
+      end
+    end
+  end
+
+  def deployment_params(opts = {})
+    opts.reverse_merge(namespace_id: project.namespace,
+                       project_id: project,
+                       environment_id: environment.id)
   end
 end
diff --git a/spec/controllers/projects/environments_controller_spec.rb b/spec/controllers/projects/environments_controller_spec.rb
index 5c478534ff3..c0f8c36a018 100644
--- a/spec/controllers/projects/environments_controller_spec.rb
+++ b/spec/controllers/projects/environments_controller_spec.rb
@@ -149,6 +149,48 @@ describe Projects::EnvironmentsController do
     end
   end
 
+  describe 'PATCH #stop' do
+    context 'when env not available' do
+      it 'returns 404' do
+        allow_any_instance_of(Environment).to receive(:available?) { false }
+
+        patch :stop, environment_params(format: :json)
+
+        expect(response).to have_http_status(404)
+      end
+    end
+
+    context 'when stop action' do
+      it 'returns action url' do
+        action = create(:ci_build, :manual)
+
+        allow_any_instance_of(Environment)
+          .to receive_messages(available?: true, stop_with_action!: action)
+
+        patch :stop, environment_params(format: :json)
+
+        expect(response).to have_http_status(200)
+        expect(json_response).to eq(
+          { 'redirect_url' =>
+              "http://test.host/#{project.path_with_namespace}/builds/#{action.id}" })
+      end
+    end
+
+    context 'when no stop action' do
+      it 'returns env url' do
+        allow_any_instance_of(Environment)
+          .to receive_messages(available?: true, stop_with_action!: nil)
+
+        patch :stop, environment_params(format: :json)
+
+        expect(response).to have_http_status(200)
+        expect(json_response).to eq(
+          { 'redirect_url' =>
+              "http://test.host/#{project.path_with_namespace}/environments/#{environment.id}" })
+      end
+    end
+  end
+
   describe 'GET #terminal' do
     context 'with valid id' do
       it 'responds with a status code 200' do
diff --git a/spec/controllers/projects/merge_requests_controller_spec.rb b/spec/controllers/projects/merge_requests_controller_spec.rb
index 0483c6b7879..964246b580c 100644
--- a/spec/controllers/projects/merge_requests_controller_spec.rb
+++ b/spec/controllers/projects/merge_requests_controller_spec.rb
@@ -59,6 +59,18 @@ describe Projects::MergeRequestsController do
     end
   end
 
+  describe 'GET commit_change_content' do
+    it 'renders commit_change_content template' do
+      get :commit_change_content,
+        namespace_id: project.namespace.to_param,
+        project_id: project,
+        id: merge_request.iid,
+        format: 'html'
+
+      expect(response).to render_template('_commit_change_content')
+    end
+  end
+
   shared_examples "loads labels" do |action|
     it "loads labels into the @labels variable" do
       get action,
@@ -71,63 +83,47 @@ describe Projects::MergeRequestsController do
   end
 
   describe "GET show" do
-    shared_examples "export merge as" do |format|
-      it "does generally work" do
-        get(:show,
-            namespace_id: project.namespace.to_param,
-            project_id: project,
-            id: merge_request.iid,
-            format: format)
+    def go(extra_params = {})
+      params = {
+        namespace_id: project.namespace.to_param,
+        project_id: project,
+        id: merge_request.iid
+      }
 
-        expect(response).to be_success
-      end
+      get :show, params.merge(extra_params)
+    end
 
-      it_behaves_like "loads labels", :show
+    it_behaves_like "loads labels", :show
 
-      it "generates it" do
-        expect_any_instance_of(MergeRequest).to receive(:"to_#{format}")
+    describe 'as html' do
+      it "renders merge request page" do
+        go(format: :html)
 
-        get(:show,
-            namespace_id: project.namespace.to_param,
-            project_id: project,
-            id: merge_request.iid,
-            format: format)
+        expect(response).to be_success
       end
+    end
 
-      it "renders it" do
-        get(:show,
-            namespace_id: project.namespace.to_param,
-            project_id: project,
-            id: merge_request.iid,
-            format: format)
+    describe 'as json' do
+      context 'with basic param' do
+        it 'renders basic MR entity as json' do
+          go(basic: true, format: :json)
 
-        expect(response.body).to eq(merge_request.send(:"to_#{format}").to_s)
+          expect(response).to match_response_schema('entities/merge_request_basic')
+        end
       end
 
-      it "does not escape Html" do
-        allow_any_instance_of(MergeRequest).to receive(:"to_#{format}").
-          and_return('HTML entities &<>" ')
+      context 'without basic param' do
+        it 'renders the merge request in the json format' do
+          go(format: :json)
 
-        get(:show,
-            namespace_id: project.namespace.to_param,
-            project_id: project,
-            id: merge_request.iid,
-            format: format)
-
-        expect(response.body).not_to include('&amp;')
-        expect(response.body).not_to include('&gt;')
-        expect(response.body).not_to include('&lt;')
-        expect(response.body).not_to include('&quot;')
+          expect(response).to match_response_schema('entities/merge_request')
+        end
       end
     end
 
     describe "as diff" do
       it "triggers workhorse to serve the request" do
-        get(:show,
-            namespace_id: project.namespace.to_param,
-            project_id: project,
-            id: merge_request.iid,
-            format: :diff)
+        go(format: :diff)
 
         expect(response.headers[Gitlab::Workhorse::SEND_DATA_HEADER]).to start_with("git-diff:")
       end
@@ -135,11 +131,7 @@ describe Projects::MergeRequestsController do
 
     describe "as patch" do
       it 'triggers workhorse to serve the request' do
-        get(:show,
-            namespace_id: project.namespace.to_param,
-            project_id: project,
-            id: merge_request.iid,
-            format: :patch)
+        go(format: :patch)
 
         expect(response.headers[Gitlab::Workhorse::SEND_DATA_HEADER]).to start_with("git-format-patch:")
       end
@@ -295,19 +287,18 @@ describe Projects::MergeRequestsController do
         namespace_id: project.namespace,
         project_id: project,
         id: merge_request.iid,
-        format: 'raw'
+        format: 'json'
       }
     end
 
-    context 'when the user does not have access' do
+    context 'when user cannot access' do
       before do
-        project.team.truncate
-        project.team << [user, :reporter]
-        post :merge, base_params
+        project.add_reporter(user)
+        xhr :post, :merge, base_params
       end
 
-      it 'returns not found' do
-        expect(response).to be_not_found
+      it 'returns 404' do
+        expect(response).to have_http_status(404)
       end
     end
 
@@ -319,7 +310,7 @@ describe Projects::MergeRequestsController do
       end
 
       it 'returns :failed' do
-        expect(assigns(:status)).to eq(:failed)
+        expect(json_response).to eq('status' => 'failed')
       end
     end
 
@@ -327,7 +318,7 @@ describe Projects::MergeRequestsController do
       before { post :merge, base_params.merge(sha: 'foo') }
 
       it 'returns :sha_mismatch' do
-        expect(assigns(:status)).to eq(:sha_mismatch)
+        expect(json_response).to eq('status' => 'sha_mismatch')
       end
     end
 
@@ -339,7 +330,7 @@ describe Projects::MergeRequestsController do
       it 'returns :success' do
         merge_with_sha
 
-        expect(assigns(:status)).to eq(:success)
+        expect(json_response).to eq('status' => 'success')
       end
 
       it 'starts the merge immediately' do
@@ -360,7 +351,7 @@ describe Projects::MergeRequestsController do
         it 'returns :merge_when_pipeline_succeeds' do
           merge_when_pipeline_succeeds
 
-          expect(assigns(:status)).to eq(:merge_when_pipeline_succeeds)
+          expect(json_response).to eq('status' => 'merge_when_pipeline_succeeds')
         end
 
         it 'sets the MR to merge when the pipeline succeeds' do
@@ -382,7 +373,7 @@ describe Projects::MergeRequestsController do
           it 'returns :merge_when_pipeline_succeeds' do
             merge_when_pipeline_succeeds
 
-            expect(assigns(:status)).to eq(:merge_when_pipeline_succeeds)
+            expect(json_response).to eq('status' => 'merge_when_pipeline_succeeds')
           end
         end
       end
@@ -403,7 +394,7 @@ describe Projects::MergeRequestsController do
             it 'returns :failed' do
               merge_with_sha
 
-              expect(assigns(:status)).to eq(:failed)
+              expect(json_response).to eq('status' => 'failed')
             end
           end
 
@@ -416,7 +407,7 @@ describe Projects::MergeRequestsController do
             it 'returns :success' do
               merge_with_sha
 
-              expect(assigns(:status)).to eq(:success)
+              expect(json_response).to eq('status' => 'success')
             end
           end
         end
@@ -434,7 +425,7 @@ describe Projects::MergeRequestsController do
             it 'returns :success' do
               merge_with_sha
 
-              expect(assigns(:status)).to eq(:success)
+              expect(json_response).to eq('status' => 'success')
             end
           end
 
@@ -447,7 +438,7 @@ describe Projects::MergeRequestsController do
             it 'returns :success' do
               merge_with_sha
 
-              expect(assigns(:status)).to eq(:success)
+              expect(json_response).to eq('status' => 'success')
             end
           end
         end
@@ -831,18 +822,55 @@ describe Projects::MergeRequestsController do
     end
   end
 
-  context 'POST remove_wip' do
-    it 'removes the wip status' do
+  describe 'POST remove_wip' do
+    before do
       merge_request.title = merge_request.wip_title
       merge_request.save
 
-      post :remove_wip,
-           namespace_id: merge_request.project.namespace.to_param,
-           project_id: merge_request.project,
-           id: merge_request.iid
+      xhr :post, :remove_wip,
+        namespace_id: merge_request.project.namespace.to_param,
+        project_id: merge_request.project,
+        id: merge_request.iid,
+        format: :json
+    end
 
+    it 'removes the wip status' do
       expect(merge_request.reload.title).to eq(merge_request.wipless_title)
     end
+
+    it 'renders MergeRequest as JSON' do
+      expect(json_response.keys).to include('id', 'iid', 'description')
+    end
+  end
+
+  describe 'POST cancel_merge_when_pipeline_succeeds' do
+    subject do
+      xhr :post, :cancel_merge_when_pipeline_succeeds,
+        namespace_id: merge_request.project.namespace.to_param,
+        project_id: merge_request.project,
+        id: merge_request.iid,
+        format: :json
+    end
+
+    it 'calls MergeRequests::MergeWhenPipelineSucceedsService' do
+      mwps_service = double
+
+      allow(MergeRequests::MergeWhenPipelineSucceedsService)
+        .to receive(:new)
+        .and_return(mwps_service)
+
+      expect(mwps_service).to receive(:cancel).with(merge_request)
+
+      subject
+    end
+
+    it { is_expected.to have_http_status(:success) }
+
+    it 'renders MergeRequest as JSON' do
+      subject
+
+      expect(json_response.keys).to include('id', 'iid', 'description')
+    end
   end
 
   describe 'GET conflict_for_path' do
@@ -1121,74 +1149,6 @@ describe Projects::MergeRequestsController do
     end
   end
 
-  describe 'GET merge_widget_refresh' do
-    let(:params) do
-      {
-        namespace_id: project.namespace,
-        project_id: project,
-        id: merge_request.iid,
-        format: :raw
-      }
-    end
-
-    before do
-      project.team << [user, :developer]
-      xhr :get, :merge_widget_refresh, params
-    end
-
-    context 'when merge in progress' do
-      let(:merge_request) { create(:merge_request, source_project: project, in_progress_merge_commit_sha: 'sha') }
-
-      it 'returns an OK response' do
-        expect(response).to have_http_status(:ok)
-      end
-
-      it 'sets status to :success' do
-        expect(assigns(:status)).to eq(:success)
-        expect(response).to render_template('merge')
-      end
-    end
-
-    context 'when merge request was merged already' do
-      let(:merge_request) { create(:merge_request, source_project: project, state: :merged) }
-
-      it 'returns an OK response' do
-        expect(response).to have_http_status(:ok)
-      end
-
-      it 'sets status to :success' do
-        expect(assigns(:status)).to eq(:success)
-        expect(response).to render_template('merge')
-      end
-    end
-
-    context 'when waiting for build' do
-      let(:merge_request) { create(:merge_request, source_project: project, merge_when_pipeline_succeeds: true, merge_user: user) }
-
-      it 'returns an OK response' do
-        expect(response).to have_http_status(:ok)
-      end
-
-      it 'sets status to :merge_when_pipeline_succeeds' do
-        expect(assigns(:status)).to eq(:merge_when_pipeline_succeeds)
-        expect(response).to render_template('merge')
-      end
-    end
-
-    context 'when MR does not have special state' do
-      let(:merge_request) { create(:merge_request, source_project: project) }
-
-      it 'returns an OK response' do
-        expect(response).to have_http_status(:ok)
-      end
-
-      it 'sets status to success' do
-        expect(assigns(:status)).to eq(:success)
-        expect(response).to render_template('merge')
-      end
-    end
-  end
-
   describe 'GET pipeline_status.json' do
     context 'when head_pipeline exists' do
       let!(:pipeline) do
diff --git a/spec/features/boards/issue_ordering_spec.rb b/spec/features/boards/issue_ordering_spec.rb
index c50155a6d14..bfa2a72a256 100644
--- a/spec/features/boards/issue_ordering_spec.rb
+++ b/spec/features/boards/issue_ordering_spec.rb
@@ -38,6 +38,8 @@ describe 'Issue Boards', :feature, :js do
     it 'moves un-ordered issue to top of list' do
       drag(from_index: 3, to_index: 0)
 
+      wait_for_vue_resource
+
       page.within(first('.board')) do
         expect(first('.card')).to have_content(issue4.title)
       end
diff --git a/spec/features/issues/create_issue_for_discussions_in_merge_request_spec.rb b/spec/features/issues/create_issue_for_discussions_in_merge_request_spec.rb
index 58f897cba3e..dc13cab2cd1 100644
--- a/spec/features/issues/create_issue_for_discussions_in_merge_request_spec.rb
+++ b/spec/features/issues/create_issue_for_discussions_in_merge_request_spec.rb
@@ -49,7 +49,7 @@ feature 'Resolving all open discussions in a merge request from an issue', featu
         end
 
         it 'does not show a link to create a new issue' do
-          expect(page).not_to have_link 'open an issue to resolve them later'
+          expect(page).not_to have_link 'Create an issue to resolve them later'
         end
       end
 
@@ -59,18 +59,18 @@ feature 'Resolving all open discussions in a merge request from an issue', featu
         end
 
         it 'shows a warning that the merge request contains unresolved discussions' do
-          expect(page).to have_content 'This merge request has unresolved discussions'
+          expect(page).to have_content 'There are unresolved discussions.'
         end
 
         it 'has a link to resolve all discussions by creating an issue' do
           page.within '.mr-widget-body' do
-            expect(page).to have_link 'open an issue to resolve them later', href: new_namespace_project_issue_path(project.namespace, project, merge_request_to_resolve_discussions_of: merge_request.iid)
+            expect(page).to have_link 'Create an issue to resolve them later', href: new_namespace_project_issue_path(project.namespace, project, merge_request_to_resolve_discussions_of: merge_request.iid)
           end
         end
 
         context 'creating an issue for discussions' do
           before do
-            page.click_link 'open an issue to resolve them later', href: new_namespace_project_issue_path(project.namespace, project, merge_request_to_resolve_discussions_of: merge_request.iid)
+            page.click_link 'Create an issue to resolve them later', href: new_namespace_project_issue_path(project.namespace, project, merge_request_to_resolve_discussions_of: merge_request.iid)
           end
 
           it_behaves_like 'creating an issue for a discussion'
diff --git a/spec/features/merge_requests/assign_issues_spec.rb b/spec/features/merge_requests/assign_issues_spec.rb
index ec49003772b..b306e2f5f75 100644
--- a/spec/features/merge_requests/assign_issues_spec.rb
+++ b/spec/features/merge_requests/assign_issues_spec.rb
@@ -18,7 +18,7 @@ feature 'Merge request issue assignment', js: true, feature: true do
   end
 
   context 'logged in as author' do
-    scenario 'updates related issues' do
+    it 'updates related issues' do
       visit_merge_request
       click_link "Assign yourself to these issues"
 
diff --git a/spec/features/merge_requests/check_if_mergeable_with_unresolved_discussions_spec.rb b/spec/features/merge_requests/check_if_mergeable_with_unresolved_discussions_spec.rb
index 77b7ba4ac7a..fa306c02a43 100644
--- a/spec/features/merge_requests/check_if_mergeable_with_unresolved_discussions_spec.rb
+++ b/spec/features/merge_requests/check_if_mergeable_with_unresolved_discussions_spec.rb
@@ -19,8 +19,8 @@ feature 'Check if mergeable with unresolved discussions', js: true, feature: tru
       it 'does not allow to merge' do
         visit_merge_request(merge_request)
 
-        expect(page).not_to have_button 'Accept merge request'
-        expect(page).to have_content('This merge request has unresolved discussions')
+        expect(page).not_to have_button 'Merge'
+        expect(page).to have_content('There are unresolved discussions.')
       end
     end
 
@@ -32,7 +32,7 @@ feature 'Check if mergeable with unresolved discussions', js: true, feature: tru
       it 'allows MR to be merged' do
         visit_merge_request(merge_request)
 
-        expect(page).to have_button 'Accept merge request'
+        expect(page).to have_button 'Merge'
       end
     end
   end
@@ -46,7 +46,7 @@ feature 'Check if mergeable with unresolved discussions', js: true, feature: tru
       it 'does not allow to merge' do
         visit_merge_request(merge_request)
 
-        expect(page).to have_button 'Accept merge request'
+        expect(page).to have_button 'Merge'
       end
     end
 
@@ -58,7 +58,7 @@ feature 'Check if mergeable with unresolved discussions', js: true, feature: tru
       it 'allows MR to be merged' do
         visit_merge_request(merge_request)
 
-        expect(page).to have_button 'Accept merge request'
+        expect(page).to have_button 'Merge'
       end
     end
   end
diff --git a/spec/features/merge_requests/cherry_pick_spec.rb b/spec/features/merge_requests/cherry_pick_spec.rb
index dfe7c910a10..6ba681e36f7 100644
--- a/spec/features/merge_requests/cherry_pick_spec.rb
+++ b/spec/features/merge_requests/cherry_pick_spec.rb
@@ -1,6 +1,6 @@
 require 'spec_helper'
 
-describe 'Cherry-pick Merge Requests' do
+describe 'Cherry-pick Merge Requests', js: true do
   let(:user) { create(:user) }
   let(:group) { create(:group) }
   let(:project) { create(:project, namespace: group) }
diff --git a/spec/features/merge_requests/closes_issues_spec.rb b/spec/features/merge_requests/closes_issues_spec.rb
index eafcab6a0d7..ee0880a1e2f 100644
--- a/spec/features/merge_requests/closes_issues_spec.rb
+++ b/spec/features/merge_requests/closes_issues_spec.rb
@@ -1,6 +1,8 @@
 require 'spec_helper'
 
-feature 'Merge Request closing issues message', feature: true do
+feature 'Merge Request closing issues message', feature: true, js: true do
+  include WaitForAjax
+
   let(:user) { create(:user) }
   let(:project) { create(:project, :public) }
   let(:issue_1) { create(:issue, project: project)}
@@ -23,6 +25,7 @@ feature 'Merge Request closing issues message', feature: true do
     login_as user
 
     visit namespace_project_merge_request_path(project.namespace, project, merge_request)
+    wait_for_ajax
   end
 
   context 'not closing or mentioning any issue' do
@@ -35,7 +38,7 @@ feature 'Merge Request closing issues message', feature: true do
     let(:merge_request_description) { "Description\n\nclosing #{issue_1.to_reference}, #{issue_2.to_reference}" }
 
     it 'does not display closing issue message' do
-      expect(page).to have_content("Accepting this merge request will close issues #{issue_1.to_reference} and #{issue_2.to_reference}")
+      expect(page).to have_content("Closes issues #{issue_1.to_reference} and #{issue_2.to_reference}")
     end
   end
 
@@ -51,7 +54,8 @@ feature 'Merge Request closing issues message', feature: true do
     let(:merge_request_title) { "closes #{issue_1.to_reference}\n\n refers to #{issue_2.to_reference}" }
 
     it 'does not display closing issue message' do
-      expect(page).to have_content("Accepting this merge request will close issue #{issue_1.to_reference}. Issue #{issue_2.to_reference} is mentioned but will not be closed.")
+      expect(page).to have_content("Closes issue #{issue_1.to_reference}.")
+      expect(page).to have_content("Issue #{issue_2.to_reference} is mentioned but will not be closed.")
     end
   end
 
@@ -59,7 +63,7 @@ feature 'Merge Request closing issues message', feature: true do
     let(:merge_request_title) { "closing #{issue_1.to_reference}, #{issue_2.to_reference}" }
 
     it 'does not display closing issue message' do
-      expect(page).to have_content("Accepting this merge request will close issues #{issue_1.to_reference} and #{issue_2.to_reference}")
+      expect(page).to have_content("Closes issues #{issue_1.to_reference} and #{issue_2.to_reference}")
     end
   end
 
@@ -75,7 +79,8 @@ feature 'Merge Request closing issues message', feature: true do
     let(:merge_request_title) { "closes #{issue_1.to_reference}\n\n refers to #{issue_2.to_reference}" }
 
     it 'does not display closing issue message' do
-      expect(page).to have_content("Accepting this merge request will close issue #{issue_1.to_reference}. Issue #{issue_2.to_reference} is mentioned but will not be closed.")
+      expect(page).to have_content("Closes issue #{issue_1.to_reference}. Issue #{issue_2.to_reference} is mentioned but will not be closed.")
+      expect(page).to have_content("Issue #{issue_2.to_reference} is mentioned but will not be closed.")
     end
   end
 end
diff --git a/spec/features/merge_requests/created_from_fork_spec.rb b/spec/features/merge_requests/created_from_fork_spec.rb
index 18833ba7266..bf34c99b92a 100644
--- a/spec/features/merge_requests/created_from_fork_spec.rb
+++ b/spec/features/merge_requests/created_from_fork_spec.rb
@@ -31,7 +31,7 @@ feature 'Merge request created from fork' do
       fork_project.destroy!
     end
 
-    scenario 'user can access merge request' do
+    scenario 'user can access merge request', js: true do
       visit_merge_request(merge_request)
 
       expect(page).to have_content 'Test merge request'
diff --git a/spec/features/merge_requests/deleted_source_branch_spec.rb b/spec/features/merge_requests/deleted_source_branch_spec.rb
index 648678e2b1a..01e5e4f3a05 100644
--- a/spec/features/merge_requests/deleted_source_branch_spec.rb
+++ b/spec/features/merge_requests/deleted_source_branch_spec.rb
@@ -20,7 +20,7 @@ describe 'Deleted source branch', feature: true, js: true do
 
   it 'shows a message about missing source branch' do
     expect(page).to have_content(
-      'Source branch this-branch-does-not-exist does not exist'
+      'Source branch does not exist.'
     )
   end
 
@@ -35,6 +35,6 @@ describe 'Deleted source branch', feature: true, js: true do
     wait_for_ajax
 
     expect(page).to have_selector('.diffs.tab-pane .nothing-here-block')
-    expect(page).to have_content('Nothing to merge from this-branch-does-not-exist into feature')
+    expect(page).to have_content('Source branch does not exist.')
   end
 end
diff --git a/spec/features/merge_requests/edit_mr_spec.rb b/spec/features/merge_requests/edit_mr_spec.rb
index cb3bc392903..ec87a99b3ab 100644
--- a/spec/features/merge_requests/edit_mr_spec.rb
+++ b/spec/features/merge_requests/edit_mr_spec.rb
@@ -29,18 +29,6 @@ feature 'Edit Merge Request', feature: true do
       expect(page).to have_content 'Someone edited the merge request the same time you did'
     end
 
-    it 'allows to unselect "Remove source branch"' do
-      merge_request.update(merge_params: { 'force_remove_source_branch' => '1' })
-      expect(merge_request.merge_params['force_remove_source_branch']).to be_truthy
-
-      visit edit_namespace_project_merge_request_path(project.namespace, project, merge_request)
-      uncheck 'Remove source branch when merge request is accepted'
-
-      click_button 'Save changes'
-
-      expect(page).to have_content 'Remove source branch'
-    end
-
     it 'should preserve description textarea height', js: true do
       long_description = %q(
         Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam ac ornare ligula, ut tempus arcu. Etiam ultricies accumsan dolor vitae faucibus. Donec at elit lacus. Mauris orci ante, aliquam quis lorem eget, convallis faucibus arcu. Aenean at pulvinar lacus. Ut viverra quam massa, molestie ornare tortor dignissim a. Suspendisse tristique pellentesque tellus, id lacinia metus elementum id. Nam tristique, arcu rhoncus faucibus viverra, lacus ipsum sagittis ligula, vitae convallis odio lacus a nibh. Ut tincidunt est purus, ac vestibulum augue maximus in. Suspendisse vel erat et mi ultricies semper. Pellentesque volutpat pellentesque consequat.
diff --git a/spec/features/merge_requests/merge_commit_message_toggle_spec.rb b/spec/features/merge_requests/merge_commit_message_toggle_spec.rb
index 1bc2a5548dd..221ddb5873c 100644
--- a/spec/features/merge_requests/merge_commit_message_toggle_spec.rb
+++ b/spec/features/merge_requests/merge_commit_message_toggle_spec.rb
@@ -14,8 +14,6 @@ feature 'Clicking toggle commit message link', feature: true, js: true do
     )
   end
   let(:textbox) { page.find(:css, '.js-commit-message', visible: false) }
-  let(:include_link) { page.find(:css, '.js-with-description-link', visible: false) }
-  let(:do_not_include_link) { page.find(:css, '.js-without-description-link', visible: false) }
   let(:default_message) do
     [
       "Merge branch 'feature' into 'master'",
@@ -40,7 +38,7 @@ feature 'Clicking toggle commit message link', feature: true, js: true do
 
     visit namespace_project_merge_request_path(project.namespace, project, merge_request)
 
-    expect(textbox).not_to be_visible
+    expect(page).not_to have_selector('.js-commit-message')
     click_button "Modify commit message"
     expect(textbox).to be_visible
   end
@@ -56,19 +54,4 @@ feature 'Clicking toggle commit message link', feature: true, js: true do
 
     expect(textbox.value).to eq(default_message)
   end
-
-  it "toggles link between 'Include description' and 'Don't include description'" do
-    expect(include_link).to be_visible
-    expect(do_not_include_link).not_to be_visible
-
-    click_link "Include description in commit message"
-
-    expect(include_link).not_to be_visible
-    expect(do_not_include_link).to be_visible
-
-    click_link "Don't include description in commit message"
-
-    expect(include_link).to be_visible
-    expect(do_not_include_link).not_to be_visible
-  end
 end
diff --git a/spec/features/merge_requests/merge_immediately_with_pipeline_spec.rb b/spec/features/merge_requests/merge_immediately_with_pipeline_spec.rb
index 497240803d4..b79667a1a4c 100644
--- a/spec/features/merge_requests/merge_immediately_with_pipeline_spec.rb
+++ b/spec/features/merge_requests/merge_immediately_with_pipeline_spec.rb
@@ -34,7 +34,7 @@ feature 'Merge immediately', :feature, :js do
 
         click_link 'Merge immediately'
 
-        expect(find('.js-merge-when-pipeline-succeeds-button')).to have_content('Merge in progress')
+        expect(find('.accept-merge-request.btn-info')).to have_content('Merge in progress')
 
         wait_for_ajax
       end
diff --git a/spec/features/merge_requests/merge_when_pipeline_succeeds_spec.rb b/spec/features/merge_requests/merge_when_pipeline_succeeds_spec.rb
index cd540ca113a..b33d7f90a31 100644
--- a/spec/features/merge_requests/merge_when_pipeline_succeeds_spec.rb
+++ b/spec/features/merge_requests/merge_when_pipeline_succeeds_spec.rb
@@ -38,8 +38,8 @@ feature 'Merge When Pipeline Succeeds', :feature, :js do
           click_button "Merge when pipeline succeeds"
 
           expect(page).to have_content "Set by #{user.name} to be merged automatically when the pipeline succeeds."
-          expect(page).to have_content "The source branch will not be removed."
-          expect(page).to have_link "Cancel automatic merge"
+          expect(page).to have_content "The source branch will be removed."
+          expect(page).to have_selector ".js-cancel-auto-merge"
           visit_merge_request(merge_request) # Needed to refresh the page
           expect(page).to have_content /enabled an automatic merge when the pipeline for \h{8} succeeds/i
         end
@@ -93,12 +93,10 @@ feature 'Merge When Pipeline Succeeds', :feature, :js do
     describe 'enabling Merge when pipeline succeeds via dropdown' do
       it 'activates the Merge when pipeline succeeds feature' do
         click_button 'Select merge moment'
-        within('.js-merge-dropdown') do
-          click_link 'Merge when pipeline succeeds'
-        end
+        click_link 'Merge when pipeline succeeds'
 
         expect(page).to have_content "Set by #{user.name} to be merged automatically when the pipeline succeeds."
-        expect(page).to have_content "The source branch will not be removed."
+        expect(page).to have_content "The source branch will be removed."
         expect(page).to have_link "Cancel automatic merge"
       end
     end
@@ -131,13 +129,6 @@ feature 'Merge When Pipeline Succeeds', :feature, :js do
       expect(page).to have_content "canceled the automatic merge"
     end
 
-    it "allows the user to remove the source branch" do
-      expect(page).to have_link "Remove source branch when merged"
-
-      click_link "Remove source branch when merged"
-      expect(page).to have_content "The source branch will be removed"
-    end
-
     context 'when pipeline succeeds' do
       background { build.success }
 
diff --git a/spec/features/merge_requests/only_allow_merge_if_build_succeeds_spec.rb b/spec/features/merge_requests/only_allow_merge_if_build_succeeds_spec.rb
index 4a590e3bf68..187e927dac4 100644
--- a/spec/features/merge_requests/only_allow_merge_if_build_succeeds_spec.rb
+++ b/spec/features/merge_requests/only_allow_merge_if_build_succeeds_spec.rb
@@ -1,6 +1,8 @@
 require 'spec_helper'
 
-feature 'Only allow merge requests to be merged if the pipeline succeeds', feature: true do
+feature 'Only allow merge requests to be merged if the pipeline succeeds', feature: true, js: true do
+  include WaitForVueResource
+
   let(:merge_request) { create(:merge_request_with_diffs) }
   let(:project)       { merge_request.target_project }
 
@@ -10,15 +12,17 @@ feature 'Only allow merge requests to be merged if the pipeline succeeds', featu
     project.team << [merge_request.author, :master]
   end
 
-  context 'project does not have CI enabled' do
+  context 'project does not have CI enabled', js: true do
     it 'allows MR to be merged' do
       visit_merge_request(merge_request)
 
-      expect(page).to have_button 'Accept merge request'
+      wait_for_vue_resource
+
+      expect(page).to have_button 'Merge'
     end
   end
 
-  context 'when project has CI enabled' do
+  context 'when project has CI enabled', js: true do
     given!(:pipeline) do
       create(:ci_empty_pipeline,
       project: project,
@@ -38,6 +42,8 @@ feature 'Only allow merge requests to be merged if the pipeline succeeds', featu
         it 'does not allow to merge immediately' do
           visit_merge_request(merge_request)
 
+          wait_for_vue_resource
+
           expect(page).to have_button 'Merge when pipeline succeeds'
           expect(page).not_to have_button 'Select merge moment'
         end
@@ -49,7 +55,9 @@ feature 'Only allow merge requests to be merged if the pipeline succeeds', featu
         it 'does not allow MR to be merged' do
           visit_merge_request(merge_request)
 
-          expect(page).not_to have_button 'Accept merge request'
+          wait_for_vue_resource
+
+          expect(page).to have_css('button[disabled="disabled"]', text: 'Merge')
           expect(page).to have_content('Please retry the job or push a new commit to fix the failure.')
         end
       end
@@ -60,7 +68,9 @@ feature 'Only allow merge requests to be merged if the pipeline succeeds', featu
         it 'does not allow MR to be merged' do
           visit_merge_request(merge_request)
 
-          expect(page).not_to have_button 'Accept merge request'
+          wait_for_vue_resource
+
+          expect(page).not_to have_button 'Merge'
           expect(page).to have_content('Please retry the job or push a new commit to fix the failure.')
         end
       end
@@ -71,7 +81,9 @@ feature 'Only allow merge requests to be merged if the pipeline succeeds', featu
         it 'allows MR to be merged' do
           visit_merge_request(merge_request)
 
-          expect(page).to have_button 'Accept merge request'
+          wait_for_vue_resource
+
+          expect(page).to have_button 'Merge'
         end
       end
 
@@ -81,7 +93,9 @@ feature 'Only allow merge requests to be merged if the pipeline succeeds', featu
         it 'allows MR to be merged' do
           visit_merge_request(merge_request)
 
-          expect(page).to have_button 'Accept merge request'
+          wait_for_vue_resource
+
+          expect(page).to have_button 'Merge'
         end
       end
     end
@@ -94,9 +108,11 @@ feature 'Only allow merge requests to be merged if the pipeline succeeds', featu
       context 'when CI is running' do
         given(:status) { :running }
 
-        it 'allows MR to be merged immediately', js: true do
+        it 'allows MR to be merged immediately' do
           visit_merge_request(merge_request)
 
+          wait_for_vue_resource
+
           expect(page).to have_button 'Merge when pipeline succeeds'
 
           click_button 'Select merge moment'
@@ -110,7 +126,9 @@ feature 'Only allow merge requests to be merged if the pipeline succeeds', featu
         it 'allows MR to be merged' do
           visit_merge_request(merge_request)
 
-          expect(page).to have_button 'Accept merge request'
+          wait_for_vue_resource
+
+          expect(page).to have_button 'Merge'
         end
       end
 
@@ -120,7 +138,9 @@ feature 'Only allow merge requests to be merged if the pipeline succeeds', featu
         it 'allows MR to be merged' do
           visit_merge_request(merge_request)
 
-          expect(page).to have_button 'Accept merge request'
+          wait_for_vue_resource
+
+          expect(page).to have_button 'Merge'
         end
       end
     end
diff --git a/spec/features/merge_requests/target_branch_spec.rb b/spec/features/merge_requests/target_branch_spec.rb
index b6134540273..c154cf8ade9 100644
--- a/spec/features/merge_requests/target_branch_spec.rb
+++ b/spec/features/merge_requests/target_branch_spec.rb
@@ -1,6 +1,6 @@
 require 'spec_helper'
 
-describe 'Target branch', feature: true do
+describe 'Target branch', feature: true, js: true do
   let(:user) { create(:user) }
   let(:merge_request) { create(:merge_request) }
   let(:project) { merge_request.project }
@@ -17,11 +17,6 @@ describe 'Target branch', feature: true do
     project.team << [user, :master]
   end
 
-  it 'shows link to target branch' do
-    visit path_to_merge_request
-    expect(page).to have_link('feature', href: namespace_project_commits_path(project.namespace, project, merge_request.target_branch))
-  end
-
   context 'when branch was deleted' do
     before do
       DeleteBranchService.new(project, user).execute('feature')
@@ -30,12 +25,12 @@ describe 'Target branch', feature: true do
 
     it 'shows a message about missing target branch' do
       expect(page).to have_content(
-        'Target branch feature does not exist'
+        'Target branch does not exist'
       )
     end
 
     it 'does not show link to target branch' do
-      expect(page).not_to have_link('feature')
+      expect(page).not_to have_selector('.mr-widget-body .js-branch-text a')
     end
   end
 end
diff --git a/spec/features/merge_requests/widget_deployments_spec.rb b/spec/features/merge_requests/widget_deployments_spec.rb
index 00d191ddf2c..8370499f6ed 100644
--- a/spec/features/merge_requests/widget_deployments_spec.rb
+++ b/spec/features/merge_requests/widget_deployments_spec.rb
@@ -21,7 +21,7 @@ feature 'Widget Deployments Header', feature: true, js: true do
       wait_for_ajax
 
       expect(page).to have_content("Deployed to #{environment.name}")
-      expect(find('.ci_widget > span > span')['data-title']).to eq(deployment.created_at.to_time.in_time_zone.to_s(:medium))
+      expect(find('.js-deploy-time')['data-title']).to eq(deployment.created_at.to_time.in_time_zone.to_s(:medium))
     end
 
     context 'with stop action' do
@@ -38,11 +38,11 @@ feature 'Widget Deployments Header', feature: true, js: true do
       end
 
       scenario 'does show stop button' do
-        expect(page).to have_link('Stop environment')
+        expect(page).to have_button('Stop environment')
       end
 
       scenario 'does start build when stop button clicked' do
-        click_link('Stop environment')
+        click_button('Stop environment')
 
         expect(page).to have_content('close_app')
       end
@@ -51,7 +51,7 @@ feature 'Widget Deployments Header', feature: true, js: true do
         given(:role) { :reporter }
 
         scenario 'does not show stop button' do
-          expect(page).not_to have_link('Stop environment')
+          expect(page).not_to have_button('Stop environment')
         end
       end
     end
diff --git a/spec/features/merge_requests/widget_spec.rb b/spec/features/merge_requests/widget_spec.rb
index d918181a238..3fcdc9f2c61 100644
--- a/spec/features/merge_requests/widget_spec.rb
+++ b/spec/features/merge_requests/widget_spec.rb
@@ -30,6 +30,7 @@ describe 'Merge request', :feature, :js do
       wait_for_ajax
 
       expect(page).to have_selector('.accept-merge-request')
+      expect(find('.accept-merge-request')['disabled']).not_to be(true)
     end
   end
 
@@ -51,14 +52,15 @@ describe 'Merge request', :feature, :js do
 
       page.within('.mr-widget-heading') do
         expect(page).to have_content("Deployed to #{environment.name}")
-        expect(find('.js-environment-link')[:href]).to include(environment.formatted_external_url)
+        expect(find('.js-deploy-url')[:href]).to include(environment.formatted_external_url)
       end
     end
 
     it 'shows green accept merge request button' do
       # Wait for the `ci_status` and `merge_check` requests
       wait_for_ajax
-      expect(page).to have_selector('.accept-merge-request.btn-create')
+      expect(page).to have_selector('.accept-merge-request')
+      expect(find('.accept-merge-request')['disabled']).not_to be(true)
     end
   end
 
@@ -135,7 +137,28 @@ describe 'Merge request', :feature, :js do
     it 'has info button when MWBS button' do
       # Wait for the `ci_status` and `merge_check` requests
       wait_for_ajax
-      expect(page).to have_selector('.merge-when-pipeline-succeeds.btn-info')
+      expect(page).to have_selector('.accept-merge-request.btn-info')
+    end
+  end
+
+  context 'view merge request with MWPS enabled but automatically merge fails' do
+    before do
+      merge_request.update(
+        merge_when_pipeline_succeeds: true,
+        merge_user: merge_request.author,
+        merge_error: 'Something went wrong'
+      )
+
+      visit namespace_project_merge_request_path(project.namespace, project, merge_request)
+    end
+
+    it 'shows information about the merge error' do
+      # Wait for the `ci_status` and `merge_check` requests
+      wait_for_ajax
+
+      page.within('.mr-widget-body') do
+        expect(page).to have_content('Something went wrong')
+      end
     end
   end
 
@@ -164,11 +187,11 @@ describe 'Merge request', :feature, :js do
     before do
       allow_any_instance_of(Repository).to receive(:merge).and_return(false)
       visit namespace_project_merge_request_path(project.namespace, project, merge_request)
-      click_button 'Accept merge request'
-      wait_for_ajax
     end
 
     it 'updates the MR widget' do
+      click_button 'Merge'
+
       page.within('.mr-widget-body') do
         expect(page).to have_content('Conflicts detected during merge')
       end
diff --git a/spec/fixtures/api/schemas/entities/merge_request.json b/spec/fixtures/api/schemas/entities/merge_request.json
new file mode 100644
index 00000000000..0a7e0e2d5f2
--- /dev/null
+++ b/spec/fixtures/api/schemas/entities/merge_request.json
@@ -0,0 +1,98 @@
+{
+  "type": "object",
+  "properties" : {
+    "id": { "type": "integer" },
+    "iid": { "type": "integer" },
+    "assignee_id": { "type": ["integer", "null"] },
+    "author_id": { "type": "integer" },
+    "description": { "type": ["string", "null"] },
+    "lock_version": { "type": ["string", "null"] },
+    "milestone_id": { "type": ["string", "null"] },
+    "position": { "type": "integer" },
+    "state": { "type": "string" },
+    "title": { "type": "string" },
+    "updated_by_id": { "type": ["string", "null"] },
+    "created_at": { "type": "string" },
+    "updated_at": { "type": "string" },
+    "deleted_at": { "type": ["string", "null"] },
+    "time_estimate": { "type": "integer" },
+    "total_time_spent": { "type": "integer" },
+    "human_time_estimate": { "type": ["integer", "null"] },
+    "human_total_time_spent": { "type": ["integer", "null"] },
+    "in_progress_merge_commit_sha": { "type": ["string", "null"] },
+    "locked_at": { "type": ["string", "null"] },
+    "merge_error": { "type": ["string", "null"] },
+    "merge_commit_sha": { "type": ["string", "null"] },
+    "merge_params": { "type": ["object", "null"] },
+    "merge_status": { "type": "string" },
+    "merge_user_id": { "type": ["integer", "null"] },
+    "merge_when_pipeline_succeeds": { "type": "boolean" },
+    "source_branch": { "type": "string" },
+    "source_project_id": { "type": "integer" },
+    "target_branch": { "type": "string" },
+    "target_project_id": { "type": "integer" },
+    "merge_event": { "type": ["object", "null"] },
+    "closed_event": { "type": ["object", "null"] },
+    "author": { "type": ["object", "null"] },
+    "merge_user": { "type": ["object", "null"] },
+    "diff_head_sha": { "type": ["string", "null"] },
+    "diff_head_commit_short_id": { "type": ["string", "null"] },
+    "merge_commit_message": { "type": ["string", "null"] },
+    "pipeline": { "type": ["object", "null"] },
+    "work_in_progress": { "type": "boolean" },
+    "source_branch_exists": { "type": "boolean" },
+    "mergeable_discussions_state": { "type": "boolean" },
+    "conflicts_can_be_resolved_in_ui": { "type": "boolean" },
+    "branch_missing": { "type": "boolean" },
+    "has_conflicts": { "type": "boolean" },
+    "can_be_merged": { "type": "boolean" },
+    "project_archived": { "type": "boolean" },
+    "only_allow_merge_if_pipeline_succeeds": { "type": "boolean" },
+    "has_ci": { "type": "boolean" },
+    "ci_status": { "type": ["string", "null"] },
+    "issues_links": {
+      "type": "object",
+      "required": ["closing", "mentioned_but_not_closing", "assign_to_closing"],
+      "properties" : {
+        "closing": { "type": "string" },
+        "mentioned_but_not_closing": { "type": "string" },
+        "assign_to_closing": { "type": ["string", "null"] }
+      },
+      "additionalProperties": false
+    },
+    "source_branch_with_namespace_link": { "type": "string" },
+    "current_user": {
+      "type": "object",
+      "required": [
+        "can_remove_source_branch",
+        "can_revert_on_current_merge_request",
+        "can_cherry_pick_on_current_merge_request"
+      ],
+      "properties": {
+        "can_remove_source_branch": { "type": "boolean" },
+        "can_revert_on_current_merge_request": { "type": ["boolean", "null"] },
+        "can_cherry_pick_on_current_merge_request": { "type": ["boolean", "null"] }
+      },
+      "additionalProperties": false
+    },
+    "target_branch_commits_path": { "type": "string" },
+    "source_branch_path": { "type": "string" },
+    "conflict_resolution_path": { "type": ["string", "null"] },
+    "cancel_merge_when_pipeline_succeeds_path": { "type": "string" },
+    "create_issue_to_resolve_discussions_path": { "type": "string" },
+    "merge_path": { "type": "string" },
+    "cherry_pick_in_fork_path": { "type": ["string", "null"] },
+    "revert_in_fork_path": { "type": ["string", "null"] },
+    "email_patches_path": { "type": "string" },
+    "plain_diff_path": { "type": "string" },
+    "status_path": { "type": "string" },
+    "merge_check_path": { "type": "string" },
+    "ci_environments_status_path": { "type": "string" },
+    "merge_commit_message_with_description": { "type": "string" },
+    "diverged_commits_count": { "type": "integer" },
+    "commit_change_content_path": { "type": "string" },
+    "remove_wip_path": { "type": "string" },
+    "commits_count": { "type": "integer" }
+  },
+  "additionalProperties": false
+}
diff --git a/spec/fixtures/api/schemas/entities/merge_request_basic.json b/spec/fixtures/api/schemas/entities/merge_request_basic.json
new file mode 100644
index 00000000000..ea6364b878c
--- /dev/null
+++ b/spec/fixtures/api/schemas/entities/merge_request_basic.json
@@ -0,0 +1,14 @@
+{
+  "type": "object",
+  "properties" : {
+    "state": { "type": "string" },
+    "merge_status": { "type": "string" },
+    "source_branch_exists": { "type": "boolean" },
+    "time_estimate": { "type": "integer" },
+    "total_time_spent": { "type": "integer" },
+    "human_time_estimate": { "type": ["string", "null"] },
+    "human_total_time_spent": { "type": ["string", "null"] },
+    "merge_error": { "type": ["string", "null"] }
+  },
+  "additionalProperties": false
+}
diff --git a/spec/helpers/merge_requests_helper_spec.rb b/spec/helpers/merge_requests_helper_spec.rb
index 10681af5f7e..f2c9d927388 100644
--- a/spec/helpers/merge_requests_helper_spec.rb
+++ b/spec/helpers/merge_requests_helper_spec.rb
@@ -21,55 +21,6 @@ describe MergeRequestsHelper do
     end
   end
 
-  describe '#issues_sentence' do
-    let(:project) { create :project }
-
-    subject { issues_sentence(issues) }
-    let(:issues) do
-      [build(:issue, iid: 2, project: project),
-       build(:issue, iid: 3, project: project),
-       build(:issue, iid: 1, project: project)]
-    end
-
-    it do
-      @project = project
-
-      is_expected.to eq('#1, #2, and #3')
-    end
-
-    context 'for JIRA issues' do
-      let(:project) { create(:empty_project) }
-      let(:issues) do
-        [
-          ExternalIssue.new('JIRA-456', project),
-          ExternalIssue.new('FOOBAR-7890', project),
-          ExternalIssue.new('JIRA-123', project)
-        ]
-      end
-
-      it do
-        @project = project
-        is_expected.to eq('FOOBAR-7890, JIRA-123, and JIRA-456')
-      end
-    end
-
-    context 'for issues from multiple namespaces' do
-      let(:project) { create(:project) }
-      let(:other_project) { create(:project) }
-      let(:issues) do
-        [build(:issue, iid: 2, project: project),
-         build(:issue, iid: 3, project: other_project),
-         build(:issue, iid: 1, project: project)]
-      end
-
-      it do
-        @project = project
-
-        is_expected.to eq("#1, #2, and #{other_project.namespace.path}/#{other_project.path}#3")
-      end
-    end
-  end
-
   describe '#format_mr_branch_names' do
     describe 'within the same project' do
       let(:merge_request) { create(:merge_request) }
@@ -89,147 +40,4 @@ describe MergeRequestsHelper do
       it { is_expected.to eq([source_title, target_title]) }
     end
   end
-
-  describe '#mr_widget_refresh_url' do
-    let(:guest)         { create(:user) }
-    let(:project)       { create(:project, :public) }
-    let(:project_fork)  { Projects::ForkService.new(project, guest).execute }
-    let(:merge_request) { create(:merge_request, source_project: project_fork, target_project: project) }
-
-    it 'returns correct url for MR' do
-      expected_url = "#{project.path_with_namespace}/merge_requests/#{merge_request.iid}/merge_widget_refresh"
-
-      expect(mr_widget_refresh_url(merge_request)).to end_with(expected_url)
-    end
-
-    it 'returns empty string for nil' do
-      expect(mr_widget_refresh_url(nil)).to eq('')
-    end
-  end
-
-  describe '#mr_closes_issues' do
-    let(:user_1) { create(:user) }
-    let(:user_2) { create(:user) }
-
-    let(:project_1) { create(:project, :private, creator: user_1, namespace: user_1.namespace) }
-    let(:project_2) { create(:project, :private, creator: user_2, namespace: user_2.namespace) }
-
-    let(:issue_1) { create(:issue, project: project_1) }
-    let(:issue_2) { create(:issue, project: project_2) }
-
-    let(:merge_request) { create(:merge_request, source_project: project_1, target_project: project_1,) }
-
-    let(:merge_request) do
-      create(:merge_request,
-             source_project: project_1, target_project: project_1,
-             description: "Fixes #{issue_1.to_reference} Fixes #{issue_2.to_reference(project_1)}")
-    end
-
-    before do
-      project_1.team << [user_2, :developer]
-      project_2.team << [user_2, :developer]
-      allow(merge_request.project).to receive(:default_branch).and_return(merge_request.target_branch)
-      @merge_request = merge_request
-    end
-
-    context 'user without access to another private project' do
-      let(:current_user) { user_1 }
-
-      it 'cannot see that project\'s issue that will be closed on acceptance' do
-        expect(mr_closes_issues).to contain_exactly(issue_1)
-      end
-    end
-
-    context 'user with access to another private project' do
-      let(:current_user) { user_2 }
-
-      it 'can see that project\'s issue that will be closed on acceptance' do
-        expect(mr_closes_issues).to contain_exactly(issue_1, issue_2)
-      end
-    end
-  end
-
-  describe '#target_projects' do
-    let(:project) { create(:empty_project) }
-    let(:fork_project) { create(:empty_project, forked_from_project: project) }
-
-    context 'when target project has enabled merge requests' do
-      it 'returns the forked_from project' do
-        expect(target_projects(fork_project)).to contain_exactly(project, fork_project)
-      end
-    end
-
-    context 'when target project has disabled merge requests' do
-      it 'returns the forked project' do
-        project.project_feature.update(merge_requests_access_level: 0)
-
-        expect(target_projects(fork_project)).to contain_exactly(fork_project)
-      end
-    end
-  end
-
-  describe '#new_mr_path_from_push_event' do
-    subject(:url_params) { URI.decode_www_form(new_mr_path_from_push_event(event)).to_h }
-    let(:user) { create(:user) }
-    let(:project) { create(:empty_project, creator: user) }
-    let(:fork_project) { create(:project, forked_from_project: project, creator: user) }
-    let(:event) do
-      push_data = Gitlab::DataBuilder::Push.build_sample(fork_project, user)
-      create(:event, :pushed, project: fork_project, target: fork_project, author: user, data: push_data)
-    end
-
-    context 'when target project has enabled merge requests' do
-      it 'returns link to create merge request on source project' do
-        expect(url_params['merge_request[target_project_id]'].to_i).to eq(project.id)
-      end
-    end
-
-    context 'when target project has disabled merge requests' do
-      it 'returns link to create merge request on forked project' do
-        project.project_feature.update(merge_requests_access_level: 0)
-
-        expect(url_params['merge_request[target_project_id]'].to_i).to eq(fork_project.id)
-      end
-    end
-  end
-
-  describe '#mr_issues_mentioned_but_not_closing' do
-    let(:user_1) { create(:user) }
-    let(:user_2) { create(:user) }
-
-    let(:project_1) { create(:project, :private, creator: user_1, namespace: user_1.namespace) }
-    let(:project_2) { create(:project, :private, creator: user_2, namespace: user_2.namespace) }
-
-    let(:issue_1) { create(:issue, project: project_1) }
-    let(:issue_2) { create(:issue, project: project_2) }
-
-    let(:merge_request) do
-      create(:merge_request,
-             source_project: project_1, target_project: project_1,
-             description: "#{issue_1.to_reference} #{issue_2.to_reference(project_1)}")
-    end
-
-    before do
-      project_1.team << [user_2, :developer]
-      project_2.team << [user_2, :developer]
-      allow(merge_request.project).to receive(:default_branch).and_return(merge_request.target_branch)
-      @merge_request = merge_request
-    end
-
-    context 'user without access to another private project' do
-      let(:current_user) { user_1 }
-
-      it 'cannot see that project\'s issue that will be closed on acceptance' do
-        expect(mr_issues_mentioned_but_not_closing).to contain_exactly(issue_1)
-      end
-    end
-
-    context 'user with access to another private project' do
-      let(:current_user) { user_2 }
-
-      it 'can see that project\'s issue that will be closed on acceptance' do
-        expect(mr_issues_mentioned_but_not_closing).to contain_exactly(issue_1, issue_2)
-      end
-    end
-  end
 end
diff --git a/spec/javascripts/commit/pipelines/mock_data.js b/spec/javascripts/commit/pipelines/mock_data.js
index 82b00b4c1ec..10a60620f49 100644
--- a/spec/javascripts/commit/pipelines/mock_data.js
+++ b/spec/javascripts/commit/pipelines/mock_data.js
@@ -61,6 +61,7 @@ export default {
     tag: false,
     branch: true,
   },
+  coverage: '42.21',
   commit: {
     id: 'fbd79f04fa98717641deaaeb092a4d417237c2e4',
     short_id: 'fbd79f04',
diff --git a/spec/javascripts/fixtures/merge_requests.rb b/spec/javascripts/fixtures/merge_requests.rb
index 47d904b865b..a746a776548 100644
--- a/spec/javascripts/fixtures/merge_requests.rb
+++ b/spec/javascripts/fixtures/merge_requests.rb
@@ -16,6 +16,16 @@ describe Projects::MergeRequestsController, '(JavaScript fixtures)', type: :cont
       sha: merge_request.diff_head_sha
     )
   end
+  let(:path) { "files/ruby/popen.rb" }
+  let(:position) do
+    Gitlab::Diff::Position.new(
+      old_path: path,
+      new_path: path,
+      old_line: nil,
+      new_line: 14,
+      diff_refs: merge_request.diff_refs
+    )
+  end
 
   render_views
 
@@ -39,6 +49,12 @@ describe Projects::MergeRequestsController, '(JavaScript fixtures)', type: :cont
     render_merge_request(example.description, merged_merge_request)
   end
 
+  it 'merge_requests/diff_comment.html.raw' do |example|
+    create(:diff_note_on_merge_request, project: project, author: admin, position: position, noteable: merge_request)
+    create(:note_on_merge_request, author: admin, project: project, noteable: merge_request)
+    render_merge_request(example.description, merge_request)
+  end
+
   private
 
   def render_merge_request(fixture_file_name, merge_request)
diff --git a/spec/javascripts/merge_request_notes_spec.js b/spec/javascripts/merge_request_notes_spec.js
new file mode 100644
index 00000000000..e54acfa8e44
--- /dev/null
+++ b/spec/javascripts/merge_request_notes_spec.js
@@ -0,0 +1,61 @@
+/* global Notes */
+
+import 'vendor/autosize';
+import '~/gl_form';
+import '~/lib/utils/text_utility';
+import '~/render_gfm';
+import '~/render_math';
+import '~/notes';
+
+describe('Merge request notes', () => {
+  window.gon = window.gon || {};
+  window.gl = window.gl || {};
+  gl.utils = gl.utils || {};
+
+  const fixture = 'merge_requests/diff_comment.html.raw';
+  preloadFixtures(fixture);
+
+  beforeEach(() => {
+    loadFixtures(fixture);
+    gl.utils.disableButtonIfEmptyField = _.noop;
+    window.project_uploads_path = 'http://test.host/uploads';
+    $('body').data('page', 'projects:merge_requests:show');
+    window.gon.current_user_id = $('.note:last').data('author-id');
+
+    return new Notes('', []);
+  });
+
+  describe('up arrow', () => {
+    it('edits last comment when triggered in main form', () => {
+      const upArrowEvent = $.Event('keydown');
+      upArrowEvent.which = 38;
+
+      spyOnEvent('.note:last .js-note-edit', 'click');
+
+      $('.js-note-text').trigger(upArrowEvent);
+
+      expect('click').toHaveBeenTriggeredOn('.note:last .js-note-edit');
+    });
+
+    it('edits last comment in discussion when triggered in discussion form', (done) => {
+      const upArrowEvent = $.Event('keydown');
+      upArrowEvent.which = 38;
+
+      spyOnEvent('.note-discussion .js-note-edit', 'click');
+
+      $('.js-discussion-reply-button').click();
+
+      setTimeout(() => {
+        expect(
+          $('.note-discussion .js-note-text'),
+        ).toExist();
+
+        $('.note-discussion .js-note-text').trigger(upArrowEvent);
+
+        expect('click').toHaveBeenTriggeredOn('.note-discussion .js-note-edit');
+
+        done();
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/merge_request_widget_spec.js b/spec/javascripts/merge_request_widget_spec.js
deleted file mode 100644
index 88dae8c3e06..00000000000
--- a/spec/javascripts/merge_request_widget_spec.js
+++ /dev/null
@@ -1,199 +0,0 @@
-/* eslint-disable space-before-function-paren, quotes, comma-dangle, dot-notation, quote-props, no-var, max-len */
-
-require('~/merge_request_widget');
-require('~/smart_interval');
-require('~/lib/utils/datetime_utility');
-
-(function() {
-  describe('MergeRequestWidget', function() {
-    beforeEach(function() {
-      window.notifyPermissions = function() {};
-      window.notify = function() {};
-      this.opts = {
-        ci_status_url: "http://sampledomain.local/ci/getstatus",
-        ci_environments_status_url: "http://sampledomain.local/ci/getenvironmentsstatus",
-        ci_status: "",
-        ci_message: {
-          normal: "Build {{status}} for \"{{title}}\"",
-          preparing: "{{status}} build for \"{{title}}\""
-        },
-        ci_title: {
-          preparing: "{{status}} build",
-          normal: "Build {{status}}"
-        },
-        gitlab_icon: "gitlab_logo.png",
-        ci_pipeline: 80,
-        ci_sha: "12a34bc5",
-        builds_path: "http://sampledomain.local/sampleBuildsPath",
-        commits_path: "http://sampledomain.local/commits",
-        pipeline_path: "http://sampledomain.local/pipelines"
-      };
-      this["class"] = new window.gl.MergeRequestWidget(this.opts);
-    });
-
-    describe('getCIEnvironmentsStatus', function() {
-      beforeEach(function() {
-        this.ciEnvironmentsStatusData = [{
-          created_at: '2016-09-12T13:38:30.636Z',
-          environment_id: 1,
-          environment_name: 'env1',
-          external_url: 'https://test-url.com',
-          external_url_formatted: 'test-url.com'
-        }];
-
-        spyOn(jQuery, 'getJSON').and.callFake(function(req, cb) {
-          cb(this.ciEnvironmentsStatusData);
-        }.bind(this));
-      });
-
-      it('should call renderEnvironments when the environments property is set', function() {
-        const spy = spyOn(this.class, 'renderEnvironments').and.stub();
-        this.class.getCIEnvironmentsStatus();
-        expect(spy).toHaveBeenCalledWith(this.ciEnvironmentsStatusData);
-      });
-
-      it('should not call renderEnvironments when the environments property is not set', function() {
-        this.ciEnvironmentsStatusData = null;
-        const spy = spyOn(this.class, 'renderEnvironments').and.stub();
-        this.class.getCIEnvironmentsStatus();
-        expect(spy).not.toHaveBeenCalled();
-      });
-    });
-
-    describe('renderEnvironments', function() {
-      describe('should render correct timeago', function() {
-        beforeEach(function() {
-          this.environments = [{
-            id: 'test-environment-id',
-            url: 'testurl',
-            deployed_at: new Date().toISOString(),
-            deployed_at_formatted: true
-          }];
-        });
-
-        function getTimeagoText(template) {
-          var el = document.createElement('html');
-          el.innerHTML = template;
-          return el.querySelector('.js-environment-timeago').innerText.trim();
-        }
-
-        it('should render less than a minute ago text', function() {
-          spyOn(this.class.$widgetBody, 'before').and.callFake(function(template) {
-            expect(getTimeagoText(template)).toBe('less than a minute ago.');
-          });
-
-          this.class.renderEnvironments(this.environments);
-        });
-
-        it('should render about an hour ago text', function() {
-          var oneHourAgo = new Date();
-          oneHourAgo.setHours(oneHourAgo.getHours() - 1);
-
-          this.environments[0].deployed_at = oneHourAgo.toISOString();
-          spyOn(this.class.$widgetBody, 'before').and.callFake(function(template) {
-            expect(getTimeagoText(template)).toBe('about an hour ago.');
-          });
-
-          this.class.renderEnvironments(this.environments);
-        });
-
-        it('should render about 2 hours ago text', function() {
-          var twoHoursAgo = new Date();
-          twoHoursAgo.setHours(twoHoursAgo.getHours() - 2);
-
-          this.environments[0].deployed_at = twoHoursAgo.toISOString();
-          spyOn(this.class.$widgetBody, 'before').and.callFake(function(template) {
-            expect(getTimeagoText(template)).toBe('about 2 hours ago.');
-          });
-
-          this.class.renderEnvironments(this.environments);
-        });
-      });
-    });
-
-    describe('mergeInProgress', function() {
-      it('should display error with h4 tag', function() {
-        spyOn(this.class.$widgetBody, 'html').and.callFake(function(html) {
-          expect(html).toBe('<h4>Sorry, something went wrong.</h4>');
-        });
-        spyOn($, 'ajax').and.callFake(function(e) {
-          e.success({ merge_error: 'Sorry, something went wrong.' });
-        });
-        this.class.mergeInProgress(null);
-      });
-    });
-
-    describe('getCIStatus', function() {
-      beforeEach(function() {
-        this.ciStatusData = {
-          "title": "Sample MR title",
-          "pipeline": 80,
-          "sha": "12a34bc5",
-          "status": "success",
-          "coverage": 98
-        };
-
-        spyOn(jQuery, 'getJSON').and.callFake((function(_this) {
-          return function(req, cb) {
-            return cb(_this.ciStatusData);
-          };
-        })(this));
-      });
-      it('should call showCIStatus even if a notification should not be displayed', function() {
-        var spy;
-        spy = spyOn(this["class"], 'showCIStatus').and.stub();
-        spyOn(gl.utils, 'setCiStatusFavicon').and.callFake(() => {});
-        this["class"].getCIStatus(false);
-        return expect(spy).toHaveBeenCalledWith(this.ciStatusData.status);
-      });
-      it('should call showCIStatus when a notification should be displayed', function() {
-        var spy;
-        spy = spyOn(this["class"], 'showCIStatus').and.stub();
-        spyOn(gl.utils, 'setCiStatusFavicon').and.callFake(() => {});
-        this["class"].getCIStatus(true);
-        return expect(spy).toHaveBeenCalledWith(this.ciStatusData.status);
-      });
-      it('should call showCICoverage when the coverage rate is set', function() {
-        var spy;
-        spy = spyOn(this["class"], 'showCICoverage').and.stub();
-        spyOn(gl.utils, 'setCiStatusFavicon').and.callFake(() => {});
-        this["class"].getCIStatus(false);
-        return expect(spy).toHaveBeenCalledWith(this.ciStatusData.coverage);
-      });
-      it('should not call showCICoverage when the coverage rate is not set', function() {
-        var spy;
-        this.ciStatusData.coverage = null;
-        spy = spyOn(this["class"], 'showCICoverage').and.stub();
-        spyOn(gl.utils, 'setCiStatusFavicon').and.callFake(() => {});
-        this["class"].getCIStatus(false);
-        return expect(spy).not.toHaveBeenCalled();
-      });
-      it('should not display a notification on the first check after the widget has been created', function() {
-        var spy;
-        spy = spyOn(window, 'notify');
-        spyOn(gl.utils, 'setCiStatusFavicon').and.callFake(() => {});
-        this["class"] = new window.gl.MergeRequestWidget(this.opts);
-        this["class"].getCIStatus(true);
-        return expect(spy).not.toHaveBeenCalled();
-      });
-      it('should update the pipeline URL when the pipeline changes', function() {
-        var spy;
-        spy = spyOn(this["class"], 'updatePipelineUrls').and.stub();
-        spyOn(gl.utils, 'setCiStatusFavicon').and.callFake(() => {});
-        this["class"].getCIStatus(false);
-        this.ciStatusData.pipeline += 1;
-        this["class"].getCIStatus(false);
-        return expect(spy).toHaveBeenCalled();
-      });
-      it('should update the commit URL when the sha changes', function() {
-        var spy;
-        spy = spyOn(this["class"], 'updateCommitUrls').and.stub();
-        spyOn(gl.utils, 'setCiStatusFavicon').and.callFake(() => {});
-        this["class"].getCIStatus(false);
-        this.ciStatusData.sha = "9b50b99a";
-        this["class"].getCIStatus(false);
-        return expect(spy).toHaveBeenCalled();
-      });
-    });
-  });
-}).call(window);
diff --git a/spec/javascripts/merged_buttons_spec.js b/spec/javascripts/merged_buttons_spec.js
deleted file mode 100644
index b5c5e60dd97..00000000000
--- a/spec/javascripts/merged_buttons_spec.js
+++ /dev/null
@@ -1,44 +0,0 @@
-/* global MergedButtons */
-
-import '~/merged_buttons';
-
-describe('MergedButtons', () => {
-  const fixturesPath = 'merge_requests/merged_merge_request.html.raw';
-  preloadFixtures(fixturesPath);
-
-  beforeEach(() => {
-    loadFixtures(fixturesPath);
-    this.mergedButtons = new MergedButtons();
-    this.$removeBranchWidget = $('.remove_source_branch_widget:not(.failed)');
-    this.$removeBranchProgress = $('.remove_source_branch_in_progress');
-    this.$removeBranchFailed = $('.remove_source_branch_widget.failed');
-    this.$removeBranchButton = $('.remove_source_branch');
-  });
-
-  describe('removeSourceBranch', () => {
-    it('shows loader', () => {
-      $('.remove_source_branch').trigger('click');
-      expect(this.$removeBranchProgress).toBeVisible();
-      expect(this.$removeBranchWidget).not.toBeVisible();
-    });
-  });
-
-  describe('removeBranchSuccess', () => {
-    it('refreshes page when branch removed', () => {
-      spyOn(gl.utils, 'refreshCurrentPage').and.stub();
-      const response = { status: 200 };
-      this.$removeBranchButton.trigger('ajax:success', response, 'xhr');
-      expect(gl.utils.refreshCurrentPage).toHaveBeenCalled();
-    });
-  });
-
-  describe('removeBranchError', () => {
-    it('shows error message', () => {
-      const response = { status: 500 };
-      this.$removeBranchButton.trigger('ajax:error', response, 'xhr');
-      expect(this.$removeBranchFailed).toBeVisible();
-      expect(this.$removeBranchProgress).not.toBeVisible();
-      expect(this.$removeBranchWidget).not.toBeVisible();
-    });
-  });
-});
diff --git a/spec/javascripts/test_bundle.js b/spec/javascripts/test_bundle.js
index 92428fd501c..0464b5d2329 100644
--- a/spec/javascripts/test_bundle.js
+++ b/spec/javascripts/test_bundle.js
@@ -55,7 +55,6 @@ if (process.env.BABEL_ENV === 'coverage') {
     './merge_conflicts/merge_conflicts_bundle.js',
     './merge_conflicts/components/inline_conflict_lines.js',
     './merge_conflicts/components/parallel_conflict_lines.js',
-    './merge_request_widget/ci_bundle.js',
     './monitoring/monitoring_bundle.js',
     './network/network_bundle.js',
     './network/branch_graph.js',
diff --git a/spec/javascripts/vue_mr_widget/components/mr_widget_author_spec.js b/spec/javascripts/vue_mr_widget/components/mr_widget_author_spec.js
new file mode 100644
index 00000000000..a750bc78f36
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/mr_widget_author_spec.js
@@ -0,0 +1,39 @@
+import Vue from 'vue';
+import authorComponent from '~/vue_merge_request_widget/components/mr_widget_author';
+
+const author = {
+  webUrl: 'http://foo.bar',
+  avatarUrl: 'http://gravatar.com/foo',
+  name: 'fatihacet',
+};
+const createComponent = () => {
+  const Component = Vue.extend(authorComponent);
+
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { author },
+  });
+};
+
+describe('MRWidgetAuthor', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const authorProp = authorComponent.props.author;
+
+      expect(authorProp).toBeDefined();
+      expect(authorProp.type instanceof Object).toBeTruthy();
+      expect(authorProp.required).toBeTruthy();
+    });
+  });
+
+  describe('template', () => {
+    it('should have correct elements', () => {
+      const el = createComponent().$el;
+
+      expect(el.tagName).toEqual('A');
+      expect(el.getAttribute('href')).toEqual(author.webUrl);
+      expect(el.querySelector('img').getAttribute('src')).toEqual(author.avatarUrl);
+      expect(el.querySelector('.author').innerText.trim()).toEqual(author.name);
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/mr_widget_author_time_spec.js b/spec/javascripts/vue_mr_widget/components/mr_widget_author_time_spec.js
new file mode 100644
index 00000000000..515ddcbb875
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/mr_widget_author_time_spec.js
@@ -0,0 +1,61 @@
+import Vue from 'vue';
+import authorTimeComponent from '~/vue_merge_request_widget/components/mr_widget_author_time';
+
+const props = {
+  actionText: 'Merged by',
+  author: {
+    webUrl: 'http://foo.bar',
+    avatarUrl: 'http://gravatar.com/foo',
+    name: 'fatihacet',
+  },
+  dateTitle: '2017-03-23T23:02:00.807Z',
+  dateReadable: '12 hours ago',
+};
+const createComponent = () => {
+  const Component = Vue.extend(authorTimeComponent);
+
+  return new Component({
+    el: document.createElement('div'),
+    propsData: props,
+  });
+};
+
+describe('MRWidgetAuthorTime', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { actionText, author, dateTitle, dateReadable } = authorTimeComponent.props;
+      const ActionTextClass = actionText.type;
+      const DateTitleClass = dateTitle.type;
+      const DateReadableClass = dateReadable.type;
+
+      expect(new ActionTextClass() instanceof String).toBeTruthy();
+      expect(actionText.required).toBeTruthy();
+
+      expect(author.type instanceof Object).toBeTruthy();
+      expect(author.required).toBeTruthy();
+
+      expect(new DateTitleClass() instanceof String).toBeTruthy();
+      expect(dateTitle.required).toBeTruthy();
+
+      expect(new DateReadableClass() instanceof String).toBeTruthy();
+      expect(dateReadable.required).toBeTruthy();
+    });
+  });
+
+  describe('components', () => {
+    it('should have components', () => {
+      expect(authorTimeComponent.components['mr-widget-author']).toBeDefined();
+    });
+  });
+
+  describe('template', () => {
+    it('should have correct elements', () => {
+      const el = createComponent().$el;
+
+      expect(el.tagName).toEqual('H4');
+      expect(el.querySelector('a').getAttribute('href')).toEqual(props.author.webUrl);
+      expect(el.querySelector('time').innerText).toContain(props.dateReadable);
+      expect(el.querySelector('time').getAttribute('title')).toEqual(props.dateTitle);
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/mr_widget_deployment_spec.js b/spec/javascripts/vue_mr_widget/components/mr_widget_deployment_spec.js
new file mode 100644
index 00000000000..3d5f71babfb
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/mr_widget_deployment_spec.js
@@ -0,0 +1,184 @@
+import Vue from 'vue';
+import deploymentComponent from '~/vue_merge_request_widget/components/mr_widget_deployment';
+import MRWidgetService from '~/vue_merge_request_widget/services/mr_widget_service';
+import { statusClassToSvgMap } from '~/vue_shared/pipeline_svg_icons';
+
+const deploymentMockData = [
+  {
+    id: 15,
+    name: 'review/diplo',
+    url: '/root/acets-review-apps/environments/15',
+    stop_url: '/root/acets-review-apps/environments/15/stop',
+    external_url: 'http://diplo.',
+    external_url_formatted: 'diplo.',
+    deployed_at: '2017-03-22T22:44:42.258Z',
+    deployed_at_formatted: 'Mar 22, 2017 10:44pm',
+  },
+];
+const createComponent = () => {
+  const Component = Vue.extend(deploymentComponent);
+  const mr = {
+    deployments: deploymentMockData,
+  };
+  const service = {};
+
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { mr, service },
+  });
+};
+
+describe('MRWidgetDeployment', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { mr, service } = deploymentComponent.props;
+
+      expect(mr.type instanceof Object).toBeTruthy();
+      expect(mr.required).toBeTruthy();
+
+      expect(service.type instanceof Object).toBeTruthy();
+      expect(service.required).toBeTruthy();
+    });
+  });
+
+  describe('computed', () => {
+    describe('svg', () => {
+      it('should have the proper SVG icon', () => {
+        const vm = createComponent(deploymentMockData);
+        expect(vm.svg).toEqual(statusClassToSvgMap.icon_status_success);
+      });
+    });
+  });
+
+  describe('methods', () => {
+    let vm = createComponent();
+    const deployment = deploymentMockData[0];
+
+    describe('formatDate', () => {
+      it('should work', () => {
+        const readable = gl.utils.getTimeago().format(deployment.deployed_at);
+        expect(vm.formatDate(deployment.deployed_at)).toEqual(readable);
+      });
+    });
+
+    describe('hasExternalUrls', () => {
+      it('should return true', () => {
+        expect(vm.hasExternalUrls(deployment)).toBeTruthy();
+      });
+
+      it('should return false when there is not enough information', () => {
+        expect(vm.hasExternalUrls()).toBeFalsy();
+        expect(vm.hasExternalUrls({ external_url: 'Diplo' })).toBeFalsy();
+        expect(vm.hasExternalUrls({ external_url_formatted: 'Diplo' })).toBeFalsy();
+      });
+    });
+
+    describe('hasDeploymentTime', () => {
+      it('should return true', () => {
+        expect(vm.hasDeploymentTime(deployment)).toBeTruthy();
+      });
+
+      it('should return false when there is not enough information', () => {
+        expect(vm.hasDeploymentTime()).toBeFalsy();
+        expect(vm.hasDeploymentTime({ deployed_at: 'Diplo' })).toBeFalsy();
+        expect(vm.hasDeploymentTime({ deployed_at_formatted: 'Diplo' })).toBeFalsy();
+      });
+    });
+
+    describe('hasDeploymentMeta', () => {
+      it('should return true', () => {
+        expect(vm.hasDeploymentMeta(deployment)).toBeTruthy();
+      });
+
+      it('should return false when there is not enough information', () => {
+        expect(vm.hasDeploymentMeta()).toBeFalsy();
+        expect(vm.hasDeploymentMeta({ url: 'Diplo' })).toBeFalsy();
+        expect(vm.hasDeploymentMeta({ name: 'Diplo' })).toBeFalsy();
+      });
+    });
+
+    describe('stopEnvironment', () => {
+      const url = '/foo/bar';
+      const returnPromise = () => new Promise((resolve) => {
+        resolve({
+          json() {
+            return {
+              redirect_url: url,
+            };
+          },
+        });
+      });
+      const mockStopEnvironment = () => {
+        vm.stopEnvironment(deploymentMockData);
+        return vm;
+      };
+
+      it('should show a confirm dialog and call service.stopEnvironment when confirmed', (done) => {
+        spyOn(window, 'confirm').and.returnValue(true);
+        spyOn(MRWidgetService, 'stopEnvironment').and.returnValue(returnPromise(true));
+        spyOn(gl.utils, 'visitUrl').and.returnValue(true);
+        vm = mockStopEnvironment();
+
+        expect(window.confirm).toHaveBeenCalled();
+        expect(MRWidgetService.stopEnvironment).toHaveBeenCalledWith(deploymentMockData.stop_url);
+        setTimeout(() => {
+          expect(gl.utils.visitUrl).toHaveBeenCalledWith(url);
+          done();
+        }, 333);
+      });
+
+      it('should show a confirm dialog but should not work if the dialog is rejected', () => {
+        spyOn(window, 'confirm').and.returnValue(false);
+        spyOn(MRWidgetService, 'stopEnvironment').and.returnValue(returnPromise(false));
+        vm = mockStopEnvironment();
+
+        expect(window.confirm).toHaveBeenCalled();
+        expect(MRWidgetService.stopEnvironment).not.toHaveBeenCalled();
+      });
+    });
+  });
+
+  describe('template', () => {
+    let vm;
+    let el;
+    const [deployment] = deploymentMockData;
+
+    beforeEach(() => {
+      vm = createComponent(deploymentMockData);
+      el = vm.$el;
+    });
+
+    it('should render template elements correctly', () => {
+      expect(el.classList.contains('mr-widget-heading')).toBeTruthy();
+      expect(el.querySelector('.js-icon-link')).toBeDefined();
+      expect(el.querySelector('.js-deploy-meta').getAttribute('href')).toEqual(deployment.url);
+      expect(el.querySelector('.js-deploy-meta').innerText).toContain(deployment.name);
+      expect(el.querySelector('.js-deploy-url').getAttribute('href')).toEqual(deployment.external_url);
+      expect(el.querySelector('.js-deploy-url').innerText).toContain(deployment.external_url_formatted);
+      expect(el.querySelector('.js-deploy-time').innerText).toContain(vm.formatDate(deployment.deployed_at));
+      expect(el.querySelector('button')).toBeDefined();
+    });
+
+    it('should list multiple deployments', (done) => {
+      vm.mr.deployments.push(deployment);
+      vm.mr.deployments.push(deployment);
+
+      Vue.nextTick(() => {
+        expect(el.querySelectorAll('.ci-widget').length).toEqual(3);
+        done();
+      });
+    });
+
+    it('should not have some elements when there is not enough data', (done) => {
+      vm.mr.deployments = [{}];
+
+      Vue.nextTick(() => {
+        expect(el.querySelectorAll('.js-deploy-meta').length).toEqual(0);
+        expect(el.querySelectorAll('.js-deploy-url').length).toEqual(0);
+        expect(el.querySelectorAll('.js-deploy-time').length).toEqual(0);
+        expect(el.querySelectorAll('.button').length).toEqual(0);
+        done();
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/mr_widget_header_spec.js b/spec/javascripts/vue_mr_widget/components/mr_widget_header_spec.js
new file mode 100644
index 00000000000..48f816c8460
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/mr_widget_header_spec.js
@@ -0,0 +1,95 @@
+import Vue from 'vue';
+import headerComponent from '~/vue_merge_request_widget/components/mr_widget_header';
+
+const createComponent = (mr) => {
+  const Component = Vue.extend(headerComponent);
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { mr },
+  });
+};
+
+describe('MRWidgetHeader', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { mr } = headerComponent.props;
+
+      expect(mr.type instanceof Object).toBeTruthy();
+      expect(mr.required).toBeTruthy();
+    });
+  });
+
+  describe('computed', () => {
+    let vm;
+    beforeEach(() => {
+      vm = createComponent({
+        divergedCommitsCount: 12,
+        sourceBranch: 'mr-widget-refactor',
+        sourceBranchLink: '/foo/bar/mr-widget-refactor',
+        targetBranch: 'master',
+      });
+    });
+
+    it('shouldShowCommitsBehindText', () => {
+      expect(vm.shouldShowCommitsBehindText).toBeTruthy();
+
+      vm.mr.divergedCommitsCount = 0;
+      expect(vm.shouldShowCommitsBehindText).toBeFalsy();
+    });
+
+    it('commitsText', () => {
+      expect(vm.commitsText).toEqual('commits');
+
+      vm.mr.divergedCommitsCount = 1;
+      expect(vm.commitsText).toEqual('commit');
+    });
+  });
+
+  describe('template', () => {
+    let vm;
+    let el;
+    const mr = {
+      divergedCommitsCount: 12,
+      sourceBranch: 'mr-widget-refactor',
+      sourceBranchLink: '/foo/bar/mr-widget-refactor',
+      targetBranch: 'master',
+      isOpen: true,
+      emailPatchesPath: '/mr/email-patches',
+      plainDiffPath: '/mr/plainDiffPath',
+    };
+
+    beforeEach(() => {
+      vm = createComponent(mr);
+      el = vm.$el;
+    });
+
+    it('should render template elements correctly', () => {
+      expect(el.classList.contains('mr-source-target')).toBeTruthy();
+      expect(el.querySelectorAll('.label-branch')[0].textContent).toContain(mr.sourceBranch);
+      expect(el.querySelectorAll('.label-branch')[1].textContent).toContain(mr.targetBranch);
+      expect(el.querySelector('.diverged-commits-count').textContent).toContain('12 commits behind');
+
+      expect(el.textContent).toContain('Check out branch');
+      expect(el.querySelectorAll('.dropdown li a')[0].getAttribute('href')).toEqual(mr.emailPatchesPath);
+      expect(el.querySelectorAll('.dropdown li a')[1].getAttribute('href')).toEqual(mr.plainDiffPath);
+    });
+
+    it('should not have right action links if the MR state is not open', (done) => {
+      vm.mr.isOpen = false;
+      Vue.nextTick(() => {
+        expect(el.textContent).not.toContain('Check out branch');
+        expect(el.querySelectorAll('.dropdown li a').length).toEqual(0);
+        done();
+      });
+    });
+
+    it('should not render diverged commits count if the MR has no diverged commits', (done) => {
+      vm.mr.divergedCommitsCount = null;
+      Vue.nextTick(() => {
+        expect(el.textContent).not.toContain('commits behind');
+        expect(el.querySelectorAll('.diverged-commits-count').length).toEqual(0);
+        done();
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/mr_widget_merge_help_spec.js b/spec/javascripts/vue_mr_widget/components/mr_widget_merge_help_spec.js
new file mode 100644
index 00000000000..4da4fc82c26
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/mr_widget_merge_help_spec.js
@@ -0,0 +1,51 @@
+import Vue from 'vue';
+import mergeHelpComponent from '~/vue_merge_request_widget/components/mr_widget_merge_help';
+
+const props = {
+  missingBranch: 'this-is-not-the-branch-you-are-looking-for',
+};
+const text = `If the ${props.missingBranch} branch exists in your local repository`;
+
+const createComponent = () => {
+  const Component = Vue.extend(mergeHelpComponent);
+  return new Component({
+    el: document.createElement('div'),
+    propsData: props,
+  });
+};
+
+describe('MRWidgetMergeHelp', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { missingBranch } = mergeHelpComponent.props;
+      const MissingBranchTypeClass = missingBranch.type;
+
+      expect(new MissingBranchTypeClass() instanceof String).toBeTruthy();
+      expect(missingBranch.required).toBeFalsy();
+      expect(missingBranch.default).toEqual('');
+    });
+  });
+
+  describe('template', () => {
+    let vm;
+    let el;
+
+    beforeEach(() => {
+      vm = createComponent();
+      el = vm.$el;
+    });
+
+    it('should have the correct elements', () => {
+      expect(el.classList.contains('mr-widget-help')).toBeTruthy();
+      expect(el.textContent).toContain(text);
+    });
+
+    it('should not show missing branch name if missingBranch props is not provided', (done) => {
+      vm.missingBranch = null;
+      Vue.nextTick(() => {
+        expect(el.textContent).not.toContain(text);
+        done();
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/mr_widget_pipeline_spec.js b/spec/javascripts/vue_mr_widget/components/mr_widget_pipeline_spec.js
new file mode 100644
index 00000000000..1b418c7dfcf
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/mr_widget_pipeline_spec.js
@@ -0,0 +1,131 @@
+import Vue from 'vue';
+import { statusClassToSvgMap } from '~/vue_shared/pipeline_svg_icons';
+import pipelineComponent from '~/vue_merge_request_widget/components/mr_widget_pipeline';
+import mockData from '../mock_data';
+
+const createComponent = (mr) => {
+  const Component = Vue.extend(pipelineComponent);
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { mr },
+  });
+};
+
+describe('MRWidgetPipeline', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { mr } = pipelineComponent.props;
+
+      expect(mr.type instanceof Object).toBeTruthy();
+      expect(mr.required).toBeTruthy();
+    });
+  });
+
+  describe('components', () => {
+    it('should have components added', () => {
+      expect(pipelineComponent.components['pipeline-stage']).toBeDefined();
+      expect(pipelineComponent.components['pipeline-status-icon']).toBeDefined();
+    });
+  });
+
+  describe('computed', () => {
+    describe('svg', () => {
+      it('should have the proper SVG icon', () => {
+        const vm = createComponent({ pipeline: mockData.pipeline });
+
+        expect(vm.svg).toEqual(statusClassToSvgMap.icon_status_failed);
+      });
+    });
+
+    describe('hasCIError', () => {
+      it('should return false when there is no CI error', () => {
+        const vm = createComponent({
+          pipeline: mockData.pipeline,
+          hasCI: true,
+          ciStatus: 'success',
+        });
+
+        expect(vm.hasCIError).toBeFalsy();
+      });
+
+      it('should return true when there is a CI error', () => {
+        const vm = createComponent({
+          pipeline: mockData.pipeline,
+          hasCI: true,
+          ciStatus: null,
+        });
+
+        expect(vm.hasCIError).toBeTruthy();
+      });
+    });
+  });
+
+  describe('template', () => {
+    let vm;
+    let el;
+    const { pipeline } = mockData;
+    const mr = {
+      hasCI: true,
+      ciStatus: 'success',
+      pipelineDetailedStatus: pipeline.details.status,
+      pipeline,
+    };
+
+    beforeEach(() => {
+      vm = createComponent(mr);
+      el = vm.$el;
+    });
+
+    it('should render template elements correctly', () => {
+      expect(el.classList.contains('mr-widget-heading')).toBeTruthy();
+      expect(el.querySelectorAll('.ci-status-icon.ci-status-icon-success').length).toEqual(1);
+      expect(el.querySelector('.pipeline-id').textContent).toContain(`#${pipeline.id}`);
+      expect(el.innerText).toContain('passed');
+      expect(el.innerText).toContain('with stages');
+      expect(el.querySelector('.pipeline-id').getAttribute('href')).toEqual(pipeline.path);
+      expect(el.querySelectorAll('.stage-container').length).toEqual(2);
+      expect(el.querySelector('.js-ci-error')).toEqual(null);
+      expect(el.querySelector('.js-commit-link').getAttribute('href')).toEqual(pipeline.commit.commit_path);
+      expect(el.querySelector('.js-commit-link').textContent).toContain(pipeline.commit.short_id);
+      expect(el.querySelector('.js-mr-coverage').textContent).toContain(`Coverage ${pipeline.coverage}%.`);
+    });
+
+    it('should list single stage', (done) => {
+      pipeline.details.stages.splice(0, 1);
+
+      Vue.nextTick(() => {
+        expect(el.querySelectorAll('.stage-container button').length).toEqual(1);
+        expect(el.innerText).toContain('with stage');
+        done();
+      });
+    });
+
+    it('should not have stages when there is no stage', (done) => {
+      vm.mr.pipeline.details.stages = [];
+
+      Vue.nextTick(() => {
+        expect(el.querySelectorAll('.stage-container button').length).toEqual(0);
+        done();
+      });
+    });
+
+    it('should not have coverage text when pipeline has no coverage info', (done) => {
+      vm.mr.pipeline.coverage = null;
+
+      Vue.nextTick(() => {
+        expect(el.querySelector('.js-mr-coverage')).toEqual(null);
+        done();
+      });
+    });
+
+    it('should show CI error when there is a CI error', (done) => {
+      vm.mr.ciStatus = null;
+
+      Vue.nextTick(() => {
+        expect(el.querySelectorAll('.js-ci-error').length).toEqual(1);
+        expect(el.innerText).toContain('Could not connect to the CI server');
+        done();
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/mr_widget_related_links_spec.js b/spec/javascripts/vue_mr_widget/components/mr_widget_related_links_spec.js
new file mode 100644
index 00000000000..f6e0c3dfb74
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/mr_widget_related_links_spec.js
@@ -0,0 +1,138 @@
+import Vue from 'vue';
+import relatedLinksComponent from '~/vue_merge_request_widget/components/mr_widget_related_links';
+
+const createComponent = (data) => {
+  const Component = Vue.extend(relatedLinksComponent);
+
+  return new Component({
+    el: document.createElement('div'),
+    propsData: data,
+  });
+};
+
+describe('MRWidgetRelatedLinks', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { relatedLinks } = relatedLinksComponent.props;
+
+      expect(relatedLinks).toBeDefined();
+      expect(relatedLinks.type instanceof Object).toBeTruthy();
+      expect(relatedLinks.required).toBeTruthy();
+    });
+  });
+
+  describe('computed', () => {
+    describe('hasLinks', () => {
+      it('should return correct value when we have links reference', () => {
+        const data = {
+          relatedLinks: {
+            closing: '/foo',
+            mentioned: '/foo',
+            assignToMe: '/foo',
+          },
+        };
+        const vm = createComponent(data);
+        expect(vm.hasLinks).toBeTruthy();
+
+        vm.relatedLinks.closing = null;
+        expect(vm.hasLinks).toBeTruthy();
+
+        vm.relatedLinks.mentioned = null;
+        expect(vm.hasLinks).toBeTruthy();
+
+        vm.relatedLinks.assignToMe = null;
+        expect(vm.hasLinks).toBeFalsy();
+      });
+    });
+  });
+
+  describe('methods', () => {
+    const data = {
+      relatedLinks: {
+        closing: '<a href="#">#23</a> and <a>#42</a>',
+        mentioned: '<a href="#">#7</a>',
+      },
+    };
+    const vm = createComponent(data);
+
+    describe('hasMultipleIssues', () => {
+      it('should return true if the given text has multiple issues', () => {
+        expect(vm.hasMultipleIssues(data.relatedLinks.closing)).toBeTruthy();
+      });
+
+      it('should return false if the given text has one issue', () => {
+        expect(vm.hasMultipleIssues(data.relatedLinks.mentioned)).toBeFalsy();
+      });
+    });
+
+    describe('issueLabel', () => {
+      it('should return true if the given text has multiple issues', () => {
+        expect(vm.issueLabel('closing')).toEqual('issues');
+      });
+
+      it('should return false if the given text has one issue', () => {
+        expect(vm.issueLabel('mentioned')).toEqual('issue');
+      });
+    });
+
+    describe('verbLabel', () => {
+      it('should return true if the given text has multiple issues', () => {
+        expect(vm.verbLabel('closing')).toEqual('are');
+      });
+
+      it('should return false if the given text has one issue', () => {
+        expect(vm.verbLabel('mentioned')).toEqual('is');
+      });
+    });
+  });
+
+  describe('template', () => {
+    it('should have only have closing issues text', () => {
+      const vm = createComponent({
+        relatedLinks: {
+          closing: '<a href="#">#23</a> and <a>#42</a>',
+        },
+      });
+      const content = vm.$el.textContent.replace(/\n(\s)+/g, ' ').trim();
+
+      expect(content).toContain('Closes issues #23 and #42');
+      expect(content).not.toContain('mentioned');
+    });
+
+    it('should have only have mentioned issues text', () => {
+      const vm = createComponent({
+        relatedLinks: {
+          mentioned: '<a href="#">#7</a>',
+        },
+      });
+
+      expect(vm.$el.innerText).toContain('issue #7');
+      expect(vm.$el.innerText).toContain('is mentioned but will not be closed.');
+      expect(vm.$el.innerText).not.toContain('Closes');
+    });
+
+    it('should have closing and mentioned issues at the same time', () => {
+      const vm = createComponent({
+        relatedLinks: {
+          closing: '<a href="#">#7</a>',
+          mentioned: '<a href="#">#23</a> and <a>#42</a>',
+        },
+      });
+      const content = vm.$el.textContent.replace(/\n(\s)+/g, ' ').trim();
+
+      expect(content).toContain('Closes issue #7.');
+      expect(content).toContain('issues #23 and #42');
+      expect(content).toContain('are mentioned but will not be closed.');
+    });
+
+    it('should have assing issues link', () => {
+      const vm = createComponent({
+        relatedLinks: {
+          assignToMe: '<a href="#">Assign yourself to these issues</a>',
+        },
+      });
+
+      expect(vm.$el.innerText).toContain('Assign yourself to these issues');
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_archived_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_archived_spec.js
new file mode 100644
index 00000000000..cac2f561a0b
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_archived_spec.js
@@ -0,0 +1,18 @@
+import Vue from 'vue';
+import archivedComponent from '~/vue_merge_request_widget/components/states/mr_widget_archived';
+
+describe('MRWidgetArchived', () => {
+  describe('template', () => {
+    it('should have correct elements', () => {
+      const Component = Vue.extend(archivedComponent);
+      const el = new Component({
+        el: document.createElement('div'),
+      }).$el;
+
+      expect(el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(el.querySelector('button').classList.contains('btn-success')).toBeTruthy();
+      expect(el.querySelector('button').disabled).toBeTruthy();
+      expect(el.innerText).toContain('This project is archived, write access has been disabled.');
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_auto_merge_failed_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_auto_merge_failed_spec.js
new file mode 100644
index 00000000000..47b4ba893e0
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_auto_merge_failed_spec.js
@@ -0,0 +1,32 @@
+import Vue from 'vue';
+import autoMergeFailedComponent from '~/vue_merge_request_widget/components/states/mr_widget_auto_merge_failed';
+
+const mergeError = 'This is the merge error';
+
+describe('MRWidgetAutoMergeFailed', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const mrProp = autoMergeFailedComponent.props.mr;
+
+      expect(mrProp.type instanceof Object).toBeTruthy();
+      expect(mrProp.required).toBeTruthy();
+    });
+  });
+
+  describe('template', () => {
+    const Component = Vue.extend(autoMergeFailedComponent);
+    const vm = new Component({
+      el: document.createElement('div'),
+      propsData: {
+        mr: { mergeError },
+      },
+    });
+
+    it('should have correct elements', () => {
+      expect(vm.$el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(vm.$el.querySelector('button').getAttribute('disabled')).toBeTruthy();
+      expect(vm.$el.innerText).toContain('This merge request failed to be merged automatically.');
+      expect(vm.$el.innerText).toContain(mergeError);
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_checking_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_checking_spec.js
new file mode 100644
index 00000000000..3be11d47227
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_checking_spec.js
@@ -0,0 +1,19 @@
+import Vue from 'vue';
+import checkingComponent from '~/vue_merge_request_widget/components/states/mr_widget_checking';
+
+describe('MRWidgetChecking', () => {
+  describe('template', () => {
+    it('should have correct elements', () => {
+      const Component = Vue.extend(checkingComponent);
+      const el = new Component({
+        el: document.createElement('div'),
+      }).$el;
+
+      expect(el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(el.querySelector('button').classList.contains('btn-success')).toBeTruthy();
+      expect(el.querySelector('button').disabled).toBeTruthy();
+      expect(el.innerText).toContain('Checking ability to merge automatically.');
+      expect(el.querySelector('i')).toBeDefined();
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_closed_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_closed_spec.js
new file mode 100644
index 00000000000..78a70725e94
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_closed_spec.js
@@ -0,0 +1,51 @@
+import Vue from 'vue';
+import closedComponent from '~/vue_merge_request_widget/components/states/mr_widget_closed';
+
+const mr = {
+  targetBranch: 'good-branch',
+  targetBranchCommitsPath: '/good-branch',
+  closedBy: {
+    name: 'Fatih Acet',
+    username: 'fatihacet',
+  },
+  updatedAt: '2017-03-23T20:08:08.845Z',
+  closedAt: '1 day ago',
+};
+
+const createComponent = () => {
+  const Component = Vue.extend(closedComponent);
+
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { mr },
+  }).$el;
+};
+
+describe('MRWidgetClosed', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const mrProp = closedComponent.props.mr;
+
+      expect(mrProp.type instanceof Object).toBeTruthy();
+      expect(mrProp.required).toBeTruthy();
+    });
+  });
+
+  describe('components', () => {
+    it('should have components added', () => {
+      expect(closedComponent.components['mr-widget-author-and-time']).toBeDefined();
+    });
+  });
+
+  describe('template', () => {
+    it('should have correct elements', () => {
+      const el = createComponent();
+
+      expect(el.querySelector('h4').textContent).toContain('Closed by');
+      expect(el.querySelector('h4').textContent).toContain(mr.closedBy.name);
+      expect(el.textContent).toContain('The changes were not merged into');
+      expect(el.querySelector('.label-branch').getAttribute('href')).toEqual(mr.targetBranchCommitsPath);
+      expect(el.querySelector('.label-branch').textContent).toContain(mr.targetBranch);
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_conflicts_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_conflicts_spec.js
new file mode 100644
index 00000000000..e7ae85caec4
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_conflicts_spec.js
@@ -0,0 +1,69 @@
+import Vue from 'vue';
+import conflictsComponent from '~/vue_merge_request_widget/components/states/mr_widget_conflicts';
+
+const path = '/conflicts';
+const createComponent = () => {
+  const Component = Vue.extend(conflictsComponent);
+
+  return new Component({
+    el: document.createElement('div'),
+    propsData: {
+      mr: {
+        canMerge: true,
+        conflictResolutionPath: path,
+      },
+    },
+  });
+};
+
+describe('MRWidgetConflicts', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { mr } = conflictsComponent.props;
+
+      expect(mr.type instanceof Object).toBeTruthy();
+      expect(mr.required).toBeTruthy();
+    });
+  });
+
+  describe('template', () => {
+    it('should have correct elements', () => {
+      const el = createComponent().$el;
+      const resolveButton = el.querySelectorAll('.btn-group .btn')[0];
+      const mergeLocallyButton = el.querySelectorAll('.btn-group .btn')[1];
+
+      expect(el.textContent).toContain('There are merge conflicts.');
+      expect(el.textContent).not.toContain('ask someone with write access');
+      expect(el.querySelector('.btn-success').disabled).toBeTruthy();
+      expect(el.querySelectorAll('.btn-group .btn').length).toBe(2);
+      expect(resolveButton.textContent).toContain('Resolve conflicts');
+      expect(resolveButton.getAttribute('href')).toEqual(path);
+      expect(mergeLocallyButton.textContent).toContain('Merge locally');
+    });
+
+    describe('when user does not have permission to merge', () => {
+      let vm;
+
+      beforeEach(() => {
+        vm = createComponent();
+        vm.mr.canMerge = false;
+      });
+
+      it('should show proper message', (done) => {
+        Vue.nextTick(() => {
+          expect(vm.$el.textContent).toContain('ask someone with write access');
+          done();
+        });
+      });
+
+      it('should not have action buttons', (done) => {
+        Vue.nextTick(() => {
+          expect(vm.$el.querySelectorAll('.btn').length).toBe(1);
+          expect(vm.$el.querySelector('a.js-resolve-conflicts-button')).toEqual(null);
+          expect(vm.$el.querySelector('a.js-merge-locally-button')).toEqual(null);
+          done();
+        });
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_failed_to_merge_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_failed_to_merge_spec.js
new file mode 100644
index 00000000000..587b83430d9
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_failed_to_merge_spec.js
@@ -0,0 +1,122 @@
+import Vue from 'vue';
+import failedToMergeComponent from '~/vue_merge_request_widget/components/states/mr_widget_failed_to_merge';
+import eventHub from '~/vue_merge_request_widget/event_hub';
+
+const mr = {
+  mergeError: 'Merge error happened.',
+};
+const createComponent = () => {
+  const Component = Vue.extend(failedToMergeComponent);
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { mr },
+  });
+};
+
+describe('MRWidgetFailedToMerge', () => {
+  describe('data', () => {
+    it('should have default data', () => {
+      const data = failedToMergeComponent.data();
+
+      expect(data.timer).toEqual(10);
+      expect(data.isRefreshing).toBeFalsy();
+    });
+  });
+
+  describe('computed', () => {
+    describe('timerText', () => {
+      it('should return correct timer text', () => {
+        const vm = createComponent();
+        expect(vm.timerText).toEqual('10 seconds');
+
+        vm.timer = 1;
+        expect(vm.timerText).toEqual('a second');
+      });
+    });
+  });
+
+  describe('created', () => {
+    it('should disable polling', () => {
+      spyOn(eventHub, '$emit');
+      createComponent();
+
+      expect(eventHub.$emit).toHaveBeenCalledWith('DisablePolling');
+    });
+  });
+
+  describe('methods', () => {
+    describe('refresh', () => {
+      it('should emit event to request component refresh', () => {
+        spyOn(eventHub, '$emit');
+        const vm = createComponent();
+
+        expect(vm.isRefreshing).toBeFalsy();
+
+        vm.refresh();
+        expect(vm.isRefreshing).toBeTruthy();
+        expect(eventHub.$emit).toHaveBeenCalledWith('MRWidgetUpdateRequested');
+        expect(eventHub.$emit).toHaveBeenCalledWith('EnablePolling');
+      });
+    });
+
+    describe('updateTimer', () => {
+      it('should update timer and emit event when timer end', () => {
+        const vm = createComponent();
+        spyOn(vm, 'refresh');
+
+        expect(vm.timer).toEqual(10);
+
+        for (let i = 0; i < 10; i++) { // eslint-disable-line
+          expect(vm.timer).toEqual(10 - i);
+          vm.updateTimer();
+        }
+
+        expect(vm.refresh).toHaveBeenCalled();
+      });
+    });
+  });
+
+  describe('template', () => {
+    let vm;
+    let el;
+
+    beforeEach(() => {
+      vm = createComponent();
+      el = vm.$el;
+    });
+
+    it('should have correct elements', (done) => {
+      expect(el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(el.innerText).toContain('Merge error happened.');
+      expect(el.innerText).toContain('Refreshing in 10 seconds');
+      expect(el.innerText).not.toContain('Merge failed.');
+      expect(el.querySelector('button').getAttribute('disabled')).toBeTruthy();
+      expect(el.querySelector('button').innerText).toContain('Merge');
+      expect(el.querySelector('.js-refresh-button').innerText).toContain('Refresh now');
+      expect(el.querySelector('.js-refresh-label')).toEqual(null);
+      expect(el.innerText).not.toContain('Refreshing now...');
+      setTimeout(() => {
+        expect(el.innerText).toContain('Refreshing in 9 seconds');
+        done();
+      }, 1010);
+    });
+
+    it('should just generic merge failed message if merge_error is not available', (done) => {
+      vm.mr.mergeError = null;
+
+      Vue.nextTick(() => {
+        expect(el.innerText).toContain('Merge failed.');
+        expect(el.innerText).not.toContain('Merge error happened.');
+        done();
+      });
+    });
+
+    it('should show refresh label when refresh requested', () => {
+      vm.refresh();
+      Vue.nextTick(() => {
+        expect(el.innerText).not.toContain('Merge failed. Refreshing');
+        expect(el.innerText).toContain('Refreshing now...');
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_locked_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_locked_spec.js
new file mode 100644
index 00000000000..fb2ef606604
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_locked_spec.js
@@ -0,0 +1,33 @@
+import Vue from 'vue';
+import lockedComponent from '~/vue_merge_request_widget/components/states/mr_widget_locked';
+
+describe('MRWidgetLocked', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { mr } = lockedComponent.props;
+
+      expect(mr.type instanceof Object).toBeTruthy();
+      expect(mr.required).toBeTruthy();
+    });
+  });
+
+  describe('template', () => {
+    it('should have correct elements', () => {
+      const Component = Vue.extend(lockedComponent);
+      const mr = {
+        targetBranchPath: '/branch-path',
+        targetBranch: 'branch',
+      };
+      const el = new Component({
+        el: document.createElement('div'),
+        propsData: { mr },
+      }).$el;
+
+      expect(el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(el.innerText).toContain('it is locked');
+      expect(el.innerText).toContain('changes will be merged into');
+      expect(el.querySelector('.label-branch a').getAttribute('href')).toEqual(mr.targetBranchPath);
+      expect(el.querySelector('.label-branch a').textContent).toContain(mr.targetBranch);
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_merge_when_pipeline_succeeds_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_merge_when_pipeline_succeeds_spec.js
new file mode 100644
index 00000000000..8d8b90cea16
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_merge_when_pipeline_succeeds_spec.js
@@ -0,0 +1,213 @@
+import Vue from 'vue';
+import mwpsComponent from '~/vue_merge_request_widget/components/states/mr_widget_merge_when_pipeline_succeeds';
+import eventHub from '~/vue_merge_request_widget/event_hub';
+
+const targetBranchPath = '/foo/bar';
+const targetBranch = 'foo';
+const sha = '1EA2EZ34';
+
+const createComponent = () => {
+  const Component = Vue.extend(mwpsComponent);
+  const mr = {
+    shouldRemoveSourceBranch: false,
+    canRemoveSourceBranch: true,
+    canCancelAutomaticMerge: true,
+    mergeUserId: 1,
+    currentUserId: 1,
+    setToMWPSBy: {},
+    sha,
+    targetBranchPath,
+    targetBranch,
+  };
+
+  const service = {
+    cancelAutomaticMerge() {},
+    mergeResource: {
+      save() {},
+    },
+  };
+
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { mr, service },
+  });
+};
+
+describe('MRWidgetMergeWhenPipelineSucceeds', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { mr, service } = mwpsComponent.props;
+
+      expect(mr.type instanceof Object).toBeTruthy();
+      expect(mr.required).toBeTruthy();
+
+      expect(service.type instanceof Object).toBeTruthy();
+      expect(service.required).toBeTruthy();
+    });
+  });
+
+  describe('components', () => {
+    it('should have components added', () => {
+      expect(mwpsComponent.components['mr-widget-author']).toBeDefined();
+    });
+  });
+
+  describe('data', () => {
+    it('should have default data', () => {
+      const data = mwpsComponent.data();
+
+      expect(data.isCancellingAutoMerge).toBeFalsy();
+      expect(data.isRemovingSourceBranch).toBeFalsy();
+    });
+  });
+
+  describe('computed', () => {
+    describe('canRemoveSourceBranch', () => {
+      it('should return true when user is able to remove source branch', () => {
+        const vm = createComponent();
+
+        expect(vm.canRemoveSourceBranch).toBeTruthy();
+      });
+
+      it('should return false when user id is not the same with who set the MWPS', () => {
+        const vm = createComponent();
+
+        vm.mr.mergeUserId = 2;
+        expect(vm.canRemoveSourceBranch).toBeFalsy();
+
+        vm.mr.currentUserId = 2;
+        expect(vm.canRemoveSourceBranch).toBeTruthy();
+
+        vm.mr.currentUserId = 3;
+        expect(vm.canRemoveSourceBranch).toBeFalsy();
+      });
+
+      it('should return false when shouldRemoveSourceBranch set to false', () => {
+        const vm = createComponent();
+
+        vm.mr.shouldRemoveSourceBranch = true;
+        expect(vm.canRemoveSourceBranch).toBeFalsy();
+      });
+
+      it('should return false if user is not able to remove the source branch', () => {
+        const vm = createComponent();
+
+        vm.mr.canRemoveSourceBranch = false;
+        expect(vm.canRemoveSourceBranch).toBeFalsy();
+      });
+    });
+  });
+
+  describe('methods', () => {
+    describe('cancelAutomaticMerge', () => {
+      it('should set flag and call service then tell main component to update the widget with data', (done) => {
+        const vm = createComponent();
+        const mrObj = {
+          is_new_mr_data: true,
+        };
+        spyOn(eventHub, '$emit');
+        spyOn(vm.service, 'cancelAutomaticMerge').and.returnValue(new Promise((resolve) => {
+          resolve({
+            json() {
+              return mrObj;
+            },
+          });
+        }));
+
+        vm.cancelAutomaticMerge();
+        setTimeout(() => {
+          expect(vm.isCancellingAutoMerge).toBeTruthy();
+          expect(eventHub.$emit).toHaveBeenCalledWith('UpdateWidgetData', mrObj);
+          done();
+        }, 333);
+      });
+    });
+
+    describe('removeSourceBranch', () => {
+      it('should set flag and call service then request main component to update the widget', (done) => {
+        const vm = createComponent();
+        spyOn(eventHub, '$emit');
+        spyOn(vm.service.mergeResource, 'save').and.returnValue(new Promise((resolve) => {
+          resolve({
+            json() {
+              return {
+                status: 'merge_when_pipeline_succeeds',
+              };
+            },
+          });
+        }));
+
+        vm.removeSourceBranch();
+        setTimeout(() => {
+          expect(eventHub.$emit).toHaveBeenCalledWith('MRWidgetUpdateRequested');
+          expect(vm.service.mergeResource.save).toHaveBeenCalledWith({
+            sha,
+            merge_when_pipeline_succeeds: true,
+            should_remove_source_branch: true,
+          });
+          done();
+        }, 333);
+      });
+    });
+  });
+
+  describe('template', () => {
+    let vm;
+    let el;
+
+    beforeEach(() => {
+      vm = createComponent();
+      el = vm.$el;
+    });
+
+    it('should have correct elements', () => {
+      expect(el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(el.innerText).toContain('to be merged automatically when the pipeline succeeds.');
+      expect(el.innerText).toContain('The changes will be merged into');
+      expect(el.innerText).toContain(targetBranch);
+      expect(el.innerText).toContain('The source branch will not be removed.');
+      expect(el.querySelector('.js-cancel-auto-merge').innerText).toContain('Cancel automatic merge');
+      expect(el.querySelector('.js-cancel-auto-merge').getAttribute('disabled')).toBeFalsy();
+      expect(el.querySelector('.js-remove-source-branch').innerText).toContain('Remove source branch');
+      expect(el.querySelector('.js-remove-source-branch').getAttribute('disabled')).toBeFalsy();
+    });
+
+    it('should disable cancel auto merge button when the action is in progress', (done) => {
+      vm.isCancellingAutoMerge = true;
+
+      Vue.nextTick(() => {
+        expect(el.querySelector('.js-cancel-auto-merge').getAttribute('disabled')).toBeTruthy();
+        done();
+      });
+    });
+
+    it('should show source branch will be removed text when it source branch set to remove', (done) => {
+      vm.mr.shouldRemoveSourceBranch = true;
+
+      Vue.nextTick(() => {
+        const normalizedText = el.innerText.replace(/\s+/g, ' ');
+        expect(normalizedText).toContain('The source branch will be removed.');
+        expect(normalizedText).not.toContain('The source branch will not be removed.');
+        done();
+      });
+    });
+
+    it('should not show remove source branch button when user not able to remove source branch', (done) => {
+      vm.mr.currentUserId = 4;
+
+      Vue.nextTick(() => {
+        expect(el.querySelector('.js-remove-source-branch')).toEqual(null);
+        done();
+      });
+    });
+
+    it('should disable remove source branch button when the action is in progress', (done) => {
+      vm.isRemovingSourceBranch = true;
+
+      Vue.nextTick(() => {
+        expect(el.querySelector('.js-remove-source-branch').getAttribute('disabled')).toBeTruthy();
+        done();
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_merged_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_merged_spec.js
new file mode 100644
index 00000000000..6628010112d
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_merged_spec.js
@@ -0,0 +1,174 @@
+import Vue from 'vue';
+import mergedComponent from '~/vue_merge_request_widget/components/states/mr_widget_merged';
+import eventHub from '~/vue_merge_request_widget/event_hub';
+
+const targetBranch = 'foo';
+
+const createComponent = () => {
+  const Component = Vue.extend(mergedComponent);
+  const mr = {
+    isRemovingSourceBranch: false,
+    cherryPickInForkPath: false,
+    canCherryPickInCurrentMR: true,
+    revertInForkPath: false,
+    canRevertInCurrentMR: true,
+    canRemoveSourceBranch: true,
+    sourceBranchRemoved: true,
+    mergedBy: {},
+    mergedAt: '',
+    updatedAt: '',
+    targetBranch,
+  };
+
+  const service = {
+    removeSourceBranch() {},
+  };
+
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { mr, service },
+  });
+};
+
+describe('MRWidgetMerged', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { mr, service } = mergedComponent.props;
+
+      expect(mr.type instanceof Object).toBeTruthy();
+      expect(mr.required).toBeTruthy();
+
+      expect(service.type instanceof Object).toBeTruthy();
+      expect(service.required).toBeTruthy();
+    });
+  });
+
+  describe('components', () => {
+    it('should have components added', () => {
+      expect(mergedComponent.components['mr-widget-author-and-time']).toBeDefined();
+    });
+  });
+
+  describe('data', () => {
+    it('should have default data', () => {
+      const data = mergedComponent.data();
+
+      expect(data.isMakingRequest).toBeFalsy();
+    });
+  });
+
+  describe('computed', () => {
+    describe('shouldShowRemoveSourceBranch', () => {
+      it('should correct value when fields changed', () => {
+        const vm = createComponent();
+        vm.mr.sourceBranchRemoved = false;
+        expect(vm.shouldShowRemoveSourceBranch).toBeTruthy();
+
+        vm.mr.sourceBranchRemoved = true;
+        expect(vm.shouldShowRemoveSourceBranch).toBeFalsy();
+
+        vm.mr.sourceBranchRemoved = false;
+        vm.mr.canRemoveSourceBranch = false;
+        expect(vm.shouldShowRemoveSourceBranch).toBeFalsy();
+
+        vm.mr.canRemoveSourceBranch = true;
+        vm.isMakingRequest = true;
+        expect(vm.shouldShowRemoveSourceBranch).toBeFalsy();
+
+        vm.mr.isRemovingSourceBranch = true;
+        vm.mr.canRemoveSourceBranch = true;
+        vm.isMakingRequest = true;
+        expect(vm.shouldShowRemoveSourceBranch).toBeFalsy();
+      });
+    });
+    describe('shouldShowSourceBranchRemoving', () => {
+      it('should correct value when fields changed', () => {
+        const vm = createComponent();
+        vm.mr.sourceBranchRemoved = false;
+        expect(vm.shouldShowSourceBranchRemoving).toBeFalsy();
+
+        vm.mr.sourceBranchRemoved = true;
+        expect(vm.shouldShowRemoveSourceBranch).toBeFalsy();
+
+        vm.mr.sourceBranchRemoved = false;
+        vm.isMakingRequest = true;
+        expect(vm.shouldShowSourceBranchRemoving).toBeTruthy();
+
+        vm.isMakingRequest = false;
+        vm.mr.isRemovingSourceBranch = true;
+        expect(vm.shouldShowSourceBranchRemoving).toBeTruthy();
+      });
+    });
+  });
+
+  describe('methods', () => {
+    describe('removeSourceBranch', () => {
+      it('should set flag and call service then request main component to update the widget', (done) => {
+        const vm = createComponent();
+        spyOn(eventHub, '$emit');
+        spyOn(vm.service, 'removeSourceBranch').and.returnValue(new Promise((resolve) => {
+          resolve({
+            json() {
+              return {
+                message: 'Branch was removed',
+              };
+            },
+          });
+        }));
+
+        vm.removeSourceBranch();
+        setTimeout(() => {
+          const args = eventHub.$emit.calls.argsFor(0);
+          expect(vm.isMakingRequest).toBeTruthy();
+          expect(args[0]).toEqual('MRWidgetUpdateRequested');
+          expect(args[1]).not.toThrow();
+          done();
+        }, 333);
+      });
+    });
+  });
+
+  describe('template', () => {
+    let vm;
+    let el;
+
+    beforeEach(() => {
+      vm = createComponent();
+      el = vm.$el;
+    });
+
+    it('should have correct elements', () => {
+      expect(el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(el.querySelector('.js-mr-widget-author')).toBeDefined();
+      expect(el.innerText).toContain('The changes were merged into');
+      expect(el.innerText).toContain(targetBranch);
+      expect(el.innerText).toContain('The source branch has been removed.');
+      expect(el.innerText).toContain('Revert');
+      expect(el.innerText).toContain('Cherry-pick');
+      expect(el.innerText).not.toContain('You can remove source branch now.');
+      expect(el.innerText).not.toContain('The source branch is being removed.');
+    });
+
+    it('should not show source branch removed text', (done) => {
+      vm.mr.sourceBranchRemoved = false;
+
+      Vue.nextTick(() => {
+        expect(el.innerText).toContain('You can remove source branch now.');
+        expect(el.innerText).not.toContain('The source branch has been removed.');
+        done();
+      });
+    });
+
+    it('should show source branch removing text', (done) => {
+      vm.mr.isRemovingSourceBranch = true;
+      vm.mr.sourceBranchRemoved = false;
+
+      Vue.nextTick(() => {
+        expect(el.innerText).toContain('The source branch is being removed.');
+        expect(el.innerText).not.toContain('You can remove source branch now.');
+        expect(el.innerText).not.toContain('The source branch has been removed.');
+        done();
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_missing_branch_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_missing_branch_spec.js
new file mode 100644
index 00000000000..98674d12afb
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_missing_branch_spec.js
@@ -0,0 +1,55 @@
+import Vue from 'vue';
+import missingBranchComponent from '~/vue_merge_request_widget/components/states/mr_widget_missing_branch';
+
+const createComponent = () => {
+  const Component = Vue.extend(missingBranchComponent);
+  const mr = {
+    sourceBranchRemoved: true,
+  };
+
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { mr },
+  });
+};
+
+describe('MRWidgetMissingBranch', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const mrProp = missingBranchComponent.props.mr;
+
+      expect(mrProp.type instanceof Object).toBeTruthy();
+      expect(mrProp.required).toBeTruthy();
+    });
+  });
+
+  describe('components', () => {
+    it('should have components added', () => {
+      expect(missingBranchComponent.components['mr-widget-merge-help']).toBeDefined();
+    });
+  });
+
+  describe('computed', () => {
+    describe('missingBranchName', () => {
+      it('should return proper branch name', () => {
+        const vm = createComponent();
+        expect(vm.missingBranchName).toEqual('source');
+
+        vm.mr.sourceBranchRemoved = false;
+        expect(vm.missingBranchName).toEqual('target');
+      });
+    });
+  });
+
+  describe('template', () => {
+    it('should have correct elements', () => {
+      const el = createComponent().$el;
+      const content = el.textContent.replace(/\n(\s)+/g, ' ').trim();
+
+      expect(el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(el.querySelector('button').getAttribute('disabled')).toBeTruthy();
+      expect(content).toContain('source branch does not exist.');
+      expect(content).toContain('Please restore the source branch or use a different source branch.');
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_not_allowed_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_not_allowed_spec.js
new file mode 100644
index 00000000000..61e00f4cf79
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_not_allowed_spec.js
@@ -0,0 +1,17 @@
+import Vue from 'vue';
+import notAllowedComponent from '~/vue_merge_request_widget/components/states/mr_widget_not_allowed';
+
+describe('MRWidgetNotAllowed', () => {
+  describe('template', () => {
+    const Component = Vue.extend(notAllowedComponent);
+    const vm = new Component({
+      el: document.createElement('div'),
+    });
+    it('should have correct elements', () => {
+      expect(vm.$el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(vm.$el.querySelector('button').getAttribute('disabled')).toBeTruthy();
+      expect(vm.$el.innerText).toContain('Ready to be merged automatically.');
+      expect(vm.$el.innerText).toContain('Ask someone with write access to this repository to merge this request.');
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_nothing_to_merge_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_nothing_to_merge_spec.js
new file mode 100644
index 00000000000..d40c67b189d
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_nothing_to_merge_spec.js
@@ -0,0 +1,17 @@
+import Vue from 'vue';
+import nothingToMergeComponent from '~/vue_merge_request_widget/components/states/mr_widget_nothing_to_merge';
+
+describe('MRWidgetNothingToMerge', () => {
+  describe('template', () => {
+    const Component = Vue.extend(nothingToMergeComponent);
+    const vm = new Component({
+      el: document.createElement('div'),
+    });
+    it('should have correct elements', () => {
+      expect(vm.$el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(vm.$el.querySelector('button').getAttribute('disabled')).toBeTruthy();
+      expect(vm.$el.innerText).toContain('There is nothing to merge from source branch into target branch.');
+      expect(vm.$el.innerText).toContain('Please push new commits or use a different branch.');
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_pipeline_blocked_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_pipeline_blocked_spec.js
new file mode 100644
index 00000000000..b293d118571
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_pipeline_blocked_spec.js
@@ -0,0 +1,16 @@
+import Vue from 'vue';
+import pipelineBlockedComponent from '~/vue_merge_request_widget/components/states/mr_widget_pipeline_blocked';
+
+describe('MRWidgetPipelineBlocked', () => {
+  describe('template', () => {
+    const Component = Vue.extend(pipelineBlockedComponent);
+    const vm = new Component({
+      el: document.createElement('div'),
+    });
+    it('should have correct elements', () => {
+      expect(vm.$el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(vm.$el.querySelector('button').getAttribute('disabled')).toBeTruthy();
+      expect(vm.$el.innerText).toContain('Pipeline blocked. The pipeline for this merge request requires a manual action to proceed.');
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_pipeline_failed_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_pipeline_failed_spec.js
new file mode 100644
index 00000000000..807fba705d4
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_pipeline_failed_spec.js
@@ -0,0 +1,16 @@
+import Vue from 'vue';
+import pipelineFailedComponent from '~/vue_merge_request_widget/components/states/mr_widget_pipeline_failed';
+
+describe('MRWidgetPipelineFailed', () => {
+  describe('template', () => {
+    const Component = Vue.extend(pipelineFailedComponent);
+    const vm = new Component({
+      el: document.createElement('div'),
+    });
+    it('should have correct elements', () => {
+      expect(vm.$el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(vm.$el.querySelector('button').getAttribute('disabled')).toBeTruthy();
+      expect(vm.$el.innerText).toContain('The pipeline for this merge request failed. Please retry the job or push a new commit to fix the failure.');
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_ready_to_merge_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_ready_to_merge_spec.js
new file mode 100644
index 00000000000..74df99415c9
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_ready_to_merge_spec.js
@@ -0,0 +1,389 @@
+import Vue from 'vue';
+import readyToMergeComponent from '~/vue_merge_request_widget/components/states/mr_widget_ready_to_merge';
+import eventHub from '~/vue_merge_request_widget/event_hub';
+import * as simplePoll from '~/lib/utils/simple_poll';
+
+const commitMessage = 'This is the commit message';
+const commitMessageWithDescription = 'This is the commit message description';
+const createComponent = () => {
+  const Component = Vue.extend(readyToMergeComponent);
+  const mr = {
+    isPipelineActive: false,
+    pipeline: null,
+    isPipelineFailed: false,
+    onlyAllowMergeIfPipelineSucceeds: false,
+    hasCI: false,
+    ciStatus: null,
+    sha: '12345678',
+    commitMessage,
+    commitMessageWithDescription,
+  };
+
+  const service = {
+    merge() {},
+    poll() {},
+  };
+
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { mr, service },
+  });
+};
+
+describe('MRWidgetReadyToMerge', () => {
+  let vm;
+
+  beforeEach(() => {
+    vm = createComponent();
+  });
+
+  describe('props', () => {
+    it('should have props', () => {
+      const { mr, service } = readyToMergeComponent.props;
+
+      expect(mr.type instanceof Object).toBeTruthy();
+      expect(mr.required).toBeTruthy();
+
+      expect(service.type instanceof Object).toBeTruthy();
+      expect(service.required).toBeTruthy();
+    });
+  });
+
+  describe('data', () => {
+    it('should have default data', () => {
+      expect(vm.removeSourceBranch).toBeTruthy(true);
+      expect(vm.mergeWhenBuildSucceeds).toBeFalsy();
+      expect(vm.useCommitMessageWithDescription).toBeFalsy();
+      expect(vm.setToMergeWhenPipelineSucceeds).toBeFalsy();
+      expect(vm.showCommitMessageEditor).toBeFalsy();
+      expect(vm.isMakingRequest).toBeFalsy();
+      expect(vm.isMergingImmediately).toBeFalsy();
+      expect(vm.commitMessage).toBe(vm.mr.commitMessage);
+      expect(vm.successSvg).toBeDefined();
+      expect(vm.warningSvg).toBeDefined();
+    });
+  });
+
+  describe('computed', () => {
+    describe('commitMessageLinkTitle', () => {
+      const withDesc = 'Include description in commit message';
+      const withoutDesc = "Don't include description in commit message";
+
+      it('should return message wit description', () => {
+        expect(vm.commitMessageLinkTitle).toEqual(withDesc);
+      });
+
+      it('should return message without description', () => {
+        vm.useCommitMessageWithDescription = true;
+        expect(vm.commitMessageLinkTitle).toEqual(withoutDesc);
+      });
+    });
+
+    describe('mergeButtonClass', () => {
+      const defaultClass = 'btn btn-success accept-merge-request';
+      const failedClass = `${defaultClass} btn-danger`;
+      const inActionClass = `${defaultClass} btn-info`;
+
+      it('should return default class', () => {
+        vm.mr.pipeline = true;
+        expect(vm.mergeButtonClass).toEqual(defaultClass);
+      });
+
+      it('should return failed class when MR has CI but also has an unknown status', () => {
+        vm.mr.hasCI = true;
+        expect(vm.mergeButtonClass).toEqual(failedClass);
+      });
+
+      it('should return default class when MR has no pipeline', () => {
+        expect(vm.mergeButtonClass).toEqual(defaultClass);
+      });
+
+      it('should return in action class when pipeline is active', () => {
+        vm.mr.pipeline = {};
+        vm.mr.isPipelineActive = true;
+        expect(vm.mergeButtonClass).toEqual(inActionClass);
+      });
+
+      it('should return failed class when pipeline is failed', () => {
+        vm.mr.pipeline = {};
+        vm.mr.isPipelineFailed = true;
+        expect(vm.mergeButtonClass).toEqual(failedClass);
+      });
+    });
+
+    describe('mergeButtonText', () => {
+      it('should return Merge', () => {
+        expect(vm.mergeButtonText).toEqual('Merge');
+      });
+
+      it('should return Merge in progress', () => {
+        vm.isMergingImmediately = true;
+        expect(vm.mergeButtonText).toEqual('Merge in progress');
+      });
+
+      it('should return Merge when pipeline succeeds', () => {
+        vm.isMergingImmediately = false;
+        vm.mr.isPipelineActive = true;
+        expect(vm.mergeButtonText).toEqual('Merge when pipeline succeeds');
+      });
+    });
+
+    describe('shouldShowMergeOptionsDropdown', () => {
+      it('should return false with initial data', () => {
+        expect(vm.shouldShowMergeOptionsDropdown).toBeFalsy();
+      });
+
+      it('should return true when pipeline active', () => {
+        vm.mr.isPipelineActive = true;
+        expect(vm.shouldShowMergeOptionsDropdown).toBeTruthy();
+      });
+
+      it('should return false when pipeline active but only merge when pipeline succeeds set in project options', () => {
+        vm.mr.isPipelineActive = true;
+        vm.mr.onlyAllowMergeIfPipelineSucceeds = true;
+        expect(vm.shouldShowMergeOptionsDropdown).toBeFalsy();
+      });
+    });
+
+    describe('isMergeButtonDisabled', () => {
+      it('should return false with initial data', () => {
+        expect(vm.isMergeButtonDisabled).toBeFalsy();
+      });
+
+      it('should return true when there is no commit message', () => {
+        vm.commitMessage = '';
+        expect(vm.isMergeButtonDisabled).toBeTruthy();
+      });
+
+      it('should return true if merge is not allowed', () => {
+        vm.mr.onlyAllowMergeIfPipelineSucceeds = true;
+        vm.mr.isPipelineFailed = true;
+        expect(vm.isMergeButtonDisabled).toBeTruthy();
+      });
+
+      it('should return true when there vm instance is making request', () => {
+        vm.isMakingRequest = true;
+        expect(vm.isMergeButtonDisabled).toBeTruthy();
+      });
+    });
+  });
+
+  describe('methods', () => {
+    describe('isMergeAllowed', () => {
+      it('should return false with initial data', () => {
+        expect(vm.isMergeAllowed()).toBeTruthy();
+      });
+
+      it('should return false when MR is set only merge when pipeline succeeds', () => {
+        vm.mr.onlyAllowMergeIfPipelineSucceeds = true;
+        expect(vm.isMergeAllowed()).toBeTruthy();
+      });
+
+      it('should return true true', () => {
+        vm.mr.onlyAllowMergeIfPipelineSucceeds = true;
+        vm.mr.isPipelineFailed = true;
+        expect(vm.isMergeAllowed()).toBeFalsy();
+      });
+    });
+
+    describe('updateCommitMessage', () => {
+      it('should revert flag and change commitMessage', () => {
+        expect(vm.useCommitMessageWithDescription).toBeFalsy();
+        expect(vm.commitMessage).toEqual(commitMessage);
+        vm.updateCommitMessage();
+        expect(vm.useCommitMessageWithDescription).toBeTruthy();
+        expect(vm.commitMessage).toEqual(commitMessageWithDescription);
+        vm.updateCommitMessage();
+        expect(vm.useCommitMessageWithDescription).toBeFalsy();
+        expect(vm.commitMessage).toEqual(commitMessage);
+      });
+    });
+
+    describe('toggleCommitMessageEditor', () => {
+      it('should toggle showCommitMessageEditor flag', () => {
+        expect(vm.showCommitMessageEditor).toBeFalsy();
+        vm.toggleCommitMessageEditor();
+        expect(vm.showCommitMessageEditor).toBeTruthy();
+      });
+    });
+
+    describe('handleMergeButtonClick', () => {
+      const returnPromise = status => new Promise((resolve) => {
+        resolve({
+          json() {
+            return { status };
+          },
+        });
+      });
+
+      it('should handle merge when pipeline succeeds', (done) => {
+        spyOn(eventHub, '$emit');
+        spyOn(vm.service, 'merge').and.returnValue(returnPromise('merge_when_pipeline_succeeds'));
+        vm.removeSourceBranch = false;
+        vm.handleMergeButtonClick(true);
+
+        setTimeout(() => {
+          expect(vm.setToMergeWhenPipelineSucceeds).toBeTruthy();
+          expect(vm.isMakingRequest).toBeTruthy();
+          expect(eventHub.$emit).toHaveBeenCalledWith('MRWidgetUpdateRequested');
+
+          const params = vm.service.merge.calls.argsFor(0)[0];
+          expect(params.sha).toEqual(vm.mr.sha);
+          expect(params.commit_message).toEqual(vm.mr.commitMessage);
+          expect(params.should_remove_source_branch).toBeFalsy();
+          expect(params.merge_when_pipeline_succeeds).toBeTruthy();
+          done();
+        }, 333);
+      });
+
+      it('should handle merge failed', (done) => {
+        spyOn(eventHub, '$emit');
+        spyOn(vm.service, 'merge').and.returnValue(returnPromise('failed'));
+        vm.handleMergeButtonClick(false, true);
+
+        setTimeout(() => {
+          expect(vm.setToMergeWhenPipelineSucceeds).toBeFalsy();
+          expect(vm.isMakingRequest).toBeTruthy();
+          expect(eventHub.$emit).toHaveBeenCalledWith('FailedToMerge', undefined);
+
+          const params = vm.service.merge.calls.argsFor(0)[0];
+          expect(params.should_remove_source_branch).toBeTruthy();
+          expect(params.merge_when_pipeline_succeeds).toBeFalsy();
+          done();
+        }, 333);
+      });
+
+      it('should handle merge action accepted case', (done) => {
+        spyOn(vm.service, 'merge').and.returnValue(returnPromise('success'));
+        spyOn(vm, 'initiateMergePolling');
+        vm.handleMergeButtonClick();
+
+        setTimeout(() => {
+          expect(vm.setToMergeWhenPipelineSucceeds).toBeFalsy();
+          expect(vm.isMakingRequest).toBeTruthy();
+          expect(vm.initiateMergePolling).toHaveBeenCalled();
+
+          const params = vm.service.merge.calls.argsFor(0)[0];
+          expect(params.should_remove_source_branch).toBeTruthy();
+          expect(params.merge_when_pipeline_succeeds).toBeFalsy();
+          done();
+        }, 333);
+      });
+    });
+
+    describe('initiateMergePolling', () => {
+      it('should call simplePoll', () => {
+        spyOn(simplePoll, 'default');
+        vm.initiateMergePolling();
+        expect(simplePoll.default).toHaveBeenCalled();
+      });
+    });
+
+    describe('handleMergePolling', () => {
+      const returnPromise = state => new Promise((resolve) => {
+        resolve({
+          json() {
+            return { state, source_branch_exists: true };
+          },
+        });
+      });
+
+      it('should call start and stop polling when MR merged', (done) => {
+        spyOn(eventHub, '$emit');
+        spyOn(vm.service, 'poll').and.returnValue(returnPromise('merged'));
+        spyOn(vm, 'initiateRemoveSourceBranchPolling');
+
+        let cpc = false; // continuePollingCalled
+        let spc = false; // stopPollingCalled
+
+        vm.handleMergePolling(() => { cpc = true; }, () => { spc = true; });
+        setTimeout(() => {
+          expect(vm.service.poll).toHaveBeenCalled();
+          expect(eventHub.$emit).toHaveBeenCalledWith('MRWidgetUpdateRequested');
+          expect(eventHub.$emit).toHaveBeenCalledWith('FetchActionsContent');
+          expect(vm.initiateRemoveSourceBranchPolling).toHaveBeenCalled();
+          expect(cpc).toBeFalsy();
+          expect(spc).toBeTruthy();
+
+          done();
+        }, 333);
+      });
+
+      it('should continue polling until MR is merged', (done) => {
+        spyOn(vm.service, 'poll').and.returnValue(returnPromise('some_other_state'));
+        spyOn(vm, 'initiateRemoveSourceBranchPolling');
+
+        let cpc = false; // continuePollingCalled
+        let spc = false; // stopPollingCalled
+
+        vm.handleMergePolling(() => { cpc = true; }, () => { spc = true; });
+        setTimeout(() => {
+          expect(cpc).toBeTruthy();
+          expect(spc).toBeFalsy();
+
+          done();
+        }, 333);
+      });
+    });
+
+    describe('initiateRemoveSourceBranchPolling', () => {
+      it('should emit event and call simplePoll', () => {
+        spyOn(eventHub, '$emit');
+        spyOn(simplePoll, 'default');
+
+        vm.initiateRemoveSourceBranchPolling();
+        expect(eventHub.$emit).toHaveBeenCalledWith('SetBranchRemoveFlag', [true]);
+        expect(simplePoll.default).toHaveBeenCalled();
+      });
+    });
+
+    describe('handleRemoveBranchPolling', () => {
+      const returnPromise = state => new Promise((resolve) => {
+        resolve({
+          json() {
+            return { source_branch_exists: state };
+          },
+        });
+      });
+
+      it('should call start and stop polling when MR merged', (done) => {
+        spyOn(eventHub, '$emit');
+        spyOn(vm.service, 'poll').and.returnValue(returnPromise(false));
+
+        let cpc = false; // continuePollingCalled
+        let spc = false; // stopPollingCalled
+
+        vm.handleRemoveBranchPolling(() => { cpc = true; }, () => { spc = true; });
+        setTimeout(() => {
+          expect(vm.service.poll).toHaveBeenCalled();
+
+          const args = eventHub.$emit.calls.argsFor(0);
+          expect(args[0]).toEqual('MRWidgetUpdateRequested');
+          expect(args[1]).toBeDefined();
+          args[1]();
+          expect(eventHub.$emit).toHaveBeenCalledWith('SetBranchRemoveFlag', [false]);
+
+          expect(cpc).toBeFalsy();
+          expect(spc).toBeTruthy();
+
+          done();
+        }, 333);
+      });
+
+      it('should continue polling until MR is merged', (done) => {
+        spyOn(vm.service, 'poll').and.returnValue(returnPromise(true));
+
+        let cpc = false; // continuePollingCalled
+        let spc = false; // stopPollingCalled
+
+        vm.handleRemoveBranchPolling(() => { cpc = true; }, () => { spc = true; });
+        setTimeout(() => {
+          expect(cpc).toBeTruthy();
+          expect(spc).toBeFalsy();
+
+          done();
+        }, 333);
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_unresolved_discussions_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_unresolved_discussions_spec.js
new file mode 100644
index 00000000000..fe87f110354
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_unresolved_discussions_spec.js
@@ -0,0 +1,47 @@
+import Vue from 'vue';
+import unresolvedDiscussionsComponent from '~/vue_merge_request_widget/components/states/mr_widget_unresolved_discussions';
+
+describe('MRWidgetUnresolvedDiscussions', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { mr } = unresolvedDiscussionsComponent.props;
+
+      expect(mr.type instanceof Object).toBeTruthy();
+      expect(mr.required).toBeTruthy();
+    });
+  });
+
+  describe('template', () => {
+    let el;
+    let vm;
+    const path = 'foo/bar';
+
+    beforeEach(() => {
+      const Component = Vue.extend(unresolvedDiscussionsComponent);
+      const mr = {
+        createIssueToResolveDiscussionsPath: path,
+      };
+      vm = new Component({
+        el: document.createElement('div'),
+        propsData: { mr },
+      });
+      el = vm.$el;
+    });
+
+    it('should have correct elements', () => {
+      expect(el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(el.innerText).toContain('There are unresolved discussions. Please resolve these discussions');
+      expect(el.innerText).toContain('Create an issue to resolve them later');
+      expect(el.querySelector('.js-create-issue').getAttribute('href')).toEqual(path);
+    });
+
+    it('should not show create issue button if user cannot create issue', (done) => {
+      vm.mr.createIssueToResolveDiscussionsPath = '';
+
+      Vue.nextTick(() => {
+        expect(el.querySelector('.js-create-issue')).toEqual(null);
+        done();
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/components/states/mr_widget_wip_spec.js b/spec/javascripts/vue_mr_widget/components/states/mr_widget_wip_spec.js
new file mode 100644
index 00000000000..45bd1a69964
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/states/mr_widget_wip_spec.js
@@ -0,0 +1,96 @@
+import Vue from 'vue';
+import wipComponent from '~/vue_merge_request_widget/components/states/mr_widget_wip';
+import eventHub from '~/vue_merge_request_widget/event_hub';
+
+const createComponent = () => {
+  const Component = Vue.extend(wipComponent);
+  const mr = {
+    title: 'The best MR ever',
+    removeWIPPath: '/path/to/remove/wip',
+  };
+  const service = {
+    removeWIP() {},
+  };
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { mr, service },
+  });
+};
+
+describe('MRWidgetWIP', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { mr, service } = wipComponent.props;
+
+      expect(mr.type instanceof Object).toBeTruthy();
+      expect(mr.required).toBeTruthy();
+
+      expect(service.type instanceof Object).toBeTruthy();
+      expect(service.required).toBeTruthy();
+    });
+  });
+
+  describe('data', () => {
+    it('should have default data', () => {
+      const vm = createComponent();
+      expect(vm.isMakingRequest).toBeFalsy();
+    });
+  });
+
+  describe('methods', () => {
+    const mrObj = {
+      is_new_mr_data: true,
+    };
+
+    describe('removeWIP', () => {
+      it('should make a request to service and handle response', (done) => {
+        const vm = createComponent();
+
+        spyOn(window, 'Flash').and.returnValue(true);
+        spyOn(eventHub, '$emit');
+        spyOn(vm.service, 'removeWIP').and.returnValue(new Promise((resolve) => {
+          resolve({
+            json() {
+              return mrObj;
+            },
+          });
+        }));
+
+        vm.removeWIP();
+        setTimeout(() => {
+          expect(vm.isMakingRequest).toBeTruthy();
+          expect(eventHub.$emit).toHaveBeenCalledWith('UpdateWidgetData', mrObj);
+          expect(window.Flash).toHaveBeenCalledWith('The merge request can now be merged.', 'notice');
+          done();
+        }, 333);
+      });
+    });
+  });
+
+  describe('template', () => {
+    let vm;
+    let el;
+
+    beforeEach(() => {
+      vm = createComponent();
+      el = vm.$el;
+    });
+
+    it('should have correct elements', () => {
+      expect(el.classList.contains('mr-widget-body')).toBeTruthy();
+      expect(el.innerText).toContain('This merge request is currently Work In Progress and therefore unable to merge');
+      expect(el.querySelector('button').getAttribute('disabled')).toBeTruthy();
+      expect(el.querySelector('button').innerText).toContain('Merge');
+      expect(el.querySelector('.js-remove-wip').innerText).toContain('Resolve WIP status');
+    });
+
+    it('should not show removeWIP button is user cannot update MR', (done) => {
+      vm.mr.removeWIPPath = '';
+
+      Vue.nextTick(() => {
+        expect(el.querySelector('.js-remove-wip')).toEqual(null);
+        done();
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/mock_data.js b/spec/javascripts/vue_mr_widget/mock_data.js
new file mode 100644
index 00000000000..e6f96d5588b
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/mock_data.js
@@ -0,0 +1,214 @@
+/* eslint-disable */
+
+export default {
+  "id": 132,
+  "iid": 22,
+  "assignee_id": null,
+  "author_id": 1,
+  "description": "",
+  "lock_version": null,
+  "milestone_id": null,
+  "position": 0,
+  "state": "merged",
+  "title": "Update README.md",
+  "updated_by_id": null,
+  "created_at": "2017-04-07T12:27:26.718Z",
+  "updated_at": "2017-04-07T15:39:25.852Z",
+  "deleted_at": null,
+  "time_estimate": 0,
+  "total_time_spent": 0,
+  "human_time_estimate": null,
+  "human_total_time_spent": null,
+  "in_progress_merge_commit_sha": null,
+  "locked_at": null,
+  "merge_commit_sha": "53027d060246c8f47e4a9310fb332aa52f221775",
+  "merge_error": null,
+  "merge_params": {
+    "force_remove_source_branch": null
+  },
+  "merge_status": "can_be_merged",
+  "merge_user_id": null,
+  "merge_when_pipeline_succeeds": false,
+  "source_branch": "daaaa",
+  "source_project_id": 19,
+  "target_branch": "master",
+  "target_project_id": 19,
+  "merge_event": {
+    "author": {
+      "name": "Administrator",
+      "username": "root",
+      "id": 1,
+      "state": "active",
+      "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
+      "web_url": "http://localhost:3000/root"
+    },
+    "updated_at": "2017-04-07T15:39:25.696Z"
+  },
+  "closed_event": null,
+  "author": {
+    "name": "Administrator",
+    "username": "root",
+    "id": 1,
+    "state": "active",
+    "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
+    "web_url": "http://localhost:3000/root"
+  },
+  "merge_user": null,
+  "diff_head_sha": "104096c51715e12e7ae41f9333e9fa35b73f385d",
+  "diff_head_commit_short_id": "104096c5",
+  "merge_commit_message": "Merge branch 'daaaa' into 'master'\n\nUpdate README.md\n\nSee merge request !22",
+  "pipeline": {
+    "id": 172,
+    "user": {
+      "name": "Administrator",
+      "username": "root",
+      "id": 1,
+      "state": "active",
+      "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
+      "web_url": "http://localhost:3000/root"
+    },
+    "active": false,
+    "coverage": "92.16",
+    "path": "/root/acets-app/pipelines/172",
+    "details": {
+      "status": {
+        "icon": "icon_status_success",
+        "favicon": "favicon_status_success",
+        "text": "passed",
+        "label": "passed",
+        "group": "success",
+        "has_details": true,
+        "details_path": "/root/acets-app/pipelines/172"
+      },
+      "duration": null,
+      "finished_at": "2017-04-07T14:00:14.256Z",
+      "stages": [
+        {
+          "name": "build",
+          "title": "build: failed",
+          "status": {
+            "icon": "icon_status_failed",
+            "favicon": "favicon_status_failed",
+            "text": "failed",
+            "label": "failed",
+            "group": "failed",
+            "has_details": true,
+            "details_path": "/root/acets-app/pipelines/172#build"
+          },
+          "path": "/root/acets-app/pipelines/172#build",
+          "dropdown_path": "/root/acets-app/pipelines/172/stage.json?stage=build"
+        },
+        {
+          "name": "review",
+          "title": "review: skipped",
+          "status": {
+            "icon": "icon_status_skipped",
+            "favicon": "favicon_status_skipped",
+            "text": "skipped",
+            "label": "skipped",
+            "group": "skipped",
+            "has_details": true,
+            "details_path": "/root/acets-app/pipelines/172#review"
+          },
+          "path": "/root/acets-app/pipelines/172#review",
+          "dropdown_path": "/root/acets-app/pipelines/172/stage.json?stage=review"
+        }
+      ],
+      "artifacts": [
+
+      ],
+      "manual_actions": [
+        {
+          "name": "stop_review",
+          "path": "/root/acets-app/builds/1427/play",
+          "playable": false
+        }
+      ]
+    },
+    "flags": {
+      "latest": false,
+      "triggered": false,
+      "stuck": false,
+      "yaml_errors": false,
+      "retryable": true,
+      "cancelable": false
+    },
+    "ref": {
+      "name": "daaaa",
+      "path": "/root/acets-app/tree/daaaa",
+      "tag": false,
+      "branch": true
+    },
+    "commit": {
+      "id": "104096c51715e12e7ae41f9333e9fa35b73f385d",
+      "short_id": "104096c5",
+      "title": "Update README.md",
+      "created_at": "2017-04-07T15:27:18.000+03:00",
+      "parent_ids": [
+        "2396536178668d8930c29d904e53bd4d06228b32"
+      ],
+      "message": "Update README.md",
+      "author_name": "Administrator",
+      "author_email": "admin@example.com",
+      "authored_date": "2017-04-07T15:27:18.000+03:00",
+      "committer_name": "Administrator",
+      "committer_email": "admin@example.com",
+      "committed_date": "2017-04-07T15:27:18.000+03:00",
+      "author": {
+        "name": "Administrator",
+        "username": "root",
+        "id": 1,
+        "state": "active",
+        "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
+        "web_url": "http://localhost:3000/root"
+      },
+      "author_gravatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
+      "commit_url": "http://localhost:3000/root/acets-app/commit/104096c51715e12e7ae41f9333e9fa35b73f385d",
+      "commit_path": "/root/acets-app/commit/104096c51715e12e7ae41f9333e9fa35b73f385d"
+    },
+    "retry_path": "/root/acets-app/pipelines/172/retry",
+    "created_at": "2017-04-07T12:27:19.520Z",
+    "updated_at": "2017-04-07T15:28:44.800Z"
+  },
+  "work_in_progress": false,
+  "source_branch_exists": false,
+  "mergeable_discussions_state": true,
+  "conflicts_can_be_resolved_in_ui": false,
+  "branch_missing": true,
+  "commits_count": 1,
+  "has_conflicts": false,
+  "can_be_merged": true,
+  "has_ci": true,
+  "ci_status": "success",
+  "pipeline_status_path": "/root/acets-app/merge_requests/22/pipeline_status",
+  "issues_links": {
+    "closing": "",
+    "mentioned_but_not_closing": ""
+  },
+  "current_user": {
+    "can_resolve_conflicts": true,
+    "can_remove_source_branch": false,
+    "can_revert_on_current_merge_request": true,
+    "can_cherry_pick_on_current_merge_request": true
+  },
+  "target_branch_path": "/root/acets-app/branches/master",
+  "source_branch_path": "/root/acets-app/branches/daaaa",
+  "conflict_resolution_ui_path": "/root/acets-app/merge_requests/22/conflicts",
+  "remove_wip_path": "/root/acets-app/merge_requests/22/remove_wip",
+  "cancel_merge_when_pipeline_succeeds_path": "/root/acets-app/merge_requests/22/cancel_merge_when_pipeline_succeeds",
+  "create_issue_to_resolve_discussions_path": "/root/acets-app/issues/new?merge_request_to_resolve_discussions_of=22",
+  "merge_path": "/root/acets-app/merge_requests/22/merge",
+  "cherry_pick_in_fork_path": "/root/acets-app/forks?continue%5Bnotice%5D=You%27re+not+allowed+to+make+changes+to+this+project+directly.+A+fork+of+this+project+has+been+created+that+you+can+make+changes+in%2C+so+you+can+submit+a+merge+request.+Try+to+revert+this+commit+again.&continue%5Bnotice_now%5D=You%27re+not+allowed+to+make+changes+to+this+project+directly.+A+fork+of+this+project+is+being+created+that+you+can+make+changes+in%2C+so+you+can+submit+a+merge+request.&continue%5Bto%5D=%2Froot%2Facets-app%2Fmerge_requests%2F22&namespace_key=1",
+  "revert_in_fork_path": "/root/acets-app/forks?continue%5Bnotice%5D=You%27re+not+allowed+to+make+changes+to+this+project+directly.+A+fork+of+this+project+has+been+created+that+you+can+make+changes+in%2C+so+you+can+submit+a+merge+request.+Try+to+cherry-pick+this+commit+again.&continue%5Bnotice_now%5D=You%27re+not+allowed+to+make+changes+to+this+project+directly.+A+fork+of+this+project+is+being+created+that+you+can+make+changes+in%2C+so+you+can+submit+a+merge+request.&continue%5Bto%5D=%2Froot%2Facets-app%2Fmerge_requests%2F22&namespace_key=1",
+  "email_patches_path": "/root/acets-app/merge_requests/22.patch",
+  "plain_diff_path": "/root/acets-app/merge_requests/22.diff",
+  "ci_status_path": "/root/acets-app/merge_requests/22/ci_status",
+  "status_path": "/root/acets-app/merge_requests/22.json",
+  "merge_check_path": "/root/acets-app/merge_requests/22/merge_check",
+  "ci_environments_status_url": "/root/acets-app/merge_requests/22/ci_environments_status",
+  "project_archived": false,
+  "merge_commit_message_with_description": "Merge branch 'daaaa' into 'master'\n\nUpdate README.md\n\nSee merge request !22",
+  "diverged_commits_count": 0,
+  "only_allow_merge_if_pipeline_succeeds": false,
+  "commit_change_content_path": "/root/acets-app/merge_requests/22/commit_change_content"
+}
diff --git a/spec/javascripts/vue_mr_widget/mr_widget_options_spec.js b/spec/javascripts/vue_mr_widget/mr_widget_options_spec.js
new file mode 100644
index 00000000000..22ee7dcf0e7
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/mr_widget_options_spec.js
@@ -0,0 +1,326 @@
+import Vue from 'vue';
+import MRWidgetService from '~/vue_merge_request_widget/services/mr_widget_service';
+import mrWidgetOptions from '~/vue_merge_request_widget/mr_widget_options';
+import eventHub from '~/vue_merge_request_widget/event_hub';
+import mockData from './mock_data';
+
+const createComponent = () => {
+  delete mrWidgetOptions.el; // Prevent component mounting
+  gl.mrWidgetData = mockData;
+  const Component = Vue.extend(mrWidgetOptions);
+  return new Component();
+};
+
+const returnPromise = data => new Promise((resolve) => {
+  resolve({
+    json() {
+      return data;
+    },
+    body: data,
+  });
+});
+
+describe('mrWidgetOptions', () => {
+  let vm;
+
+  beforeEach(() => {
+    vm = createComponent();
+  });
+
+  describe('data', () => {
+    it('should instantiate Store and Service', () => {
+      expect(vm.mr).toBeDefined();
+      expect(vm.service).toBeDefined();
+    });
+  });
+
+  describe('computed', () => {
+    describe('componentName', () => {
+      it('should return merged component', () => {
+        expect(vm.componentName).toEqual('mr-widget-merged');
+      });
+
+      it('should return conflicts component', () => {
+        vm.mr.state = 'conflicts';
+        expect(vm.componentName).toEqual('mr-widget-conflicts');
+      });
+    });
+
+    describe('shouldRenderMergeHelp', () => {
+      it('should return false for the initial merged state', () => {
+        expect(vm.shouldRenderMergeHelp).toBeFalsy();
+      });
+
+      it('should return true for a state which requires help widget', () => {
+        vm.mr.state = 'conflicts';
+        expect(vm.shouldRenderMergeHelp).toBeTruthy();
+      });
+    });
+
+    describe('shouldRenderPipelines', () => {
+      it('should return true for the initial data', () => {
+        expect(vm.shouldRenderPipelines).toBeTruthy();
+      });
+
+      it('should return true when pipeline is empty but MR.hasCI is set to true', () => {
+        vm.mr.pipeline = {};
+        expect(vm.shouldRenderPipelines).toBeTruthy();
+      });
+
+      it('should return true when pipeline available', () => {
+        vm.mr.hasCI = false;
+        expect(vm.shouldRenderPipelines).toBeTruthy();
+      });
+
+      it('should return false when there is no pipeline', () => {
+        vm.mr.pipeline = {};
+        vm.mr.hasCI = false;
+        expect(vm.shouldRenderPipelines).toBeFalsy();
+      });
+    });
+
+    describe('shouldRenderRelatedLinks', () => {
+      it('should return false for the initial data', () => {
+        expect(vm.shouldRenderRelatedLinks).toBeFalsy();
+      });
+
+      it('should return true if there is relatedLinks in MR', () => {
+        vm.mr.relatedLinks = {};
+        expect(vm.shouldRenderRelatedLinks).toBeTruthy();
+      });
+    });
+
+    describe('shouldRenderDeployments', () => {
+      it('should return false for the initial data', () => {
+        expect(vm.shouldRenderDeployments).toBeFalsy();
+      });
+
+      it('should return true if there is deployments', () => {
+        vm.mr.deployments.push({}, {});
+        expect(vm.shouldRenderDeployments).toBeTruthy();
+      });
+    });
+  });
+
+  describe('methods', () => {
+    describe('checkStatus', () => {
+      it('should tell service to check status', (done) => {
+        spyOn(vm.service, 'checkStatus').and.returnValue(returnPromise(mockData));
+        spyOn(vm.mr, 'setData');
+        let isCbExecuted = false;
+        const cb = () => {
+          isCbExecuted = true;
+        };
+
+        vm.checkStatus(cb);
+
+        setTimeout(() => {
+          expect(vm.service.checkStatus).toHaveBeenCalled();
+          expect(vm.mr.setData).toHaveBeenCalled();
+          expect(isCbExecuted).toBeTruthy();
+          done();
+        }, 333);
+      });
+    });
+
+    describe('initPolling', () => {
+      it('should call SmartInterval', () => {
+        spyOn(gl, 'SmartInterval').and.returnValue({
+          resume() {},
+          stopTimer() {},
+        });
+        vm.initPolling();
+
+        expect(vm.pollingInterval).toBeDefined();
+        expect(gl.SmartInterval).toHaveBeenCalled();
+      });
+    });
+
+    describe('initDeploymentsPolling', () => {
+      it('should call SmartInterval', () => {
+        spyOn(gl, 'SmartInterval');
+        vm.initDeploymentsPolling();
+
+        expect(vm.deploymentsInterval).toBeDefined();
+        expect(gl.SmartInterval).toHaveBeenCalled();
+      });
+    });
+
+    describe('fetchDeployments', () => {
+      it('should fetch deployments', (done) => {
+        spyOn(vm.service, 'fetchDeployments').and.returnValue(returnPromise([{ deployment: 1 }]));
+
+        vm.fetchDeployments();
+
+        setTimeout(() => {
+          expect(vm.service.fetchDeployments).toHaveBeenCalled();
+          expect(vm.mr.deployments.length).toEqual(1);
+          expect(vm.mr.deployments[0].deployment).toEqual(1);
+          done();
+        }, 333);
+      });
+    });
+
+    describe('fetchActionsContent', () => {
+      it('should fetch content of Cherry Pick and Revert modals', (done) => {
+        spyOn(vm.service, 'fetchMergeActionsContent').and.returnValue(returnPromise('hello world'));
+
+        vm.fetchActionsContent();
+
+        setTimeout(() => {
+          expect(vm.service.fetchMergeActionsContent).toHaveBeenCalled();
+          expect(document.body.textContent).toContain('hello world');
+          done();
+        }, 333);
+      });
+    });
+
+    describe('bindEventHubListeners', () => {
+      it('should bind eventHub listeners', () => {
+        spyOn(vm, 'checkStatus').and.returnValue(() => {});
+        spyOn(vm.service, 'checkStatus').and.returnValue(returnPromise(mockData));
+        spyOn(vm, 'fetchActionsContent');
+        spyOn(vm.mr, 'setData');
+        spyOn(vm, 'resumePolling');
+        spyOn(vm, 'stopPolling');
+        spyOn(eventHub, '$on');
+
+        vm.bindEventHubListeners();
+
+        eventHub.$emit('SetBranchRemoveFlag', ['flag']);
+        expect(vm.mr.isRemovingSourceBranch).toEqual('flag');
+
+        eventHub.$emit('FailedToMerge');
+        expect(vm.mr.state).toEqual('failedToMerge');
+
+        eventHub.$emit('UpdateWidgetData', mockData);
+        expect(vm.mr.setData).toHaveBeenCalledWith(mockData);
+
+        eventHub.$emit('EnablePolling');
+        expect(vm.resumePolling).toHaveBeenCalled();
+
+        eventHub.$emit('DisablePolling');
+        expect(vm.stopPolling).toHaveBeenCalled();
+
+        const listenersWithServiceRequest = {
+          MRWidgetUpdateRequested: true,
+          FetchActionsContent: true,
+        };
+
+        const allArgs = eventHub.$on.calls.allArgs();
+        allArgs.forEach((params) => {
+          const eventName = params[0];
+          const callback = params[1];
+
+          if (listenersWithServiceRequest[eventName]) {
+            listenersWithServiceRequest[eventName] = callback;
+          }
+        });
+
+        listenersWithServiceRequest.MRWidgetUpdateRequested();
+        expect(vm.checkStatus).toHaveBeenCalled();
+
+        listenersWithServiceRequest.FetchActionsContent();
+        expect(vm.fetchActionsContent).toHaveBeenCalled();
+      });
+    });
+
+    describe('handleMounted', () => {
+      it('should call required methods to do the initial kick-off', () => {
+        spyOn(vm, 'checkStatus');
+        spyOn(vm, 'initDeploymentsPolling');
+        spyOn(vm, 'setFavicon');
+
+        vm.handleMounted();
+
+        expect(vm.checkStatus).toHaveBeenCalled();
+        expect(vm.setFavicon).toHaveBeenCalled();
+        expect(vm.initDeploymentsPolling).toHaveBeenCalled();
+      });
+    });
+
+    describe('setFavicon', () => {
+      it('should call setFavicon method', () => {
+        spyOn(gl.utils, 'setFavicon');
+        vm.setFavicon();
+
+        expect(gl.utils.setFavicon).toHaveBeenCalledWith(vm.mr.ciStatusFaviconPath);
+      });
+
+      it('should not call setFavicon when there is no ciStatusFaviconPath', () => {
+        spyOn(gl.utils, 'setFavicon');
+        vm.mr.ciStatusFaviconPath = null;
+        vm.setFavicon();
+
+        expect(gl.utils.setFavicon).not.toHaveBeenCalled();
+      });
+    });
+
+    describe('resumePolling', () => {
+      it('should call stopTimer on pollingInterval', () => {
+        spyOn(vm.pollingInterval, 'resume');
+
+        vm.resumePolling();
+        expect(vm.pollingInterval.resume).toHaveBeenCalled();
+      });
+    });
+
+    describe('stopPolling', () => {
+      it('should call stopTimer on pollingInterval', () => {
+        spyOn(vm.pollingInterval, 'stopTimer');
+
+        vm.stopPolling();
+        expect(vm.pollingInterval.stopTimer).toHaveBeenCalled();
+      });
+    });
+
+    describe('createService', () => {
+      it('should instantiate a Service', () => {
+        const endpoints = {
+          mergePath: '/nice/path',
+          mergeCheckPath: '/nice/path',
+          cancelAutoMergePath: '/nice/path',
+          removeWIPPath: '/nice/path',
+          sourceBranchPath: '/nice/path',
+          ciEnvironmentsStatusPath: '/nice/path',
+          statusPath: '/nice/path',
+          mergeActionsContentPath: '/nice/path',
+        };
+
+        const serviceInstance = vm.createService(endpoints);
+        const isInstanceOfMRService = serviceInstance instanceof MRWidgetService;
+        expect(isInstanceOfMRService).toBe(true);
+        Object.keys(serviceInstance).forEach((key) => {
+          expect(serviceInstance[key]).toBeDefined();
+        });
+      });
+    });
+  });
+
+  describe('components', () => {
+    it('should register all components', () => {
+      const comps = mrWidgetOptions.components;
+      expect(comps['mr-widget-header']).toBeDefined();
+      expect(comps['mr-widget-merge-help']).toBeDefined();
+      expect(comps['mr-widget-pipeline']).toBeDefined();
+      expect(comps['mr-widget-deployment']).toBeDefined();
+      expect(comps['mr-widget-related-links']).toBeDefined();
+      expect(comps['mr-widget-merged']).toBeDefined();
+      expect(comps['mr-widget-closed']).toBeDefined();
+      expect(comps['mr-widget-locked']).toBeDefined();
+      expect(comps['mr-widget-failed-to-merge']).toBeDefined();
+      expect(comps['mr-widget-wip']).toBeDefined();
+      expect(comps['mr-widget-archived']).toBeDefined();
+      expect(comps['mr-widget-conflicts']).toBeDefined();
+      expect(comps['mr-widget-nothing-to-merge']).toBeDefined();
+      expect(comps['mr-widget-not-allowed']).toBeDefined();
+      expect(comps['mr-widget-missing-branch']).toBeDefined();
+      expect(comps['mr-widget-ready-to-merge']).toBeDefined();
+      expect(comps['mr-widget-checking']).toBeDefined();
+      expect(comps['mr-widget-unresolved-discussions']).toBeDefined();
+      expect(comps['mr-widget-pipeline-blocked']).toBeDefined();
+      expect(comps['mr-widget-pipeline-failed']).toBeDefined();
+      expect(comps['mr-widget-merge-when-pipeline-succeeds']).toBeDefined();
+    });
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/services/mr_widget_service_spec.js b/spec/javascripts/vue_mr_widget/services/mr_widget_service_spec.js
new file mode 100644
index 00000000000..b63633c03b8
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/services/mr_widget_service_spec.js
@@ -0,0 +1,46 @@
+import Vue from 'vue';
+import VueResource from 'vue-resource';
+import MRWidgetService from '~/vue_merge_request_widget/services/mr_widget_service';
+
+Vue.use(VueResource);
+
+describe('MRWidgetService', () => {
+  const mr = {
+    mergePath: './',
+    mergeCheckPath: './',
+    cancelAutoMergePath: './',
+    removeWIPPath: './',
+    sourceBranchPath: './',
+    ciEnvironmentsStatusPath: './',
+    statusPath: './',
+    mergeActionsContentPath: './',
+    isServiceStore: true,
+  };
+
+  it('should have store and resources created in constructor', () => {
+    const service = new MRWidgetService(mr);
+
+    expect(service.mergeResource).toBeDefined();
+    expect(service.mergeCheckResource).toBeDefined();
+    expect(service.cancelAutoMergeResource).toBeDefined();
+    expect(service.removeWIPResource).toBeDefined();
+    expect(service.removeSourceBranchResource).toBeDefined();
+    expect(service.deploymentsResource).toBeDefined();
+    expect(service.pollResource).toBeDefined();
+    expect(service.mergeActionsContentResource).toBeDefined();
+  });
+
+  it('should have methods defined', () => {
+    const service = new MRWidgetService(mr);
+
+    expect(service.merge()).toBeDefined();
+    expect(service.cancelAutomaticMerge()).toBeDefined();
+    expect(service.removeWIP()).toBeDefined();
+    expect(service.removeSourceBranch()).toBeDefined();
+    expect(service.fetchDeployments()).toBeDefined();
+    expect(service.poll()).toBeDefined();
+    expect(service.checkStatus()).toBeDefined();
+    expect(service.fetchMergeActionsContent()).toBeDefined();
+    expect(MRWidgetService.stopEnvironment()).toBeDefined();
+  });
+});
diff --git a/spec/javascripts/vue_mr_widget/stores/get_state_key_spec.js b/spec/javascripts/vue_mr_widget/stores/get_state_key_spec.js
new file mode 100644
index 00000000000..ee944f4d4e5
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/stores/get_state_key_spec.js
@@ -0,0 +1,62 @@
+import getStateKey from '~/vue_merge_request_widget/stores/get_state_key';
+
+describe('getStateKey', () => {
+  it('should return proper state name', () => {
+    const context = {
+      mergeStatus: 'checked',
+      mergeWhenPipelineSucceeds: false,
+      canMerge: true,
+      onlyAllowMergeIfPipelineSucceeds: false,
+      isPipelineFailed: false,
+      hasMergeableDiscussionsState: false,
+      isPipelineBlocked: false,
+      canBeMerged: false,
+    };
+    const data = {
+      project_archived: false,
+      branch_missing: false,
+      commits_count: 2,
+      has_conflicts: false,
+      work_in_progress: false,
+    };
+    const bound = getStateKey.bind(context, data);
+    expect(bound()).toEqual(null);
+
+    context.canBeMerged = true;
+    expect(bound()).toEqual('readyToMerge');
+
+    context.isPipelineBlocked = true;
+    expect(bound()).toEqual('pipelineBlocked');
+
+    context.hasMergeableDiscussionsState = true;
+    expect(bound()).toEqual('unresolvedDiscussions');
+
+    context.onlyAllowMergeIfPipelineSucceeds = true;
+    context.isPipelineFailed = true;
+    expect(bound()).toEqual('pipelineFailed');
+
+    context.canMerge = false;
+    expect(bound()).toEqual('notAllowedToMerge');
+
+    context.mergeWhenPipelineSucceeds = true;
+    expect(bound()).toEqual('mergeWhenPipelineSucceeds');
+
+    data.work_in_progress = true;
+    expect(bound()).toEqual('workInProgress');
+
+    data.has_conflicts = true;
+    expect(bound()).toEqual('conflicts');
+
+    context.mergeStatus = 'unchecked';
+    expect(bound()).toEqual('checking');
+
+    data.commits_count = 0;
+    expect(bound()).toEqual('nothingToMerge');
+
+    data.branch_missing = true;
+    expect(bound()).toEqual('missingBranch');
+
+    data.project_archived = true;
+    expect(bound()).toEqual('archived');
+  });
+});
diff --git a/spec/lib/gitlab/prometheus_spec.rb b/spec/lib/gitlab/prometheus_spec.rb
index fc453a2704b..9d67e3d2f37 100644
--- a/spec/lib/gitlab/prometheus_spec.rb
+++ b/spec/lib/gitlab/prometheus_spec.rb
@@ -81,7 +81,11 @@ describe Gitlab::Prometheus, lib: true do
 
   describe '#query' do
     let(:prometheus_query) { prometheus_cpu_query('env-slug') }
-    let(:query_url) { prometheus_query_url(prometheus_query) }
+    let(:query_url) { prometheus_query_with_time_url(prometheus_query, Time.now.utc) }
+
+    around do |example|
+      Timecop.freeze { example.run }
+    end
 
     context 'when request returns vector results' do
       it 'returns data from the API call' do
@@ -123,6 +127,20 @@ describe Gitlab::Prometheus, lib: true do
       Timecop.freeze { example.run }
     end
 
+    context 'when non utc time is passed' do
+      let(:time_stop) { Time.now.in_time_zone("Warsaw") }
+      let(:time_start) { time_stop - 8.hours }
+
+      let(:query_url) { prometheus_query_range_url(prometheus_query, start: time_start.utc.to_f, stop: time_stop.utc.to_f) }
+
+      it 'passed dates are properly converted to utc' do
+        req_stub = stub_prometheus_request(query_url, body: prometheus_values_body('vector'))
+
+        subject.query_range(prometheus_query, start: time_start, stop: time_stop)
+        expect(req_stub).to have_been_requested
+      end
+    end
+
     context 'when a start time is passed' do
       let(:query_url) { prometheus_query_range_url(prometheus_query, start: 2.hours.ago) }
 
diff --git a/spec/models/deployment_spec.rb b/spec/models/deployment_spec.rb
index 080ff2f3f43..212fcd884a8 100644
--- a/spec/models/deployment_spec.rb
+++ b/spec/models/deployment_spec.rb
@@ -49,6 +49,33 @@ describe Deployment, models: true do
     end
   end
 
+  describe '#metrics' do
+    let(:deployment) { create(:deployment) }
+
+    subject { deployment.metrics(1.hour) }
+
+    context 'metrics are disabled' do
+      it { is_expected.to eq({}) }
+    end
+
+    context 'metrics are enabled' do
+      let(:simple_metrics) do
+        {
+          success: true,
+          metrics: {},
+          last_update: 42
+        }
+      end
+
+      before do
+        allow(deployment.project).to receive_message_chain(:monitoring_service, :metrics)
+                                       .with(any_args).and_return(simple_metrics)
+      end
+
+      it { is_expected.to eq(simple_metrics.merge(deployment_time: deployment.created_at.utc.to_i)) }
+    end
+  end
+
   describe '#stop_action' do
     let(:build) { create(:ci_build) }
 
diff --git a/spec/models/project_services/prometheus_service_spec.rb b/spec/models/project_services/prometheus_service_spec.rb
index f3126bc1e57..82a3e2698c1 100644
--- a/spec/models/project_services/prometheus_service_spec.rb
+++ b/spec/models/project_services/prometheus_service_spec.rb
@@ -47,15 +47,30 @@ describe PrometheusService, models: true, caching: true do
 
   describe '#metrics' do
     let(:environment) { build_stubbed(:environment, slug: 'env-slug') }
-    subject { service.metrics(environment) }
 
     around do |example|
       Timecop.freeze { example.run }
     end
 
-    context 'with valid data' do
+    context 'with valid data without time range' do
+      subject { service.metrics(environment) }
+
+      before do
+        stub_reactive_cache(service, prometheus_data, 'env-slug', nil, nil)
+      end
+
+      it 'returns reactive data' do
+        is_expected.to eq(prometheus_data)
+      end
+    end
+
+    context 'with valid data with time range' do
+      let(:t_start) { 1.hour.ago.utc }
+      let(:t_end) { Time.now.utc }
+      subject { service.metrics(environment, timeframe_start: t_start, timeframe_end: t_end) }
+
       before do
-        stub_reactive_cache(service, prometheus_data, 'env-slug')
+        stub_reactive_cache(service, prometheus_data, 'env-slug', t_start, t_end)
       end
 
       it 'returns reactive data' do
@@ -72,7 +87,7 @@ describe PrometheusService, models: true, caching: true do
     end
 
     subject do
-      service.calculate_reactive_cache(environment.slug)
+      service.calculate_reactive_cache(environment.slug, nil, nil)
     end
 
     context 'when service is inactive' do
diff --git a/spec/presenters/merge_request_presenter_spec.rb b/spec/presenters/merge_request_presenter_spec.rb
new file mode 100644
index 00000000000..e599ddaf943
--- /dev/null
+++ b/spec/presenters/merge_request_presenter_spec.rb
@@ -0,0 +1,356 @@
+require 'spec_helper'
+
+describe MergeRequestPresenter do
+  let(:resource) { create :merge_request, source_project: project }
+  let(:project) { create :empty_project }
+  let(:user) { create(:user) }
+
+  describe '#ci_status' do
+    subject { described_class.new(resource).ci_status }
+
+    context 'when no head pipeline' do
+      it 'return status using CiService' do
+        ci_service = double(MockCiService)
+        ci_status = double
+
+        allow(resource.source_project)
+          .to receive(:ci_service)
+          .and_return(ci_service)
+
+        allow(resource).to receive(:head_pipeline).and_return(nil)
+
+        expect(ci_service).to receive(:commit_status)
+          .with(resource.diff_head_sha, resource.source_branch)
+          .and_return(ci_status)
+
+        is_expected.to eq(ci_status)
+      end
+    end
+
+    context 'when head pipeline present' do
+      let(:pipeline) { build_stubbed(:ci_pipeline) }
+
+      before do
+        allow(resource).to receive(:head_pipeline).and_return(pipeline)
+      end
+
+      context 'success with warnings' do
+        before do
+          allow(pipeline).to receive(:success?) { true }
+          allow(pipeline).to receive(:has_warnings?) { true }
+        end
+
+        it 'returns "success_with_warnings"' do
+          is_expected.to eq('success_with_warnings')
+        end
+      end
+
+      context 'pipeline HAS status AND its not success with warnings' do
+        before do
+          allow(pipeline).to receive(:success?) { false }
+          allow(pipeline).to receive(:has_warnings?) { false }
+        end
+
+        it 'returns pipeline status' do
+          is_expected.to eq('pending')
+        end
+      end
+
+      context 'pipeline has NO status AND its not success with warnings' do
+        before do
+          allow(pipeline).to receive(:status) { nil }
+          allow(pipeline).to receive(:success?) { false }
+          allow(pipeline).to receive(:has_warnings?) { false }
+        end
+
+        it 'returns "preparing"' do
+          is_expected.to eq('preparing')
+        end
+      end
+    end
+  end
+
+  describe '#conflict_resolution_path' do
+    let(:project) { create :empty_project }
+    let(:user) { create :user }
+    let(:path) { described_class.new(resource, current_user: user).conflict_resolution_path }
+
+    context 'when MR cannot be resolved in UI' do
+      it 'does not return conflict resolution path' do
+        allow(resource).to receive(:conflicts_can_be_resolved_in_ui?) { true }
+        allow(resource).to receive(:conflicts_can_be_resolved_by?).with(user) { false }
+
+        expect(path).to be_nil
+      end
+    end
+
+    context 'when conflicts cannot be resolved by user' do
+      it 'does not return conflict resolution path' do
+        allow(resource).to receive(:conflicts_can_be_resolved_in_ui?) { false }
+        allow(resource).to receive(:conflicts_can_be_resolved_by?).with(user) { true }
+
+        expect(path).to be_nil
+      end
+    end
+
+    context 'when able to access conflict resolution UI' do
+      it 'does return conflict resolution path' do
+        allow(resource).to receive(:conflicts_can_be_resolved_in_ui?) { true }
+        allow(resource).to receive(:conflicts_can_be_resolved_by?).with(user) { true }
+
+        expect(path)
+          .to eq("/#{project.full_path}/merge_requests/#{resource.iid}/conflicts")
+      end
+    end
+  end
+
+  context 'issues links' do
+    let(:project) { create(:project, :private, creator: user, namespace: user.namespace) }
+    let(:issue_a) { create(:issue, project: project) }
+    let(:issue_b) { create(:issue, project: project) }
+
+    let(:resource) do
+      create(:merge_request,
+             source_project: project, target_project: project,
+             description: "Fixes #{issue_a.to_reference} Related #{issue_b.to_reference}")
+    end
+
+    before do
+      project.team << [user, :developer]
+
+      allow(resource.project).to receive(:default_branch)
+        .and_return(resource.target_branch)
+    end
+
+    describe '#closing_issues_links' do
+      subject { described_class.new(resource, current_user: user).closing_issues_links }
+
+      it 'presents closing issues links' do
+        is_expected.to match("#{project.full_path}/issues/#{issue_a.iid}")
+      end
+
+      it 'does not present related issues links' do
+        is_expected.not_to match("#{project.full_path}/issues/#{issue_b.iid}")
+      end
+    end
+
+    describe '#mentioned_issues_links' do
+      subject do
+        described_class.new(resource, current_user: user)
+          .mentioned_issues_links
+      end
+
+      it 'presents related issues links' do
+        is_expected.to match("#{project.full_path}/issues/#{issue_b.iid}")
+      end
+
+      it 'does not present closing issues links' do
+        is_expected.not_to match("#{project.full_path}/issues/#{issue_a.iid}")
+      end
+    end
+
+    describe '#assign_to_closing_issues_link' do
+      subject do
+        described_class.new(resource, current_user: user)
+          .assign_to_closing_issues_link
+      end
+
+      before do
+        assign_issues_service = double(MergeRequests::AssignIssuesService, assignable_issues: assignable_issues)
+        allow(MergeRequests::AssignIssuesService).to receive(:new)
+          .and_return(assign_issues_service)
+      end
+
+      context 'single closing issue' do
+        let(:issue) { create(:issue) }
+        let(:assignable_issues) { [issue] }
+
+        it 'returns correct link with correct text' do
+          is_expected
+            .to match("#{project.full_path}/merge_requests/#{resource.iid}/assign_related_issues")
+
+          is_expected
+            .to match("Assign yourself to this issue")
+        end
+      end
+
+      context 'multiple closing issues' do
+        let(:issues) { create_list(:issue, 2) }
+        let(:assignable_issues) { issues }
+
+        it 'returns correct link with correct text' do
+          is_expected
+            .to match("#{project.full_path}/merge_requests/#{resource.iid}/assign_related_issues")
+
+          is_expected
+            .to match("Assign yourself to these issues")
+        end
+      end
+
+      context 'no closing issue' do
+        let(:assignable_issues) { [] }
+
+        it 'returns correct link with correct text' do
+          is_expected.to be_nil
+        end
+      end
+    end
+  end
+
+  describe '#cancel_merge_when_pipeline_succeeds_path' do
+    subject do
+      described_class.new(resource, current_user: user)
+        .cancel_merge_when_pipeline_succeeds_path
+    end
+
+    context 'when can cancel mwps' do
+      it 'returns path' do
+        allow(resource).to receive(:can_cancel_merge_when_pipeline_succeeds?)
+          .with(user)
+          .and_return(true)
+
+        is_expected.to eq("/#{resource.project.full_path}/merge_requests/#{resource.iid}/cancel_merge_when_pipeline_succeeds")
+      end
+    end
+
+    context 'when cannot cancel mwps' do
+      it 'returns nil' do
+        allow(resource).to receive(:can_cancel_merge_when_pipeline_succeeds?)
+          .with(user)
+          .and_return(false)
+
+        is_expected.to be_nil
+      end
+    end
+  end
+
+  describe '#merge_path' do
+    subject do
+      described_class.new(resource, current_user: user).merge_path
+    end
+
+    context 'when can be merged by user' do
+      it 'returns path' do
+        allow(resource).to receive(:can_be_merged_by?)
+          .with(user)
+          .and_return(true)
+
+        is_expected
+          .to eq("/#{resource.project.full_path}/merge_requests/#{resource.iid}/merge")
+      end
+    end
+
+    context 'when cannot be merged by user' do
+      it 'returns nil' do
+        allow(resource).to receive(:can_be_merged_by?)
+          .with(user)
+          .and_return(false)
+
+        is_expected.to be_nil
+      end
+    end
+  end
+
+  describe '#create_issue_to_resolve_discussions_path' do
+    subject do
+      described_class.new(resource, current_user: user)
+        .create_issue_to_resolve_discussions_path
+    end
+
+    context 'when can create issue and issues enabled' do
+      it 'returns path' do
+        allow(project).to receive(:issues_enabled?) { true }
+        project.team << [user, :master]
+
+        is_expected
+          .to eq("/#{resource.project.full_path}/issues/new?merge_request_to_resolve_discussions_of=#{resource.iid}")
+      end
+    end
+
+    context 'when cannot create issue' do
+      it 'returns nil' do
+        allow(project).to receive(:issues_enabled?) { true }
+
+        is_expected.to be_nil
+      end
+    end
+
+    context 'when issues disabled' do
+      it 'returns nil' do
+        allow(project).to receive(:issues_enabled?) { false }
+        project.team << [user, :master]
+
+        is_expected.to be_nil
+      end
+    end
+  end
+
+  describe '#remove_wip_path' do
+    subject do
+      described_class.new(resource, current_user: user).remove_wip_path
+    end
+
+    context 'when merge request enabled and has permission' do
+      it 'has remove_wip_path' do
+        allow(project).to receive(:merge_requests_enabled?) { true }
+        project.team << [user, :master]
+
+        is_expected
+          .to eq("/#{resource.project.full_path}/merge_requests/#{resource.iid}/remove_wip")
+      end
+    end
+
+    context 'when has no permission' do
+      it 'returns nil' do
+        is_expected.to be_nil
+      end
+    end
+  end
+
+  describe '#target_branch_commits_path' do
+    subject do
+      described_class.new(resource, current_user: user)
+        .target_branch_commits_path
+    end
+
+    context 'when target branch exists' do
+      it 'returns path' do
+        allow(resource).to receive(:target_branch_exists?) { true }
+
+        is_expected
+          .to eq("/#{resource.target_project.full_path}/commits/#{resource.target_branch}")
+      end
+    end
+
+    context 'when target branch does not exists' do
+      it 'returns nil' do
+        allow(resource).to receive(:target_branch_exists?) { false }
+
+        is_expected.to be_nil
+      end
+    end
+  end
+
+  describe '#source_branch_path' do
+    subject do
+      described_class.new(resource, current_user: user).source_branch_path
+    end
+
+    context 'when source branch exists' do
+      it 'returns path' do
+        allow(resource).to receive(:source_branch_exists?) { true }
+
+        is_expected
+          .to eq("/#{resource.source_project.full_path}/branches/#{resource.source_branch}")
+      end
+    end
+
+    context 'when source branch does not exists' do
+      it 'returns nil' do
+        allow(resource).to receive(:source_branch_exists?) { false }
+
+        is_expected.to be_nil
+      end
+    end
+  end
+end
diff --git a/spec/serializers/build_entity_spec.rb b/spec/serializers/build_entity_spec.rb
index 897a28b7305..b5eb84ae43b 100644
--- a/spec/serializers/build_entity_spec.rb
+++ b/spec/serializers/build_entity_spec.rb
@@ -6,7 +6,7 @@ describe BuildEntity do
   let(:request) { double('request') }
 
   before do
-    allow(request).to receive(:user).and_return(user)
+    allow(request).to receive(:current_user).and_return(user)
   end
 
   let(:entity) do
diff --git a/spec/serializers/build_serializer_spec.rb b/spec/serializers/build_serializer_spec.rb
index 7f1abecfafe..01e2cfed6f8 100644
--- a/spec/serializers/build_serializer_spec.rb
+++ b/spec/serializers/build_serializer_spec.rb
@@ -4,7 +4,7 @@ describe BuildSerializer do
   let(:user) { create(:user) }
 
   let(:serializer) do
-    described_class.new(user: user)
+    described_class.new(current_user: user)
   end
 
   subject { serializer.represent(resource) }
diff --git a/spec/serializers/deployment_entity_spec.rb b/spec/serializers/deployment_entity_spec.rb
index 69355bcde42..522c92ce295 100644
--- a/spec/serializers/deployment_entity_spec.rb
+++ b/spec/serializers/deployment_entity_spec.rb
@@ -8,7 +8,7 @@ describe DeploymentEntity do
   subject { entity.as_json }
 
   before do
-    allow(request).to receive(:user).and_return(user)
+    allow(request).to receive(:current_user).and_return(user)
   end
 
   it 'exposes internal deployment id'  do
diff --git a/spec/serializers/environment_serializer_spec.rb b/spec/serializers/environment_serializer_spec.rb
index 1909e6385b5..d2ad6c44702 100644
--- a/spec/serializers/environment_serializer_spec.rb
+++ b/spec/serializers/environment_serializer_spec.rb
@@ -6,7 +6,7 @@ describe EnvironmentSerializer do
 
   let(:json) do
     described_class
-      .new(user: user, project: project)
+      .new(current_user: user, project: project)
       .represent(resource)
   end
 
diff --git a/spec/serializers/event_entity_spec.rb b/spec/serializers/event_entity_spec.rb
new file mode 100644
index 00000000000..bb54597c967
--- /dev/null
+++ b/spec/serializers/event_entity_spec.rb
@@ -0,0 +1,13 @@
+require 'spec_helper'
+
+describe EventEntity do
+  subject { described_class.represent(create(:event)).as_json }
+
+  it 'exposes author' do
+    expect(subject).to include(:author)
+  end
+
+  it 'exposes core elements of event' do
+    expect(subject).to include(:updated_at)
+  end
+end
diff --git a/spec/serializers/merge_request_basic_serializer_spec.rb b/spec/serializers/merge_request_basic_serializer_spec.rb
new file mode 100644
index 00000000000..4daf5a59d0c
--- /dev/null
+++ b/spec/serializers/merge_request_basic_serializer_spec.rb
@@ -0,0 +1,12 @@
+require 'spec_helper'
+
+describe MergeRequestBasicSerializer do
+  let(:resource) { create(:merge_request) }
+  let(:user)     { create(:user) }
+
+  subject { described_class.new.represent(resource) }
+
+  it 'has important MergeRequest attributes' do
+    expect(subject).to include(:merge_status)
+  end
+end
diff --git a/spec/serializers/merge_request_entity_spec.rb b/spec/serializers/merge_request_entity_spec.rb
new file mode 100644
index 00000000000..bb6e83ae4bd
--- /dev/null
+++ b/spec/serializers/merge_request_entity_spec.rb
@@ -0,0 +1,128 @@
+require 'spec_helper'
+
+describe MergeRequestEntity do
+  let(:project)  { create :empty_project }
+  let(:resource) { create(:merge_request, source_project: project, target_project: project) }
+  let(:user)     { create(:user) }
+
+  let(:request) { double('request', current_user: user) }
+
+  subject do
+    described_class.new(resource, request: request).as_json
+  end
+
+  it 'includes author' do
+    req = double('request')
+
+    author_payload = UserEntity
+      .represent(resource.author, request: req)
+      .as_json
+
+    expect(subject[:author]).to eq(author_payload)
+  end
+
+  it 'includes pipeline' do
+    req = double('request', current_user: user)
+    pipeline = build_stubbed(:ci_pipeline)
+    allow(resource).to receive(:head_pipeline).and_return(pipeline)
+
+    pipeline_payload = PipelineEntity
+      .represent(pipeline, request: req)
+      .as_json
+
+    expect(subject[:pipeline]).to eq(pipeline_payload)
+  end
+
+  it 'includes issues_links' do
+    issues_links = subject[:issues_links]
+
+    expect(issues_links).to include(:closing, :mentioned_but_not_closing,
+                                    :assign_to_closing)
+  end
+
+  it 'has important MergeRequest attributes' do
+    expect(subject).to include(:diff_head_sha, :merge_commit_message,
+                               :has_conflicts, :has_ci, :merge_path,
+                               :conflict_resolution_path,
+                               :cancel_merge_when_pipeline_succeeds_path,
+                               :create_issue_to_resolve_discussions_path,
+                               :source_branch_path, :target_branch_commits_path,
+                               :commits_count)
+  end
+
+  it 'has email_patches_path' do
+    expect(subject[:email_patches_path])
+      .to eq("/#{resource.project.full_path}/merge_requests/#{resource.iid}.patch")
+  end
+
+  it 'has plain_diff_path' do
+    expect(subject[:plain_diff_path])
+      .to eq("/#{resource.project.full_path}/merge_requests/#{resource.iid}.diff")
+  end
+
+  it 'has merge_commit_message_with_description' do
+    expect(subject[:merge_commit_message_with_description])
+      .to eq(resource.merge_commit_message(include_description: true))
+  end
+
+  describe 'diff_head_sha' do
+    before do
+      allow(resource).to receive(:diff_head_sha) { 'sha' }
+    end
+
+    context 'when no diff head commit' do
+      it 'returns nil' do
+        allow(resource).to receive(:diff_head_commit) { nil }
+
+        expect(subject[:diff_head_sha]).to be_nil
+      end
+    end
+
+    context 'when diff head commit present' do
+      it 'returns diff head commit short id' do
+        allow(resource).to receive(:diff_head_commit) { double }
+
+        expect(subject[:diff_head_sha]).to eq('sha')
+      end
+    end
+  end
+
+  it 'includes merge_event' do
+    create(:event, :merged, author: user, project: resource.project, target: resource)
+
+    expect(subject[:merge_event]).to include(:author, :updated_at)
+  end
+
+  it 'includes closed_event' do
+    create(:event, :closed, author: user, project: resource.project, target: resource)
+
+    expect(subject[:closed_event]).to include(:author, :updated_at)
+  end
+
+  describe 'diverged_commits_count' do
+    context 'when MR open and its diverging' do
+      it 'returns diverged commits count' do
+        allow(resource).to receive_messages(open?: true, diverged_from_target_branch?: true,
+                                            diverged_commits_count: 10)
+
+        expect(subject[:diverged_commits_count]).to eq(10)
+      end
+    end
+
+    context 'when MR is not open' do
+      it 'returns 0' do
+        allow(resource).to receive_messages(open?: false)
+
+        expect(subject[:diverged_commits_count]).to be_zero
+      end
+    end
+
+    context 'when MR is not diverging' do
+      it 'returns 0' do
+        allow(resource).to receive_messages(open?: true, diverged_from_target_branch?: false)
+
+        expect(subject[:diverged_commits_count]).to be_zero
+      end
+    end
+  end
+end
diff --git a/spec/serializers/merge_request_serializer_spec.rb b/spec/serializers/merge_request_serializer_spec.rb
new file mode 100644
index 00000000000..73fbecc153d
--- /dev/null
+++ b/spec/serializers/merge_request_serializer_spec.rb
@@ -0,0 +1,37 @@
+require 'spec_helper'
+
+describe MergeRequestSerializer do
+  let(:user) { build_stubbed(:user) }
+  let(:merge_request) { build_stubbed(:merge_request) }
+
+  let(:serializer) do
+    described_class.new(current_user: user)
+  end
+
+  describe '#represent' do
+    let(:opts) { { basic: basic } }
+    subject { serializer.represent(merge_request, basic: basic) }
+
+    context 'when basic param is truthy' do
+      let(:basic) { true }
+
+      it 'calls super class #represent with correct params' do
+        expect_any_instance_of(BaseSerializer).to receive(:represent)
+          .with(merge_request, opts, MergeRequestBasicEntity)
+
+        subject
+      end
+    end
+
+    context 'when basic param is falsy' do
+      let(:basic) { false }
+
+      it 'calls super class #represent with correct params' do
+        expect_any_instance_of(BaseSerializer).to receive(:represent)
+          .with(merge_request, opts, MergeRequestEntity)
+
+        subject
+      end
+    end
+  end
+end
diff --git a/spec/serializers/pipeline_entity_spec.rb b/spec/serializers/pipeline_entity_spec.rb
index 93d5a21419d..d2482ac434b 100644
--- a/spec/serializers/pipeline_entity_spec.rb
+++ b/spec/serializers/pipeline_entity_spec.rb
@@ -5,7 +5,7 @@ describe PipelineEntity do
   let(:request) { double('request') }
 
   before do
-    allow(request).to receive(:user).and_return(user)
+    allow(request).to receive(:current_user).and_return(user)
   end
 
   let(:entity) do
@@ -19,7 +19,7 @@ describe PipelineEntity do
       let(:pipeline) { create(:ci_empty_pipeline) }
 
       it 'contains required fields' do
-        expect(subject).to include :id, :user, :path
+        expect(subject).to include :id, :user, :path, :coverage
         expect(subject).to include :ref, :commit
         expect(subject).to include :updated_at, :created_at
       end
diff --git a/spec/serializers/pipeline_serializer_spec.rb b/spec/serializers/pipeline_serializer_spec.rb
index ecde45a6d44..f2426db6d81 100644
--- a/spec/serializers/pipeline_serializer_spec.rb
+++ b/spec/serializers/pipeline_serializer_spec.rb
@@ -4,7 +4,7 @@ describe PipelineSerializer do
   let(:user) { create(:user) }
 
   let(:serializer) do
-    described_class.new(user: user)
+    described_class.new(current_user: user)
   end
 
   subject { serializer.represent(resource) }
@@ -44,7 +44,7 @@ describe PipelineSerializer do
       end
 
       let(:serializer) do
-        described_class.new(user: user)
+        described_class.new(current_user: user)
           .with_pagination(request, response)
       end
 
@@ -113,7 +113,7 @@ describe PipelineSerializer do
 
       it "verifies number of queries" do
         recorded = ActiveRecord::QueryRecorder.new { subject }
-        expect(recorded.count).to be_within(1).of(50)
+        expect(recorded.count).to be_within(1).of(58)
         expect(recorded.cached_count).to eq(0)
       end
 
diff --git a/spec/serializers/stage_entity_spec.rb b/spec/serializers/stage_entity_spec.rb
index 0412b2d7741..64b3217b809 100644
--- a/spec/serializers/stage_entity_spec.rb
+++ b/spec/serializers/stage_entity_spec.rb
@@ -14,7 +14,7 @@ describe StageEntity do
   end
 
   before do
-    allow(request).to receive(:user).and_return(user)
+    allow(request).to receive(:current_user).and_return(user)
     create(:ci_build, :success, pipeline: pipeline)
   end
 
diff --git a/spec/services/ci/process_pipeline_service_spec.rb b/spec/services/ci/process_pipeline_service_spec.rb
index cf773866a6f..1d0a28210fb 100644
--- a/spec/services/ci/process_pipeline_service_spec.rb
+++ b/spec/services/ci/process_pipeline_service_spec.rb
@@ -268,6 +268,24 @@ describe Ci::ProcessPipelineService, '#execute', :services do
     end
   end
 
+  context 'when there are only manual actions in stages' do
+    before do
+      create_build('image', stage_idx: 0, when: 'manual', allow_failure: true)
+      create_build('build', stage_idx: 1, when: 'manual', allow_failure: true)
+      create_build('deploy', stage_idx: 2, when: 'manual')
+      create_build('check', stage_idx: 3)
+
+      process_pipeline
+    end
+
+    it 'processes all jobs until blocking actions encountered' do
+      expect(all_builds_statuses).to eq(%w[manual manual manual created])
+      expect(all_builds_names).to eq(%w[image build deploy check])
+
+      expect(pipeline.reload).to be_blocked
+    end
+  end
+
   context 'when blocking manual actions are defined' do
     before do
       create_build('code:test', stage_idx: 0)
@@ -441,6 +459,10 @@ describe Ci::ProcessPipelineService, '#execute', :services do
     builds.pluck(:name)
   end
 
+  def all_builds_names
+    all_builds.pluck(:name)
+  end
+
   def builds_statuses
     builds.pluck(:status)
   end
diff --git a/spec/support/prometheus_helpers.rb b/spec/support/prometheus_helpers.rb
index a204365431b..51987c7767d 100644
--- a/spec/support/prometheus_helpers.rb
+++ b/spec/support/prometheus_helpers.rb
@@ -7,17 +7,29 @@ module PrometheusHelpers
     %{sum(rate(container_cpu_usage_seconds_total{container_name!="POD",environment="#{environment_slug}"}[2m])) / count(container_cpu_usage_seconds_total{container_name!="POD",environment="#{environment_slug}"}) * 100}
   end
 
+  def prometheus_ping_url(prometheus_query)
+    query = { query: prometheus_query }.to_query
+
+    "https://prometheus.example.com/api/v1/query?#{query}"
+  end
+
   def prometheus_query_url(prometheus_query)
     query = { query: prometheus_query }.to_query
 
     "https://prometheus.example.com/api/v1/query?#{query}"
   end
 
-  def prometheus_query_range_url(prometheus_query, start: 8.hours.ago)
+  def prometheus_query_with_time_url(prometheus_query, time)
+    query = { query: prometheus_query, time: time.to_f }.to_query
+
+    "https://prometheus.example.com/api/v1/query?#{query}"
+  end
+
+  def prometheus_query_range_url(prometheus_query, start: 8.hours.ago, stop: Time.now.to_f)
     query = {
       query: prometheus_query,
       start: start.to_f,
-      end: Time.now.utc.to_f,
+      end: stop,
       step: 1.minute.to_i
     }.to_query
 
@@ -39,7 +51,12 @@ module PrometheusHelpers
 
   def stub_all_prometheus_requests(environment_slug, body: nil, status: 200)
     stub_prometheus_request(
-      prometheus_query_url(prometheus_memory_query(environment_slug)),
+      prometheus_query_with_time_url(prometheus_memory_query(environment_slug), Time.now.utc),
+      status: status,
+      body: body || prometheus_value_body
+    )
+    stub_prometheus_request(
+      prometheus_query_with_time_url(prometheus_memory_query(environment_slug), 8.hours.ago),
       status: status,
       body: body || prometheus_value_body
     )
@@ -49,7 +66,12 @@ module PrometheusHelpers
       body: body || prometheus_values_body
     )
     stub_prometheus_request(
-      prometheus_query_url(prometheus_cpu_query(environment_slug)),
+      prometheus_query_with_time_url(prometheus_cpu_query(environment_slug), Time.now.utc),
+      status: status,
+      body: body || prometheus_value_body
+    )
+    stub_prometheus_request(
+      prometheus_query_with_time_url(prometheus_cpu_query(environment_slug), 8.hours.ago),
       status: status,
       body: body || prometheus_value_body
     )
@@ -66,8 +88,10 @@ module PrometheusHelpers
       metrics: {
         memory_values: prometheus_values_body('matrix').dig(:data, :result),
         memory_current: prometheus_value_body('vector').dig(:data, :result),
+        memory_previous: prometheus_value_body('vector').dig(:data, :result),
         cpu_values: prometheus_values_body('matrix').dig(:data, :result),
-        cpu_current: prometheus_value_body('vector').dig(:data, :result)
+        cpu_current: prometheus_value_body('vector').dig(:data, :result),
+        cpu_previous: prometheus_value_body('vector').dig(:data, :result)
       },
       last_update: last_update
     }
diff --git a/spec/support/slack_mattermost_notifications_shared_examples.rb b/spec/support/slack_mattermost_notifications_shared_examples.rb
index b902fe90707..7e35ebb6c97 100644
--- a/spec/support/slack_mattermost_notifications_shared_examples.rb
+++ b/spec/support/slack_mattermost_notifications_shared_examples.rb
@@ -328,7 +328,7 @@ RSpec.shared_examples 'slack or mattermost notifications' do
     context 'only notify for the default branch' do
       context 'when enabled' do
         let(:pipeline) do
-          create(:ci_pipeline, project: project, status: 'failed', ref: 'not-the-default-branch')
+          create(:ci_pipeline, :failed, project: project, ref: 'not-the-default-branch')
         end
 
         before do
@@ -342,6 +342,18 @@ RSpec.shared_examples 'slack or mattermost notifications' do
           expect(result).to be_falsy
         end
       end
+
+      context 'when disabled' do
+        let(:pipeline) do
+          create(:ci_pipeline, :failed, project: project, ref: 'not-the-default-branch')
+        end
+
+        before do
+          chat_service.notify_only_default_branch = false
+        end
+
+        it_behaves_like 'call Slack/Mattermost API'
+      end
     end
   end
 end
diff --git a/spec/support/wait_for_requests.rb b/spec/support/wait_for_requests.rb
index 73da23391ee..a18c8e03aa6 100644
--- a/spec/support/wait_for_requests.rb
+++ b/spec/support/wait_for_requests.rb
@@ -1,20 +1,26 @@
 require_relative './wait_for_ajax'
+require_relative './wait_for_vue_resource'
 
 module WaitForRequests
   extend self
   include WaitForAjax
+  include WaitForVueResource
 
   # This is inspired by http://www.salsify.com/blog/engineering/tearing-capybara-ajax-tests
   def wait_for_requests_complete
     Gitlab::Testing::RequestBlockerMiddleware.block_requests!
     wait_for('pending AJAX requests complete') do
       Gitlab::Testing::RequestBlockerMiddleware.num_active_requests.zero? &&
-        finished_all_ajax_requests?
+        finished_all_requests?
     end
   ensure
     Gitlab::Testing::RequestBlockerMiddleware.allow_requests!
   end
 
+  def finished_all_requests?
+    finished_all_ajax_requests? && finished_all_vue_resource_requests?
+  end
+
   # Waits until the passed block returns true
   def wait_for(condition_name, max_wait_time: Capybara.default_max_wait_time, polling_interval: 0.01)
     wait_until = Time.now + max_wait_time.seconds
diff --git a/spec/support/wait_for_vue_resource.rb b/spec/support/wait_for_vue_resource.rb
index 4a4e2e16ee7..3bb3d9c2e51 100644
--- a/spec/support/wait_for_vue_resource.rb
+++ b/spec/support/wait_for_vue_resource.rb
@@ -1,7 +1,19 @@
 module WaitForVueResource
   def wait_for_vue_resource(spinner: true)
     Timeout.timeout(Capybara.default_max_wait_time) do
-      loop until page.evaluate_script('window.activeVueResources').zero?
+      loop until finished_all_vue_resource_requests?
     end
   end
+
+  private
+
+  def finished_all_vue_resource_requests?
+    return true unless javascript_test?
+
+    page.evaluate_script('window.activeVueResources || 0').zero?
+  end
+
+  def javascript_test?
+    Capybara.current_driver == Capybara.javascript_driver
+  end
 end