18 files changed, 530 insertions, 184 deletions

diff --git a/spec/models/ability_spec.rb b/spec/models/ability_spec.rb
index 853f6943cef..1bdf005c823 100644
--- a/spec/models/ability_spec.rb
+++ b/spec/models/ability_spec.rb
@@ -218,4 +218,17 @@ describe Ability, lib: true do
       end
     end
   end
+
+  describe '.project_disabled_features_rules' do
+    let(:project) { create(:project,  wiki_access_level: ProjectFeature::DISABLED) }
+
+    subject { described_class.allowed(project.owner, project) }
+
+    context 'wiki named abilities' do
+      it 'disables wiki abilities if the project has no wiki' do
+        expect(project).to receive(:has_external_wiki?).and_return(false)
+        expect(subject).not_to include(:read_wiki, :create_wiki, :update_wiki, :admin_wiki)
+      end
+    end
+  end
 end
diff --git a/spec/models/build_spec.rb b/spec/models/build_spec.rb
index ee2c3d04984..c45c2635cf4 100644
--- a/spec/models/build_spec.rb
+++ b/spec/models/build_spec.rb
@@ -948,15 +948,17 @@ describe Ci::Build, models: true do
       before { build.run! }
 
       it 'returns false' do
-        expect(build.retryable?).to be false
+        expect(build).not_to be_retryable
       end
     end
 
     context 'when build is finished' do
-      before { build.success! }
+      before do
+        build.success!
+      end
 
       it 'returns true' do
-        expect(build.retryable?).to be true
+        expect(build).to be_retryable
       end
     end
   end
diff --git a/spec/models/ci/build_spec.rb b/spec/models/ci/build_spec.rb
index 36d10636ae9..bce18b4e99e 100644
--- a/spec/models/ci/build_spec.rb
+++ b/spec/models/ci/build_spec.rb
@@ -19,4 +19,64 @@ describe Ci::Build, models: true do
       expect(build.trace).to eq(test_trace)
     end
   end
+
+  describe '#has_trace_file?' do
+    context 'when there is no trace' do
+      it { expect(build.has_trace_file?).to be_falsey }
+      it { expect(build.trace).to be_nil }
+    end
+
+    context 'when there is a trace' do
+      context 'when trace is stored in file' do
+        let(:build_with_trace) { create(:ci_build, :trace) }
+
+        it { expect(build_with_trace.has_trace_file?).to be_truthy }
+        it { expect(build_with_trace.trace).to eq('BUILD TRACE') }
+      end
+
+      context 'when trace is stored in old file' do
+        before do
+          allow(build.project).to receive(:ci_id).and_return(999)
+          allow(File).to receive(:exist?).with(build.path_to_trace).and_return(false)
+          allow(File).to receive(:exist?).with(build.old_path_to_trace).and_return(true)
+          allow(File).to receive(:read).with(build.old_path_to_trace).and_return(test_trace)
+        end
+
+        it { expect(build.has_trace_file?).to be_truthy }
+        it { expect(build.trace).to eq(test_trace) }
+      end
+
+      context 'when trace is stored in DB' do
+        before do
+          allow(build.project).to receive(:ci_id).and_return(nil)
+          allow(build).to receive(:read_attribute).with(:trace).and_return(test_trace)
+          allow(File).to receive(:exist?).with(build.path_to_trace).and_return(false)
+          allow(File).to receive(:exist?).with(build.old_path_to_trace).and_return(false)
+        end
+
+        it { expect(build.has_trace_file?).to be_falsey }
+        it { expect(build.trace).to eq(test_trace) }
+      end
+    end
+  end
+
+  describe '#trace_file_path' do
+    context 'when trace is stored in file' do
+      before do
+        allow(build).to receive(:has_trace_file?).and_return(true)
+        allow(build).to receive(:has_old_trace_file?).and_return(false)
+      end
+
+      it { expect(build.trace_file_path).to eq(build.path_to_trace) }
+    end
+
+    context 'when trace is stored in old file' do
+      before do
+        allow(build).to receive(:has_trace_file?).and_return(true)
+        allow(build).to receive(:has_old_trace_file?).and_return(true)
+      end
+
+      it { expect(build.trace_file_path).to eq(build.old_path_to_trace) }
+    end
+  end
 end
diff --git a/spec/models/ci/pipeline_spec.rb b/spec/models/ci/pipeline_spec.rb
index 721b20e0cb2..598df576001 100644
--- a/spec/models/ci/pipeline_spec.rb
+++ b/spec/models/ci/pipeline_spec.rb
@@ -195,6 +195,36 @@ describe Ci::Pipeline, models: true do
     end
   end
 
+  context 'with non-empty project' do
+    let(:project) { create(:project) }
+
+    let(:pipeline) do
+      create(:ci_pipeline,
+             project: project,
+             ref: project.default_branch,
+             sha: project.commit.sha)
+    end
+
+    describe '#latest?' do
+      context 'with latest sha' do
+        it 'returns true' do
+          expect(pipeline).to be_latest
+        end
+      end
+
+      context 'with not latest sha' do
+        before do
+          pipeline.update(
+            sha: project.commit("#{project.default_branch}~1").sha)
+        end
+
+        it 'returns false' do
+          expect(pipeline).not_to be_latest
+        end
+      end
+    end
+  end
+
   describe '#manual_actions' do
     subject { pipeline.manual_actions }
 
diff --git a/spec/models/commit_range_spec.rb b/spec/models/commit_range_spec.rb
index 384a38ebc69..c41359b55a3 100644
--- a/spec/models/commit_range_spec.rb
+++ b/spec/models/commit_range_spec.rb
@@ -76,16 +76,6 @@ describe CommitRange, models: true do
     end
   end
 
-  describe '#reference_title' do
-    it 'returns the correct String for three-dot ranges' do
-      expect(range.reference_title).to eq "Commits #{full_sha_from} through #{full_sha_to}"
-    end
-
-    it 'returns the correct String for two-dot ranges' do
-      expect(range2.reference_title).to eq "Commits #{full_sha_from}^ through #{full_sha_to}"
-    end
-  end
-
   describe '#to_param' do
     it 'includes the correct keys' do
       expect(range.to_param.keys).to eq %i(from to)
diff --git a/spec/models/concerns/awardable_spec.rb b/spec/models/concerns/awardable_spec.rb
index a371c4a18a9..de791abdf3d 100644
--- a/spec/models/concerns/awardable_spec.rb
+++ b/spec/models/concerns/awardable_spec.rb
@@ -45,4 +45,14 @@ describe Issue, "Awardable" do
       expect { issue.toggle_award_emoji("thumbsdown", award_emoji.user) }.to change { AwardEmoji.count }.by(-1)
     end
   end
+
+  describe 'querying award_emoji on an Awardable' do
+    let(:issue) { create(:issue) }
+
+    it 'sorts in ascending fashion' do
+      create_list(:award_emoji, 3, awardable: issue)
+
+      expect(issue.award_emoji).to eq issue.award_emoji.sort_by(&:id)
+    end
+  end
 end
diff --git a/spec/models/concerns/statuseable_spec.rb b/spec/models/concerns/has_status_spec.rb
index 8e0a2a2cbde..e118432d098 100644
--- a/spec/models/concerns/statuseable_spec.rb
+++ b/spec/models/concerns/has_status_spec.rb
@@ -1,9 +1,9 @@
 require 'spec_helper'
 
-describe Statuseable do
+describe HasStatus do
   before do
     @object = Object.new
-    @object.extend(Statuseable::ClassMethods)
+    @object.extend(HasStatus::ClassMethods)
   end
 
   describe '.status' do
@@ -12,7 +12,7 @@ describe Statuseable do
     end
 
     subject { @object.status }
-    
+
     shared_examples 'build status summary' do
       context 'all successful' do
         let(:statuses) { Array.new(2) { create(type, status: :success) } }
diff --git a/spec/models/concerns/project_features_compatibility_spec.rb b/spec/models/concerns/project_features_compatibility_spec.rb
new file mode 100644
index 00000000000..5363aea4d22
--- /dev/null
+++ b/spec/models/concerns/project_features_compatibility_spec.rb
@@ -0,0 +1,25 @@
+require 'spec_helper'
+
+describe ProjectFeaturesCompatibility do
+  let(:project) { create(:project) }
+  let(:features) { %w(issues wiki builds merge_requests snippets) }
+
+  # We had issues_enabled, snippets_enabled, builds_enabled, merge_requests_enabled and issues_enabled fields on projects table
+  # All those fields got moved to a new table called project_feature and are now integers instead of booleans
+  # This spec tests if the described concern makes sure parameters received by the API are correctly parsed to the new table
+  # So we can keep it compatible
+
+  it "converts fields from 'true' to ProjectFeature::ENABLED" do
+    features.each do |feature|
+      project.update_attribute("#{feature}_enabled".to_sym, "true")
+      expect(project.project_feature.public_send("#{feature}_access_level")).to eq(ProjectFeature::ENABLED)
+    end
+  end
+
+  it "converts fields from 'false' to ProjectFeature::DISABLED" do
+    features.each do |feature|
+      project.update_attribute("#{feature}_enabled".to_sym, "false")
+      expect(project.project_feature.public_send("#{feature}_access_level")).to eq(ProjectFeature::DISABLED)
+    end
+  end
+end
diff --git a/spec/models/members/project_member_spec.rb b/spec/models/members/project_member_spec.rb
index 913d74645a7..be57957b569 100644
--- a/spec/models/members/project_member_spec.rb
+++ b/spec/models/members/project_member_spec.rb
@@ -71,9 +71,6 @@ describe ProjectMember, models: true do
 
   describe :import_team do
     before do
-      @abilities = Six.new
-      @abilities << Ability
-
       @project_1 = create :project
       @project_2 = create :project
 
@@ -92,8 +89,8 @@ describe ProjectMember, models: true do
       it { expect(@project_2.users).to include(@user_1) }
       it { expect(@project_2.users).to include(@user_2) }
 
-      it { expect(@abilities.allowed?(@user_1, :create_project, @project_2)).to be_truthy }
-      it { expect(@abilities.allowed?(@user_2, :read_project, @project_2)).to be_truthy }
+      it { expect(Ability.allowed?(@user_1, :create_project, @project_2)).to be_truthy }
+      it { expect(Ability.allowed?(@user_2, :read_project, @project_2)).to be_truthy }
     end
 
     describe 'project 1 should not be changed' do
diff --git a/spec/models/merge_request_diff_spec.rb b/spec/models/merge_request_diff_spec.rb
index 29f7396f862..e5b185dc3f6 100644
--- a/spec/models/merge_request_diff_spec.rb
+++ b/spec/models/merge_request_diff_spec.rb
@@ -1,6 +1,27 @@
 require 'spec_helper'
 
 describe MergeRequestDiff, models: true do
+  describe 'create new record' do
+    subject { create(:merge_request).merge_request_diff }
+
+    it { expect(subject).to be_valid }
+    it { expect(subject).to be_persisted }
+    it { expect(subject.commits.count).to eq(5) }
+    it { expect(subject.diffs.count).to eq(8) }
+    it { expect(subject.head_commit_sha).to eq('5937ac0a7beb003549fc5fd26fc247adbce4a52e') }
+    it { expect(subject.base_commit_sha).to eq('ae73cb07c9eeaf35924a10f713b364d32b2dd34f') }
+    it { expect(subject.start_commit_sha).to eq('0b4bc9a49b562e85de7cc9e834518ea6828729b9') }
+  end
+
+  describe '#latest' do
+    let!(:mr) { create(:merge_request, :with_diffs) }
+    let!(:first_diff) { mr.merge_request_diff }
+    let!(:last_diff) { mr.create_merge_request_diff }
+
+    it { expect(last_diff.latest?).to be_truthy }
+    it { expect(first_diff.latest?).to be_falsey }
+  end
+
   describe '#diffs' do
     let(:mr) { create(:merge_request, :with_diffs) }
     let(:mr_diff) { mr.merge_request_diff }
diff --git a/spec/models/merge_request_spec.rb b/spec/models/merge_request_spec.rb
index 64c56d922ff..5bf3b8e609e 100644
--- a/spec/models/merge_request_spec.rb
+++ b/spec/models/merge_request_spec.rb
@@ -9,7 +9,7 @@ describe MergeRequest, models: true do
     it { is_expected.to belong_to(:target_project).with_foreign_key(:target_project_id).class_name('Project') }
     it { is_expected.to belong_to(:source_project).with_foreign_key(:source_project_id).class_name('Project') }
     it { is_expected.to belong_to(:merge_user).class_name("User") }
-    it { is_expected.to have_one(:merge_request_diff).dependent(:destroy) }
+    it { is_expected.to have_many(:merge_request_diffs).dependent(:destroy) }
   end
 
   describe 'modules' do
@@ -159,7 +159,7 @@ describe MergeRequest, models: true do
 
     context 'when there are MR diffs' do
       it 'delegates to the MR diffs' do
-        merge_request.merge_request_diff = MergeRequestDiff.new
+        merge_request.save
 
         expect(merge_request.merge_request_diff).to receive(:raw_diffs).with(hash_including(options))
 
@@ -316,7 +316,7 @@ describe MergeRequest, models: true do
     end
 
     it "can be removed if the last commit is the head of the source branch" do
-      allow(subject.source_project).to receive(:commit).and_return(subject.diff_head_commit)
+      allow(subject).to receive(:source_branch_head).and_return(subject.diff_head_commit)
 
       expect(subject.can_remove_source_branch?(user)).to be_truthy
     end
@@ -477,8 +477,8 @@ describe MergeRequest, models: true do
 
         allow(subject).to receive(:diff_head_sha).and_return('123abc')
 
-        expect(subject.source_project).to receive(:pipeline).
-          with('123abc', 'master').
+        expect(subject.source_project).to receive(:pipeline_for).
+          with('master', '123abc').
           and_return(pipeline)
 
         expect(subject.pipeline).to eq(pipeline)
@@ -721,12 +721,15 @@ describe MergeRequest, models: true do
 
     let(:commit) { subject.project.commit(sample_commit.id) }
 
-    it "reloads the diff content" do
-      expect(subject.merge_request_diff).to receive(:reload_content)
-
+    it "does not change existing merge request diff" do
+      expect(subject.merge_request_diff).not_to receive(:save_git_content)
       subject.reload_diff
     end
 
+    it "creates new merge request diff" do
+      expect { subject.reload_diff }.to change { subject.merge_request_diffs.count }.by(1)
+    end
+
     it "executs diff cache service" do
       expect_any_instance_of(MergeRequests::MergeRequestDiffCacheService).to receive(:execute).with(subject)
 
@@ -736,13 +739,15 @@ describe MergeRequest, models: true do
     it "updates diff note positions" do
       old_diff_refs = subject.diff_refs
 
-      merge_request_diff = subject.merge_request_diff
-
       # Update merge_request_diff so that #diff_refs will return commit.diff_refs
-      allow(merge_request_diff).to receive(:reload_content) do
-        merge_request_diff.base_commit_sha = commit.parent_id
-        merge_request_diff.start_commit_sha = commit.parent_id
-        merge_request_diff.head_commit_sha = commit.sha
+      allow(subject).to receive(:create_merge_request_diff) do
+        subject.merge_request_diffs.create(
+          base_commit_sha: commit.parent_id,
+          start_commit_sha: commit.parent_id,
+          head_commit_sha: commit.sha
+        )
+
+        subject.merge_request_diff(true)
       end
 
       expect(Notes::DiffPositionUpdateService).to receive(:new).with(
@@ -752,14 +757,31 @@ describe MergeRequest, models: true do
         new_diff_refs: commit.diff_refs,
         paths: note.position.paths
       ).and_call_original
-      expect_any_instance_of(Notes::DiffPositionUpdateService).to receive(:execute).with(note)
 
+      expect_any_instance_of(Notes::DiffPositionUpdateService).to receive(:execute).with(note)
       expect_any_instance_of(DiffNote).to receive(:save).once
 
       subject.reload_diff
     end
   end
 
+  describe '#branch_merge_base_commit' do
+    context 'source and target branch exist' do
+      it { expect(subject.branch_merge_base_commit.sha).to eq('ae73cb07c9eeaf35924a10f713b364d32b2dd34f') }
+      it { expect(subject.branch_merge_base_commit).to be_a(Commit) }
+    end
+
+    context 'when the target branch does not exist' do
+      before do
+        subject.project.repository.raw_repository.delete_branch(subject.target_branch)
+      end
+
+      it 'returns nil' do
+        expect(subject.branch_merge_base_commit).to be_nil
+      end
+    end
+  end
+
   describe "#diff_sha_refs" do
     context "with diffs" do
       subject { create(:merge_request, :with_diffs) }
@@ -890,6 +912,19 @@ describe MergeRequest, models: true do
       expect(merge_request.conflicts_can_be_resolved_in_ui?).to be_falsey
     end
 
+    it 'returns a falsey value when the MR is marked as having conflicts, but has none' do
+      merge_request = create_merge_request('master')
+
+      expect(merge_request.conflicts_can_be_resolved_in_ui?).to be_falsey
+    end
+
+    it 'returns a falsey value when the MR has a missing ref after a force push' do
+      merge_request = create_merge_request('conflict-resolvable')
+      allow(merge_request.conflicts).to receive(:merge_index).and_raise(Rugged::OdbError)
+
+      expect(merge_request.conflicts_can_be_resolved_in_ui?).to be_falsey
+    end
+
     it 'returns a falsey value when the MR does not support new diff notes' do
       merge_request = create_merge_request('conflict-resolvable')
       merge_request.merge_request_diff.update_attributes(start_commit_sha: nil)
@@ -927,4 +962,80 @@ describe MergeRequest, models: true do
       expect(merge_request.conflicts_can_be_resolved_in_ui?).to be_truthy
     end
   end
+
+  describe "#forked_source_project_missing?" do
+    let(:project)      { create(:project) }
+    let(:fork_project) { create(:project, forked_from_project: project) }
+    let(:user)         { create(:user) }
+    let(:unlink_project) { Projects::UnlinkForkService.new(fork_project, user) }
+
+    context "when the fork exists" do
+      let(:merge_request) do
+        create(:merge_request,
+          source_project: fork_project,
+          target_project: project)
+      end
+
+      it { expect(merge_request.forked_source_project_missing?).to be_falsey }
+    end
+
+    context "when the source project is the same as the target project" do
+      let(:merge_request) { create(:merge_request, source_project: project) }
+
+      it { expect(merge_request.forked_source_project_missing?).to be_falsey }
+    end
+
+    context "when the fork does not exist" do
+      let(:merge_request) do
+        create(:merge_request,
+          source_project: fork_project,
+          target_project: project)
+      end
+
+      it "returns true" do
+        unlink_project.execute
+        merge_request.reload
+
+        expect(merge_request.forked_source_project_missing?).to be_truthy
+      end
+    end
+  end
+
+  describe "#closed_without_fork?" do
+    let(:project)      { create(:project) }
+    let(:fork_project) { create(:project, forked_from_project: project) }
+    let(:user)         { create(:user) }
+    let(:unlink_project) { Projects::UnlinkForkService.new(fork_project, user) }
+
+    context "when the merge request is closed" do
+      let(:closed_merge_request) do
+        create(:closed_merge_request,
+          source_project: fork_project,
+          target_project: project)
+      end
+
+      it "returns false if the fork exist" do
+        expect(closed_merge_request.closed_without_fork?).to be_falsey
+      end
+
+      it "returns true if the fork does not exist" do
+        unlink_project.execute
+        closed_merge_request.reload
+
+        expect(closed_merge_request.closed_without_fork?).to be_truthy
+      end
+    end
+
+    context "when the merge request is open" do
+      let(:open_merge_request) do
+        create(:merge_request,
+          source_project: fork_project,
+          target_project: project)
+      end
+
+      it "returns false" do
+        expect(open_merge_request.closed_without_fork?).to be_falsey
+      end
+    end
+  end
 end
diff --git a/spec/models/network/graph_spec.rb b/spec/models/network/graph_spec.rb
new file mode 100644
index 00000000000..b76513d2a3c
--- /dev/null
+++ b/spec/models/network/graph_spec.rb
@@ -0,0 +1,12 @@
+require 'spec_helper'
+
+describe Network::Graph, models: true do
+  let(:project) { create(:project) }
+  let!(:note_on_commit) { create(:note_on_commit, project: project) }
+
+  it '#initialize' do
+    graph = described_class.new(project, 'refs/heads/master', project.repository.commit, nil)
+
+    expect(graph.notes).to eq( { note_on_commit.commit_id => 1 } )
+  end
+end
diff --git a/spec/models/note_spec.rb b/spec/models/note_spec.rb
index ef2747046b9..e6b6e7c0634 100644
--- a/spec/models/note_spec.rb
+++ b/spec/models/note_spec.rb
@@ -85,8 +85,6 @@ describe Note, models: true do
       @u1 = create(:user)
       @u2 = create(:user)
       @u3 = create(:user)
-      @abilities = Six.new
-      @abilities << Ability
     end
 
     describe 'read' do
@@ -95,9 +93,9 @@ describe Note, models: true do
         @p2.project_members.create(user: @u3, access_level: ProjectMember::GUEST)
       end
 
-      it { expect(@abilities.allowed?(@u1, :read_note, @p1)).to be_falsey }
-      it { expect(@abilities.allowed?(@u2, :read_note, @p1)).to be_truthy }
-      it { expect(@abilities.allowed?(@u3, :read_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u1, :read_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u2, :read_note, @p1)).to be_truthy }
+      it { expect(Ability.allowed?(@u3, :read_note, @p1)).to be_falsey }
     end
 
     describe 'write' do
@@ -106,9 +104,9 @@ describe Note, models: true do
         @p2.project_members.create(user: @u3, access_level: ProjectMember::DEVELOPER)
       end
 
-      it { expect(@abilities.allowed?(@u1, :create_note, @p1)).to be_falsey }
-      it { expect(@abilities.allowed?(@u2, :create_note, @p1)).to be_truthy }
-      it { expect(@abilities.allowed?(@u3, :create_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u1, :create_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u2, :create_note, @p1)).to be_truthy }
+      it { expect(Ability.allowed?(@u3, :create_note, @p1)).to be_falsey }
     end
 
     describe 'admin' do
@@ -118,9 +116,9 @@ describe Note, models: true do
         @p2.project_members.create(user: @u3, access_level: ProjectMember::MASTER)
       end
 
-      it { expect(@abilities.allowed?(@u1, :admin_note, @p1)).to be_falsey }
-      it { expect(@abilities.allowed?(@u2, :admin_note, @p1)).to be_truthy }
-      it { expect(@abilities.allowed?(@u3, :admin_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u1, :admin_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u2, :admin_note, @p1)).to be_truthy }
+      it { expect(Ability.allowed?(@u3, :admin_note, @p1)).to be_falsey }
     end
   end
 
@@ -225,7 +223,7 @@ describe Note, models: true do
     let(:note) do
       create :note,
         noteable: ext_issue, project: ext_proj,
-        note: "mentioned in issue #{private_issue.to_reference(ext_proj)}",
+        note: "Mentioned in issue #{private_issue.to_reference(ext_proj)}",
         system: true
     end
 
diff --git a/spec/models/project_feature_spec.rb b/spec/models/project_feature_spec.rb
new file mode 100644
index 00000000000..8d554a01be5
--- /dev/null
+++ b/spec/models/project_feature_spec.rb
@@ -0,0 +1,91 @@
+require 'spec_helper'
+
+describe ProjectFeature do
+  let(:project) { create(:project) }
+  let(:user) { create(:user) }
+
+  describe '#feature_available?' do
+    let(:features) { %w(issues wiki builds merge_requests snippets) }
+
+    context 'when features are disabled' do
+      it "returns false" do
+        features.each do |feature|
+          project.project_feature.update_attribute("#{feature}_access_level".to_sym, ProjectFeature::DISABLED)
+          expect(project.feature_available?(:issues, user)).to eq(false)
+        end
+      end
+    end
+
+    context 'when features are enabled only for team members' do
+      it "returns false when user is not a team member" do
+        features.each do |feature|
+          project.project_feature.update_attribute("#{feature}_access_level".to_sym, ProjectFeature::PRIVATE)
+          expect(project.feature_available?(:issues, user)).to eq(false)
+        end
+      end
+
+      it "returns true when user is a team member" do
+        project.team << [user, :developer]
+
+        features.each do |feature|
+          project.project_feature.update_attribute("#{feature}_access_level".to_sym, ProjectFeature::PRIVATE)
+          expect(project.feature_available?(:issues, user)).to eq(true)
+        end
+      end
+
+      it "returns true when user is a member of project group" do
+        group = create(:group)
+        project = create(:project, namespace: group)
+        group.add_developer(user)
+
+        features.each do |feature|
+          project.project_feature.update_attribute("#{feature}_access_level".to_sym, ProjectFeature::PRIVATE)
+          expect(project.feature_available?(:issues, user)).to eq(true)
+        end
+      end
+
+      it "returns true if user is an admin" do
+        user.update_attribute(:admin, true)
+
+        features.each do |feature|
+          project.project_feature.update_attribute("#{feature}_access_level".to_sym, ProjectFeature::PRIVATE)
+          expect(project.feature_available?(:issues, user)).to eq(true)
+        end
+      end
+    end
+
+    context 'when feature is enabled for everyone' do
+      it "returns true" do
+        features.each do |feature|
+          project.project_feature.update_attribute("#{feature}_access_level".to_sym, ProjectFeature::ENABLED)
+          expect(project.feature_available?(:issues, user)).to eq(true)
+        end
+      end
+    end
+  end
+
+  describe '#*_enabled?' do
+    let(:features) { %w(wiki builds merge_requests) }
+
+    it "returns false when feature is disabled" do
+      features.each do |feature|
+        project.project_feature.update_attribute("#{feature}_access_level".to_sym, ProjectFeature::DISABLED)
+        expect(project.public_send("#{feature}_enabled?")).to eq(false)
+      end
+    end
+
+    it "returns true when feature is enabled only for team members" do
+      features.each do |feature|
+        project.project_feature.update_attribute("#{feature}_access_level".to_sym, ProjectFeature::PRIVATE)
+        expect(project.public_send("#{feature}_enabled?")).to eq(true)
+      end
+    end
+
+    it "returns true when feature is enabled for everyone" do
+      features.each do |feature|
+        project.project_feature.update_attribute("#{feature}_access_level".to_sym, ProjectFeature::ENABLED)
+        expect(project.public_send("#{feature}_enabled?")).to eq(true)
+      end
+    end
+  end
+end
diff --git a/spec/models/project_security_spec.rb b/spec/models/project_security_spec.rb
deleted file mode 100644
index 36379074ea0..00000000000
--- a/spec/models/project_security_spec.rb
+++ /dev/null
@@ -1,112 +0,0 @@
-require 'spec_helper'
-
-describe Project, models: true do
-  describe 'authorization' do
-    before do
-      @p1 = create(:project)
-
-      @u1 = create(:user)
-      @u2 = create(:user)
-      @u3 = create(:user)
-      @u4 = @p1.owner
-
-      @abilities = Six.new
-      @abilities << Ability
-    end
-
-    let(:guest_actions) { Ability.project_guest_rules }
-    let(:report_actions) { Ability.project_report_rules }
-    let(:dev_actions) { Ability.project_dev_rules }
-    let(:master_actions) { Ability.project_master_rules }
-    let(:owner_actions) { Ability.project_owner_rules }
-
-    describe "Non member rules" do
-      it "denies for non-project users any actions" do
-        owner_actions.each do |action|
-          expect(@abilities.allowed?(@u1, action, @p1)).to be_falsey
-        end
-      end
-    end
-
-    describe "Guest Rules" do
-      before do
-        @p1.project_members.create(project: @p1, user: @u2, access_level: ProjectMember::GUEST)
-      end
-
-      it "allows for project user any guest actions" do
-        guest_actions.each do |action|
-          expect(@abilities.allowed?(@u2, action, @p1)).to be_truthy
-        end
-      end
-    end
-
-    describe "Report Rules" do
-      before do
-        @p1.project_members.create(project: @p1, user: @u2, access_level: ProjectMember::REPORTER)
-      end
-
-      it "allows for project user any report actions" do
-        report_actions.each do |action|
-          expect(@abilities.allowed?(@u2, action, @p1)).to be_truthy
-        end
-      end
-    end
-
-    describe "Developer Rules" do
-      before do
-        @p1.project_members.create(project: @p1, user: @u2, access_level: ProjectMember::REPORTER)
-        @p1.project_members.create(project: @p1, user: @u3, access_level: ProjectMember::DEVELOPER)
-      end
-
-      it "denies for developer master-specific actions" do
-        [dev_actions - report_actions].each do |action|
-          expect(@abilities.allowed?(@u2, action, @p1)).to be_falsey
-        end
-      end
-
-      it "allows for project user any dev actions" do
-        dev_actions.each do |action|
-          expect(@abilities.allowed?(@u3, action, @p1)).to be_truthy
-        end
-      end
-    end
-
-    describe "Master Rules" do
-      before do
-        @p1.project_members.create(project: @p1, user: @u2, access_level: ProjectMember::DEVELOPER)
-        @p1.project_members.create(project: @p1, user: @u3, access_level: ProjectMember::MASTER)
-      end
-
-      it "denies for developer master-specific actions" do
-        [master_actions - dev_actions].each do |action|
-          expect(@abilities.allowed?(@u2, action, @p1)).to be_falsey
-        end
-      end
-
-      it "allows for project user any master actions" do
-        master_actions.each do |action|
-          expect(@abilities.allowed?(@u3, action, @p1)).to be_truthy
-        end
-      end
-    end
-
-    describe "Owner Rules" do
-      before do
-        @p1.project_members.create(project: @p1, user: @u2, access_level: ProjectMember::DEVELOPER)
-        @p1.project_members.create(project: @p1, user: @u3, access_level: ProjectMember::MASTER)
-      end
-
-      it "denies for masters admin-specific actions" do
-        [owner_actions - master_actions].each do |action|
-          expect(@abilities.allowed?(@u2, action, @p1)).to be_falsey
-        end
-      end
-
-      it "allows for project owner any admin actions" do
-        owner_actions.each do |action|
-          expect(@abilities.allowed?(@u4, action, @p1)).to be_truthy
-        end
-      end
-    end
-  end
-end
diff --git a/spec/models/project_spec.rb b/spec/models/project_spec.rb
index d1f3a815290..4a41fafb84d 100644
--- a/spec/models/project_spec.rb
+++ b/spec/models/project_spec.rb
@@ -247,7 +247,7 @@ describe Project, models: true do
     end
   end
 
-  describe "#new_issue_address" do
+  xdescribe "#new_issue_address" do
     let(:project) { create(:empty_project, path: "somewhere") }
     let(:user) { create(:user) }
 
@@ -506,6 +506,18 @@ describe Project, models: true do
     end
   end
 
+  describe '#has_wiki?' do
+    let(:no_wiki_project) { build(:project, wiki_enabled: false, has_external_wiki: false) }
+    let(:wiki_enabled_project) { build(:project) }
+    let(:external_wiki_project) { build(:project, has_external_wiki: true) }
+
+    it 'returns true if project is wiki enabled or has external wiki' do
+      expect(wiki_enabled_project).to have_wiki
+      expect(external_wiki_project).to have_wiki
+      expect(no_wiki_project).not_to have_wiki
+    end
+  end
+
   describe '#external_wiki' do
     let(:project) { create(:project) }
 
@@ -685,31 +697,43 @@ describe Project, models: true do
     end
   end
 
-  describe '#pipeline' do
-    let(:project) { create :project }
-    let(:pipeline) { create :ci_pipeline, project: project, ref: 'master' }
-
-    subject { project.pipeline(pipeline.sha, 'master') }
+  describe '#pipeline_for' do
+    let(:project) { create(:project) }
+    let!(:pipeline) { create_pipeline }
 
-    it { is_expected.to eq(pipeline) }
+    shared_examples 'giving the correct pipeline' do
+      it { is_expected.to eq(pipeline) }
 
-    context 'return latest' do
-      let(:pipeline2) { create :ci_pipeline, project: project, ref: 'master' }
+      context 'return latest' do
+        let!(:pipeline2) { create_pipeline }
 
-      before do
-        pipeline
-        pipeline2
+        it { is_expected.to eq(pipeline2) }
       end
+    end
+
+    context 'with explicit sha' do
+      subject { project.pipeline_for('master', pipeline.sha) }
+
+      it_behaves_like 'giving the correct pipeline'
+    end
+
+    context 'with implicit sha' do
+      subject { project.pipeline_for('master') }
+
+      it_behaves_like 'giving the correct pipeline'
+    end
 
-      it { is_expected.to eq(pipeline2) }
+    def create_pipeline
+      create(:ci_pipeline,
+             project: project,
+             ref: 'master',
+             sha: project.commit('master').sha)
     end
   end
 
   describe '#builds_enabled' do
     let(:project) { create :project }
 
-    before { project.builds_enabled = true }
-
     subject { project.builds_enabled }
 
     it { expect(project.builds_enabled?).to be_truthy }
@@ -1442,4 +1466,35 @@ describe Project, models: true do
       expect(shared_project.authorized_for_user?(master, Gitlab::Access::MASTER)).to be(true)
     end
   end
+
+  describe 'change_head' do
+    let(:project) { create(:project) }
+
+    it 'calls the before_change_head method' do
+      expect(project.repository).to receive(:before_change_head)
+      project.change_head(project.default_branch)
+    end
+
+    it 'creates the new reference with rugged' do
+      expect(project.repository.rugged.references).to receive(:create).with('HEAD',
+                                                                            "refs/heads/#{project.default_branch}",
+                                                                            force: true)
+      project.change_head(project.default_branch)
+    end
+
+    it 'copies the gitattributes' do
+      expect(project.repository).to receive(:copy_gitattributes).with(project.default_branch)
+      project.change_head(project.default_branch)
+    end
+
+    it 'expires the avatar cache' do
+      expect(project.repository).to receive(:expire_avatar_cache).with(project.default_branch)
+      project.change_head(project.default_branch)
+    end
+
+    it 'reloads the default branch' do
+      expect(project).to receive(:reload_default_branch)
+      project.change_head(project.default_branch)
+    end
+  end
 end
diff --git a/spec/models/repository_spec.rb b/spec/models/repository_spec.rb
index 1fea50ad42c..afc7dc5db81 100644
--- a/spec/models/repository_spec.rb
+++ b/spec/models/repository_spec.rb
@@ -382,6 +382,24 @@ describe Repository, models: true do
     end
   end
 
+  describe '#find_branch' do
+    it 'loads a branch with a fresh repo' do
+      expect(Gitlab::Git::Repository).to receive(:new).twice.and_call_original
+
+      2.times do
+        expect(repository.find_branch('feature')).not_to be_nil
+      end
+    end
+
+    it 'loads a branch with a cached repo' do
+      expect(Gitlab::Git::Repository).to receive(:new).once.and_call_original
+
+      2.times do
+        expect(repository.find_branch('feature', fresh_repo: false)).not_to be_nil
+      end
+    end
+  end
+
   describe '#rm_branch' do
     let(:old_rev) { '0b4bc9a49b562e85de7cc9e834518ea6828729b9' } # git rev-parse feature
     let(:blank_sha) { '0000000000000000000000000000000000000000' }
@@ -425,31 +443,32 @@ describe Repository, models: true do
 
   describe '#commit_with_hooks' do
     let(:old_rev) { '0b4bc9a49b562e85de7cc9e834518ea6828729b9' } # git rev-parse feature
+    let(:new_rev) { 'a74ae73c1ccde9b974a70e82b901588071dc142a' } # commit whose parent is old_rev
 
     context 'when pre hooks were successful' do
       before do
         expect_any_instance_of(GitHooksService).to receive(:execute).
-          with(user, repository.path_to_repo, old_rev, sample_commit.id, 'refs/heads/feature').
+          with(user, repository.path_to_repo, old_rev, new_rev, 'refs/heads/feature').
           and_yield.and_return(true)
       end
 
       it 'runs without errors' do
         expect do
-          repository.commit_with_hooks(user, 'feature') { sample_commit.id }
+          repository.commit_with_hooks(user, 'feature') { new_rev }
         end.not_to raise_error
       end
 
       it 'ensures the autocrlf Git option is set to :input' do
         expect(repository).to receive(:update_autocrlf_option)
 
-        repository.commit_with_hooks(user, 'feature') { sample_commit.id }
+        repository.commit_with_hooks(user, 'feature') { new_rev }
       end
 
       context "when the branch wasn't empty" do
         it 'updates the head' do
           expect(repository.find_branch('feature').target.id).to eq(old_rev)
-          repository.commit_with_hooks(user, 'feature') { sample_commit.id }
-          expect(repository.find_branch('feature').target.id).to eq(sample_commit.id)
+          repository.commit_with_hooks(user, 'feature') { new_rev }
+          expect(repository.find_branch('feature').target.id).to eq(new_rev)
         end
       end
     end
@@ -459,7 +478,7 @@ describe Repository, models: true do
         allow_any_instance_of(Gitlab::Git::Hook).to receive(:trigger).and_return([false, ''])
 
         expect do
-          repository.commit_with_hooks(user, 'feature') { sample_commit.id }
+          repository.commit_with_hooks(user, 'feature') { new_rev }
         end.to raise_error(GitHooksService::PreReceiveError)
       end
     end
@@ -467,6 +486,7 @@ describe Repository, models: true do
     context 'when target branch is different from source branch' do
       before do
         allow_any_instance_of(Gitlab::Git::Hook).to receive(:trigger).and_return([true, ''])
+        allow(repository).to receive(:update_ref!)
       end
 
       it 'expires branch cache' do
@@ -477,7 +497,7 @@ describe Repository, models: true do
         expect(repository).to     receive(:expire_has_visible_content_cache)
         expect(repository).to     receive(:expire_branch_count_cache)
 
-        repository.commit_with_hooks(user, 'new-feature') { sample_commit.id }
+        repository.commit_with_hooks(user, 'new-feature') { new_rev }
       end
     end
 
@@ -1250,4 +1270,18 @@ describe Repository, models: true do
       File.delete(path)
     end
   end
+
+  describe '#update_ref!' do
+    it 'can create a ref' do
+      repository.update_ref!('refs/heads/foobar', 'refs/heads/master', Gitlab::Git::BLANK_SHA)
+
+      expect(repository.find_branch('foobar')).not_to be_nil
+    end
+
+    it 'raises CommitError when the ref update fails' do
+      expect do
+        repository.update_ref!('refs/heads/master', 'refs/heads/master', Gitlab::Git::BLANK_SHA)
+      end.to raise_error(Repository::CommitError)
+    end
+  end
 end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 51e4780e2b1..a1770d96f83 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -920,6 +920,16 @@ describe User, models: true do
 
       expect(subject.recent_push).to eq(nil)
     end
+
+    it "includes push events on any of the provided projects" do
+      expect(subject.recent_push(project1)).to eq(nil)
+      expect(subject.recent_push(project2)).to eq(push_event)
+
+      push_data1 = Gitlab::DataBuilder::Push.build_sample(project1, subject)
+      push_event1 = create(:event, action: Event::PUSHED, project: project1, target: project1, author: subject, data: push_data1)
+
+      expect(subject.recent_push([project1, project2])).to eq(push_event1) # Newest
+    end
   end
 
   describe '#authorized_groups' do
@@ -996,8 +1006,7 @@ describe User, models: true do
     end
 
     it 'does not include projects for which issues are disabled' do
-      project = create(:project)
-      project.update_attributes(issues_enabled: false)
+      project = create(:project, issues_access_level: ProjectFeature::DISABLED)
 
       expect(user.projects_where_can_admin_issues.to_a).to be_empty
       expect(user.can?(:admin_issue, project)).to eq(false)