Merge branch 'master' into 'refactor-snippets-finder'refactor-snippets-finder

# Conflicts:
#   spec/models/project_spec.rb

1 files changed, 83 insertions, 0 deletions

diff --git a/spec/javascripts/vue_shared/components/smart_virtual_list_spec.js b/spec/javascripts/vue_shared/components/smart_virtual_list_spec.js
new file mode 100644
index 00000000000..e723fead65e
--- /dev/null
+++ b/spec/javascripts/vue_shared/components/smart_virtual_list_spec.js
@@ -0,0 +1,83 @@
+import Vue from 'vue';
+import SmartVirtualScrollList from '~/vue_shared/components/smart_virtual_list.vue';
+import mountComponent from 'spec/helpers/vue_mount_component_helper';
+
+describe('Toggle Button', () => {
+  let vm;
+
+  const createComponent = ({ length, remain }) => {
+    const smartListProperties = {
+      rtag: 'section',
+      wtag: 'ul',
+      wclass: 'test-class',
+      // Size in pixels does not matter for our tests here
+      size: 35,
+      length,
+      remain,
+    };
+
+    const Component = Vue.extend({
+      components: {
+        SmartVirtualScrollList,
+      },
+      smartListProperties,
+      items: Array(length).fill(1),
+      template: `
+      <smart-virtual-scroll-list v-bind="$options.smartListProperties">
+        <li v-for="(val, key) in $options.items" :key="key">{{ key + 1 }}</li>
+      </smart-virtual-scroll-list>`,
+    });
+
+    return mountComponent(Component);
+  };
+
+  afterEach(() => {
+    vm.$destroy();
+  });
+
+  describe('if the list is shorter than the maximum shown elements', () => {
+    const listLength = 10;
+
+    beforeEach(() => {
+      vm = createComponent({ length: listLength, remain: 20 });
+    });
+
+    it('renders without the vue-virtual-scroll-list component', () => {
+      expect(vm.$el.classList).not.toContain('js-virtual-list');
+      expect(vm.$el.classList).toContain('js-plain-element');
+    });
+
+    it('renders list with provided tags and classes for the wrapper elements', () => {
+      expect(vm.$el.tagName).toEqual('SECTION');
+      expect(vm.$el.firstChild.tagName).toEqual('UL');
+      expect(vm.$el.firstChild.classList).toContain('test-class');
+    });
+
+    it('renders all children list elements', () => {
+      expect(vm.$el.querySelectorAll('li').length).toEqual(listLength);
+    });
+  });
+
+  describe('if the list is longer than the maximum shown elements', () => {
+    const maxItemsShown = 20;
+
+    beforeEach(() => {
+      vm = createComponent({ length: 1000, remain: maxItemsShown });
+    });
+
+    it('uses the vue-virtual-scroll-list component', () => {
+      expect(vm.$el.classList).toContain('js-virtual-list');
+      expect(vm.$el.classList).not.toContain('js-plain-element');
+    });
+
+    it('renders list with provided tags and classes for the wrapper elements', () => {
+      expect(vm.$el.tagName).toEqual('SECTION');
+      expect(vm.$el.firstChild.tagName).toEqual('UL');
+      expect(vm.$el.firstChild.classList).toContain('test-class');
+    });
+
+    it('renders at max twice the maximum shown elements', () => {
+      expect(vm.$el.querySelectorAll('li').length).toBeLessThanOrEqual(2 * maxItemsShown);
+    });
+  });
+});