1 files changed, 113 insertions, 0 deletions
diff --git a/spec/frontend/diffs/components/diff_gutter_avatars_spec.js b/spec/frontend/diffs/components/diff_gutter_avatars_spec.js
new file mode 100644
index 00000000000..48ee5c63f35
--- /dev/null
+++ b/spec/frontend/diffs/components/diff_gutter_avatars_spec.js
@@ -0,0 +1,113 @@
+import { shallowMount, createLocalVue } from '@vue/test-utils';
+import DiffGutterAvatars from '~/diffs/components/diff_gutter_avatars.vue';
+import discussionsMockData from '../mock_data/diff_discussions';
+
+const localVue = createLocalVue();
+const getDiscussionsMockData = () => [Object.assign({}, discussionsMockData)];
+
+describe('DiffGutterAvatars', () => {
+  let wrapper;
+
+  const findCollapseButton = () => wrapper.find('.diff-notes-collapse');
+  const findMoreCount = () => wrapper.find('.diff-comments-more-count');
+  const findUserAvatars = () => wrapper.findAll('.diff-comment-avatar');
+
+  const createComponent = (props = {}) => {
+    wrapper = shallowMount(DiffGutterAvatars, {
+      localVue,
+      sync: false,
+      propsData: {
+        ...props,
+      },
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('when expanded', () => {
+    beforeEach(() => {
+      createComponent({
+        discussions: getDiscussionsMockData(),
+        discussionsExpanded: true,
+      });
+    });
+
+    it('renders a collapse button when discussions are expanded', () => {
+      expect(findCollapseButton().exists()).toBe(true);
+    });
+
+    it('should emit toggleDiscussions event on button click', () => {
+      findCollapseButton().trigger('click');
+
+      expect(wrapper.emitted().toggleLineDiscussions).toBeTruthy();
+    });
+  });
+
+  describe('when collapsed', () => {
+    beforeEach(() => {
+      createComponent({
+        discussions: getDiscussionsMockData(),
+        discussionsExpanded: false,
+      });
+    });
+
+    it('renders user avatars and moreCount text', () => {
+      expect(findUserAvatars().exists()).toBe(true);
+      expect(findMoreCount().exists()).toBe(true);
+    });
+
+    it('renders correct amount of user avatars', () => {
+      expect(findUserAvatars().length).toBe(3);
+    });
+
+    it('renders correct moreCount number', () => {
+      expect(findMoreCount().text()).toBe('+2');
+    });
+
+    it('should emit toggleDiscussions event on avatars click', () => {
+      findUserAvatars()
+        .at(0)
+        .trigger('click');
+
+      expect(wrapper.emitted().toggleLineDiscussions).toBeTruthy();
+    });
+
+    it('should emit toggleDiscussions event on more count text click', () => {
+      findMoreCount().trigger('click');
+
+      expect(wrapper.emitted().toggleLineDiscussions).toBeTruthy();
+    });
+  });
+
+  it('renders an empty more count string if there are no discussions', () => {
+    createComponent({
+      discussions: [],
+      discussionsExpanded: false,
+    });
+
+    expect(findMoreCount().exists()).toBe(false);
+  });
+
+  describe('tooltip text', () => {
+    beforeEach(() => {
+      createComponent({
+        discussions: getDiscussionsMockData(),
+        discussionsExpanded: false,
+      });
+    });
+
+    it('returns original comment if it is shorter than max length', () => {
+      const note = wrapper.vm.discussions[0].notes[0];
+
+      expect(wrapper.vm.getTooltipText(note)).toEqual('Administrator: comment 1');
+    });
+
+    it('returns truncated version of comment if it is longer than max length', () => {
+      const note = wrapper.vm.discussions[0].notes[1];
+
+      expect(wrapper.vm.getTooltipText(note)).toEqual('Fatih Acet: comment 2 is r...');
+    });
+  });
+});