1 files changed, 114 insertions, 0 deletions
diff --git a/spec/javascripts/vue_shared/components/issue/issue_assignees_spec.js b/spec/javascripts/vue_shared/components/issue/issue_assignees_spec.js
new file mode 100644
index 00000000000..9eac75fac96
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+++ b/spec/javascripts/vue_shared/components/issue/issue_assignees_spec.js
@@ -0,0 +1,114 @@
+import Vue from 'vue';
+
+import IssueAssignees from '~/vue_shared/components/issue/issue_assignees.vue';
+
+import mountComponent from 'spec/helpers/vue_mount_component_helper';
+import { mockAssigneesList } from 'spec/boards/mock_data';
+
+const createComponent = (assignees = mockAssigneesList, cssClass = '') => {
+  const Component = Vue.extend(IssueAssignees);
+
+  return mountComponent(Component, {
+    assignees,
+    cssClass,
+  });
+};
+
+describe('IssueAssigneesComponent', () => {
+  let vm;
+
+  beforeEach(() => {
+    vm = createComponent();
+  });
+
+  afterEach(() => {
+    vm.$destroy();
+  });
+
+  describe('data', () => {
+    it('returns default data props', () => {
+      expect(vm.maxVisibleAssignees).toBe(2);
+      expect(vm.maxAssigneeAvatars).toBe(3);
+      expect(vm.maxAssignees).toBe(99);
+    });
+  });
+
+  describe('computed', () => {
+    describe('countOverLimit', () => {
+      it('should return difference between assignees count and maxVisibleAssignees', () => {
+        expect(vm.countOverLimit).toBe(mockAssigneesList.length - vm.maxVisibleAssignees);
+      });
+    });
+
+    describe('assigneesToShow', () => {
+      it('should return assignees containing only 2 items when count more than maxAssigneeAvatars', () => {
+        expect(vm.assigneesToShow.length).toBe(2);
+      });
+
+      it('should return all assignees as it is when count less than maxAssigneeAvatars', () => {
+        vm.assignees = mockAssigneesList.slice(0, 3); // Set 3 Assignees
+
+        expect(vm.assigneesToShow.length).toBe(3);
+      });
+    });
+
+    describe('assigneesCounterTooltip', () => {
+      it('should return string containing count of remaining assignees when count more than maxAssigneeAvatars', () => {
+        expect(vm.assigneesCounterTooltip).toBe('3 more assignees');
+      });
+    });
+
+    describe('shouldRenderAssigneesCounter', () => {
+      it('should return `false` when assignees count less than maxAssigneeAvatars', () => {
+        vm.assignees = mockAssigneesList.slice(0, 3); // Set 3 Assignees
+
+        expect(vm.shouldRenderAssigneesCounter).toBe(false);
+      });
+
+      it('should return `true` when assignees count more than maxAssigneeAvatars', () => {
+        expect(vm.shouldRenderAssigneesCounter).toBe(true);
+      });
+    });
+
+    describe('assigneeCounterLabel', () => {
+      it('should return count of additional assignees total assignees count more than maxAssigneeAvatars', () => {
+        expect(vm.assigneeCounterLabel).toBe('+3');
+      });
+    });
+  });
+
+  describe('methods', () => {
+    describe('avatarUrlTitle', () => {
+      it('returns string containing alt text for assignee avatar', () => {
+        expect(vm.avatarUrlTitle(mockAssigneesList[0])).toBe('Avatar for Terrell Graham');
+      });
+    });
+  });
+
+  describe('template', () => {
+    it('renders component root element with class `issue-assignees`', () => {
+      expect(vm.$el.classList.contains('issue-assignees')).toBe(true);
+    });
+
+    it('renders assignee avatars', () => {
+      expect(vm.$el.querySelectorAll('.user-avatar-link').length).toBe(2);
+    });
+
+    it('renders assignee tooltips', () => {
+      const tooltipText = vm.$el
+        .querySelectorAll('.user-avatar-link')[0]
+        .querySelector('.js-assignee-tooltip').innerText;
+
+      expect(tooltipText).toContain('Assignee');
+      expect(tooltipText).toContain('Terrell Graham');
+      expect(tooltipText).toContain('@monserrate.gleichner');
+    });
+
+    it('renders additional assignees count', () => {
+      const avatarCounterEl = vm.$el.querySelector('.avatar-counter');
+
+      expect(avatarCounterEl.innerText.trim()).toBe('+3');
+      expect(avatarCounterEl.getAttribute('data-original-title')).toBe('3 more assignees');
+    });
+  });
+});