Migrate issue boards specs to Jest & VTU

Migrated boards specs that rely on tooltips to Jest & Vue Test Utils

spec/javascripts/boards/components/issue_time_estimate_spec.js → spec/frontend/boards/components/issue_time_estimate_spec.js

-import Vue from 'vue';
 import IssueTimeEstimate from '~/boards/components/issue_time_estimate.vue';
 import boardsStore from '~/boards/stores/boards_store';
-import mountComponent from '../../helpers/vue_mount_component_helper';
+import { shallowMount } from '@vue/test-utils';
 
 describe('Issue Time Estimate component', () => {
-  let vm;
+  let wrapper;
 
   beforeEach(() => {
     boardsStore.create();
   });
 
   afterEach(() => {
-    vm.$destroy();
+    wrapper.destroy();
   });
 
   describe('when limitToHours is false', () => {
     beforeEach(() => {
       boardsStore.timeTracking.limitToHours = false;
-
-      const Component = Vue.extend(IssueTimeEstimate);
-      vm = mountComponent(Component, {
-        estimate: 374460,
+      wrapper = shallowMount(IssueTimeEstimate, {
+        propsData: {
+          estimate: 374460,
+        },
+        sync: false,
       });
     });
 
     it('renders the correct time estimate', () => {
-      expect(vm.$el.querySelector('time').textContent.trim()).toEqual('2w 3d 1m');
+      expect(
+        wrapper
+          .find('time')
+          .text()
+          .trim(),
+      ).toEqual('2w 3d 1m');
     });
 
     it('renders expanded time estimate in tooltip', () => {
-      expect(vm.$el.querySelector('.js-issue-time-estimate').textContent).toContain(
-        '2 weeks 3 days 1 minute',
-      );
+      expect(wrapper.find('.js-issue-time-estimate').text()).toContain('2 weeks 3 days 1 minute');
     });
 
     it('prevents tooltip xss', done => {
-      const alertSpy = spyOn(window, 'alert');
-      vm.estimate = 'Foo <script>alert("XSS")</script>';
-
-      vm.$nextTick(() => {
+      const alertSpy = jest.spyOn(window, 'alert');
+      wrapper.setProps({ estimate: 'Foo <script>alert("XSS")</script>' });
+      wrapper.vm.$nextTick(() => {
         expect(alertSpy).not.toHaveBeenCalled();
-        expect(vm.$el.querySelector('time').textContent.trim()).toEqual('0m');
-        expect(vm.$el.querySelector('.js-issue-time-estimate').textContent).toContain('0m');
+        expect(
+          wrapper
+            .find('time')
+            .text()
+            .trim(),
+        ).toEqual('0m');
+        expect(wrapper.find('.js-issue-time-estimate').text()).toContain('0m');
         done();
       });
     });
@@ -50,21 +57,25 @@ describe('Issue Time Estimate component', () => {
   describe('when limitToHours is true', () => {
     beforeEach(() => {
       boardsStore.timeTracking.limitToHours = true;
-
-      const Component = Vue.extend(IssueTimeEstimate);
-      vm = mountComponent(Component, {
-        estimate: 374460,
+      wrapper = shallowMount(IssueTimeEstimate, {
+        propsData: {
+          estimate: 374460,
+        },
+        sync: false,
       });
     });
 
     it('renders the correct time estimate', () => {
-      expect(vm.$el.querySelector('time').textContent.trim()).toEqual('104h 1m');
+      expect(
+        wrapper
+          .find('time')
+          .text()
+          .trim(),
+      ).toEqual('104h 1m');
     });
 
     it('renders expanded time estimate in tooltip', () => {
-      expect(vm.$el.querySelector('.js-issue-time-estimate').textContent).toContain(
-        '104 hours 1 minute',
-      );
+      expect(wrapper.find('.js-issue-time-estimate').text()).toContain('104 hours 1 minute');
     });
   });
 });