Update issue_show app_spec.js to use vue-test-utils

Updated it as it did not use vue-test-utils

spec/frontend/issue_show/components/app_spec.js

-import Vue from 'vue';
+import { mount } from '@vue/test-utils';
 import MockAdapter from 'axios-mock-adapter';
 import { TEST_HOST } from 'helpers/test_constants';
 import axios from '~/lib/utils/axios_utils';
 import { visitUrl } from '~/lib/utils/url_utility';
 import '~/behaviors/markdown/render_gfm';
-import issuableApp from '~/issue_show/components/app.vue';
+import IssuableApp from '~/issue_show/components/app.vue';
 import eventHub from '~/issue_show/event_hub';
 import { initialRequest, secondRequest } from '../mock_data';
 
@@ -23,7 +23,7 @@ const publishedIncidentUrl = 'https://status.com/';
 describe('Issuable output', () => {
   let mock;
   let realtimeRequestCount = 0;
-  let vm;
+  let wrapper;
 
   beforeEach(() => {
     setFixtures(`
@@ -42,8 +42,6 @@ describe('Issuable output', () => {
       </div>
     `);
 
-    const IssuableDescriptionComponent = Vue.extend(issuableApp);
-
     mock = new MockAdapter(axios);
     mock
       .onGet('/gitlab-org/gitlab-shell/-/issues/9/realtime_changes/realtime_changes')
@@ -53,7 +51,7 @@ describe('Issuable output', () => {
         return res;
       });
 
-    vm = new IssuableDescriptionComponent({
+    wrapper = mount(IssuableApp, {
       propsData: {
         canUpdate: true,
         canDestroy: true,
@@ -73,15 +71,16 @@ describe('Issuable output', () => {
         zoomMeetingUrl,
         publishedIncidentUrl,
       },
-    }).$mount();
+    });
   });
 
   afterEach(() => {
     mock.restore();
     realtimeRequestCount = 0;
 
-    vm.poll.stop();
-    vm.$destroy();
+    wrapper.vm.poll.stop();
+    wrapper.destroy();
+    wrapper = null;
   });
 
   it('should render a title/description/edited and update title/description/edited on update', () => {
@@ -89,101 +88,100 @@ describe('Issuable output', () => {
     return axios
       .waitForAll()
       .then(() => {
-        editedText = vm.$el.querySelector('.edited-text');
+        editedText = wrapper.find('.edited-text');
       })
       .then(() => {
         expect(document.querySelector('title').innerText).toContain('this is a title (#1)');
-        expect(vm.$el.querySelector('.title').innerHTML).toContain('<p>this is a title</p>');
-        expect(vm.$el.querySelector('.md').innerHTML).toContain('<p>this is a description!</p>');
-        expect(vm.$el.querySelector('.js-task-list-field').value).toContain(
+        expect(wrapper.find('.title').text()).toContain('this is a title');
+        expect(wrapper.find('.md').text()).toContain('this is a description!');
+        expect(wrapper.find('.js-task-list-field').element.value).toContain(
           'this is a description',
         );
 
-        expect(formatText(editedText.innerText)).toMatch(/Edited[\s\S]+?by Some User/);
-        expect(editedText.querySelector('.author-link').href).toMatch(/\/some_user$/);
-        expect(editedText.querySelector('time')).toBeTruthy();
-        expect(vm.state.lock_version).toEqual(1);
+        expect(formatText(editedText.text())).toMatch(/Edited[\s\S]+?by Some User/);
+        expect(editedText.find('.author-link').attributes('href')).toMatch(/\/some_user$/);
+        expect(editedText.find('time').text()).toBeTruthy();
+        expect(wrapper.vm.state.lock_version).toEqual(1);
       })
       .then(() => {
-        vm.poll.makeRequest();
+        wrapper.vm.poll.makeRequest();
         return axios.waitForAll();
       })
       .then(() => {
         expect(document.querySelector('title').innerText).toContain('2 (#1)');
-        expect(vm.$el.querySelector('.title').innerHTML).toContain('<p>2</p>');
-        expect(vm.$el.querySelector('.md').innerHTML).toContain('<p>42</p>');
-        expect(vm.$el.querySelector('.js-task-list-field').value).toContain('42');
-        expect(vm.$el.querySelector('.edited-text')).toBeTruthy();
-        expect(formatText(vm.$el.querySelector('.edited-text').innerText)).toMatch(
+        expect(wrapper.find('.title').text()).toContain('2');
+        expect(wrapper.find('.md').text()).toContain('42');
+        expect(wrapper.find('.js-task-list-field').element.value).toContain('42');
+        expect(wrapper.find('.edited-text').text()).toBeTruthy();
+        expect(formatText(wrapper.find('.edited-text').text())).toMatch(
           /Edited[\s\S]+?by Other User/,
         );
 
-        expect(editedText.querySelector('.author-link').href).toMatch(/\/other_user$/);
-        expect(editedText.querySelector('time')).toBeTruthy();
-        expect(vm.state.lock_version).toEqual(2);
+        expect(editedText.find('.author-link').attributes('href')).toMatch(/\/other_user$/);
+        expect(editedText.find('time').text()).toBeTruthy();
+        expect(wrapper.vm.state.lock_version).toEqual(2);
       });
   });
 
   it('shows actions if permissions are correct', () => {
-    vm.showForm = true;
+    wrapper.vm.showForm = true;
 
-    return vm.$nextTick().then(() => {
-      expect(vm.$el.querySelector('.btn')).not.toBeNull();
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.contains('.markdown-selector')).toBe(true);
     });
   });
 
   it('does not show actions if permissions are incorrect', () => {
-    vm.showForm = true;
-    vm.canUpdate = false;
+    wrapper.vm.showForm = true;
+    wrapper.setProps({ canUpdate: false });
 
-    return vm.$nextTick().then(() => {
-      expect(vm.$el.querySelector('.markdown-selector')).toBeNull();
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.contains('.markdown-selector')).toBe(false);
     });
   });
 
   it('does not update formState if form is already open', () => {
-    vm.updateAndShowForm();
+    wrapper.vm.updateAndShowForm();
 
-    vm.state.titleText = 'testing 123';
+    wrapper.vm.state.titleText = 'testing 123';
 
-    vm.updateAndShowForm();
+    wrapper.vm.updateAndShowForm();
 
-    return vm.$nextTick().then(() => {
-      expect(vm.store.formState.title).not.toBe('testing 123');
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.vm.store.formState.title).not.toBe('testing 123');
     });
   });
 
   it('opens reCAPTCHA modal if update rejected as spam', () => {
     let modal;
 
-    jest.spyOn(vm.service, 'updateIssuable').mockResolvedValue({
+    jest.spyOn(wrapper.vm.service, 'updateIssuable').mockResolvedValue({
       data: {
         recaptcha_html: '<div class="g-recaptcha">recaptcha_html</div>',
       },
     });
 
-    vm.canUpdate = true;
-    vm.showForm = true;
+    wrapper.vm.canUpdate = true;
+    wrapper.vm.showForm = true;
 
-    return vm
+    return wrapper.vm
       .$nextTick()
       .then(() => {
-        vm.$refs.recaptchaModal.scriptSrc = '//scriptsrc';
-        return vm.updateIssuable();
+        wrapper.vm.$refs.recaptchaModal.scriptSrc = '//scriptsrc';
+        return wrapper.vm.updateIssuable();
       })
       .then(() => {
-        modal = vm.$el.querySelector('.js-recaptcha-modal');
-
-        expect(modal.style.display).not.toEqual('none');
-        expect(modal.querySelector('.g-recaptcha').textContent).toEqual('recaptcha_html');
+        modal = wrapper.find('.js-recaptcha-modal');
+        expect(modal.isVisible()).toBe(true);
+        expect(modal.find('.g-recaptcha').text()).toEqual('recaptcha_html');
         expect(document.body.querySelector('.js-recaptcha-script').src).toMatch('//scriptsrc');
       })
       .then(() => {
-        modal.querySelector('.close').click();
-        return vm.$nextTick();
+        modal.find('.close').trigger('click');
+        return wrapper.vm.$nextTick();
       })
       .then(() => {
-        expect(modal.style.display).toEqual('none');
+        expect(modal.isVisible()).toBe(false);
         expect(document.body.querySelector('.js-recaptcha-script')).toBeNull();
       });
   });
@@ -194,102 +192,105 @@ describe('Issuable output', () => {
       ${'zoomMeetingUrl'}       | ${zoomMeetingUrl}
       ${'publishedIncidentUrl'} | ${publishedIncidentUrl}
     `('sets the $prop correctly on underlying pinned links', ({ prop, value }) => {
-      expect(vm[prop]).toEqual(value);
-      expect(vm.$el.querySelector(`[data-testid="${prop}"]`).href).toBe(value);
+      expect(wrapper.vm[prop]).toEqual(value);
+      expect(wrapper.find(`[data-testid="${prop}"]`).attributes('href')).toBe(value);
     });
   });
 
   describe('updateIssuable', () => {
     it('fetches new data after update', () => {
-      const updateStoreSpy = jest.spyOn(vm, 'updateStoreState');
-      const getDataSpy = jest.spyOn(vm.service, 'getData');
-      jest.spyOn(vm.service, 'updateIssuable').mockResolvedValue({
+      const updateStoreSpy = jest.spyOn(wrapper.vm, 'updateStoreState');
+      const getDataSpy = jest.spyOn(wrapper.vm.service, 'getData');
+      jest.spyOn(wrapper.vm.service, 'updateIssuable').mockResolvedValue({
         data: { web_url: window.location.pathname },
       });
 
-      return vm.updateIssuable().then(() => {
+      return wrapper.vm.updateIssuable().then(() => {
         expect(updateStoreSpy).toHaveBeenCalled();
         expect(getDataSpy).toHaveBeenCalled();
       });
     });
 
     it('correctly updates issuable data', () => {
-      const spy = jest.spyOn(vm.service, 'updateIssuable').mockResolvedValue({
+      const spy = jest.spyOn(wrapper.vm.service, 'updateIssuable').mockResolvedValue({
         data: { web_url: window.location.pathname },
       });
 
-      return vm.updateIssuable().then(() => {
-        expect(spy).toHaveBeenCalledWith(vm.formState);
+      return wrapper.vm.updateIssuable().then(() => {
+        expect(spy).toHaveBeenCalledWith(wrapper.vm.formState);
         expect(eventHub.$emit).toHaveBeenCalledWith('close.form');
       });
     });
 
     it('does not redirect if issue has not moved', () => {
-      jest.spyOn(vm.service, 'updateIssuable').mockResolvedValue({
+      jest.spyOn(wrapper.vm.service, 'updateIssuable').mockResolvedValue({
         data: {
           web_url: window.location.pathname,
-          confidential: vm.isConfidential,
+          confidential: wrapper.vm.isConfidential,
         },
       });
 
-      return vm.updateIssuable().then(() => {
+      return wrapper.vm.updateIssuable().then(() => {
         expect(visitUrl).not.toHaveBeenCalled();
       });
     });
 
     it('does not redirect if issue has not moved and user has switched tabs', () => {
-      jest.spyOn(vm.service, 'updateIssuable').mockResolvedValue({
+      jest.spyOn(wrapper.vm.service, 'updateIssuable').mockResolvedValue({
         data: {
           web_url: '',
-          confidential: vm.isConfidential,
+          confidential: wrapper.vm.isConfidential,
         },
       });
 
-      return vm.updateIssuable().then(() => {
+      return wrapper.vm.updateIssuable().then(() => {
         expect(visitUrl).not.toHaveBeenCalled();
       });
     });
 
     it('redirects if returned web_url has changed', () => {
-      jest.spyOn(vm.service, 'updateIssuable').mockResolvedValue({
+      jest.spyOn(wrapper.vm.service, 'updateIssuable').mockResolvedValue({
         data: {
           web_url: '/testing-issue-move',
-          confidential: vm.isConfidential,
+          confidential: wrapper.vm.isConfidential,
         },
       });
 
-      vm.updateIssuable();
+      wrapper.vm.updateIssuable();
 
-      return vm.updateIssuable().then(() => {
+      return wrapper.vm.updateIssuable().then(() => {
         expect(visitUrl).toHaveBeenCalledWith('/testing-issue-move');
       });
     });
 
     describe('shows dialog when issue has unsaved changed', () => {
       it('confirms on title change', () => {
-        vm.showForm = true;
-        vm.state.titleText = 'title has changed';
+        wrapper.vm.showForm = true;
+        wrapper.vm.state.titleText = 'title has changed';
         const e = { returnValue: null };
-        vm.handleBeforeUnloadEvent(e);
-        return vm.$nextTick().then(() => {
+        wrapper.vm.handleBeforeUnloadEvent(e);
+
+        return wrapper.vm.$nextTick().then(() => {
           expect(e.returnValue).not.toBeNull();
         });
       });
 
       it('confirms on description change', () => {
-        vm.showForm = true;
-        vm.state.descriptionText = 'description has changed';
+        wrapper.vm.showForm = true;
+        wrapper.vm.state.descriptionText = 'description has changed';
         const e = { returnValue: null };
-        vm.handleBeforeUnloadEvent(e);
-        return vm.$nextTick().then(() => {
+        wrapper.vm.handleBeforeUnloadEvent(e);
+
+        return wrapper.vm.$nextTick().then(() => {
           expect(e.returnValue).not.toBeNull();
         });
       });
 
       it('does nothing when nothing has changed', () => {
         const e = { returnValue: null };
-        vm.handleBeforeUnloadEvent(e);
-        return vm.$nextTick().then(() => {
+        wrapper.vm.handleBeforeUnloadEvent(e);
+
+        return wrapper.vm.$nextTick().then(() => {
           expect(e.returnValue).toBeNull();
         });
       });
@@ -297,8 +298,9 @@ describe('Issuable output', () => {
 
     describe('error when updating', () => {
       it('closes form on error', () => {
-        jest.spyOn(vm.service, 'updateIssuable').mockRejectedValue();
-        return vm.updateIssuable().then(() => {
+        jest.spyOn(wrapper.vm.service, 'updateIssuable').mockRejectedValue();
+
+        return wrapper.vm.updateIssuable().then(() => {
           expect(eventHub.$emit).not.toHaveBeenCalledWith('close.form');
           expect(document.querySelector('.flash-container .flash-text').innerText.trim()).toBe(
             `Error updating issue`,
@@ -307,12 +309,12 @@ describe('Issuable output', () => {
       });
 
       it('returns the correct error message for issuableType', () => {
-        jest.spyOn(vm.service, 'updateIssuable').mockRejectedValue();
-        vm.issuableType = 'merge request';
+        jest.spyOn(wrapper.vm.service, 'updateIssuable').mockRejectedValue();
+        wrapper.setProps({ issuableType: 'merge request' });
 
-        return vm
+        return wrapper.vm
           .$nextTick()
-          .then(vm.updateIssuable)
+          .then(wrapper.vm.updateIssuable)
           .then(() => {
             expect(eventHub.$emit).not.toHaveBeenCalledWith('close.form');
             expect(document.querySelector('.flash-container .flash-text').innerText.trim()).toBe(
@@ -324,12 +326,12 @@ describe('Issuable output', () => {
       it('shows error message from backend if exists', () => {
         const msg = 'Custom error message from backend';
         jest
-          .spyOn(vm.service, 'updateIssuable')
+          .spyOn(wrapper.vm.service, 'updateIssuable')
           .mockRejectedValue({ response: { data: { errors: [msg] } } });
 
-        return vm.updateIssuable().then(() => {
+        return wrapper.vm.updateIssuable().then(() => {
           expect(document.querySelector('.flash-container .flash-text').innerText.trim()).toBe(
-            `${vm.defaultErrorMessage}. ${msg}`,
+            `${wrapper.vm.defaultErrorMessage}. ${msg}`,
           );
         });
       });
@@ -338,34 +340,34 @@ describe('Issuable output', () => {
 
   describe('deleteIssuable', () => {
     it('changes URL when deleted', () => {
-      jest.spyOn(vm.service, 'deleteIssuable').mockResolvedValue({
+      jest.spyOn(wrapper.vm.service, 'deleteIssuable').mockResolvedValue({
         data: {
           web_url: '/test',
         },
       });
 
-      return vm.deleteIssuable().then(() => {
+      return wrapper.vm.deleteIssuable().then(() => {
         expect(visitUrl).toHaveBeenCalledWith('/test');
       });
     });
 
     it('stops polling when deleting', () => {
-      const spy = jest.spyOn(vm.poll, 'stop');
-      jest.spyOn(vm.service, 'deleteIssuable').mockResolvedValue({
+      const spy = jest.spyOn(wrapper.vm.poll, 'stop');
+      jest.spyOn(wrapper.vm.service, 'deleteIssuable').mockResolvedValue({
         data: {
           web_url: '/test',
         },
       });
 
-      return vm.deleteIssuable().then(() => {
+      return wrapper.vm.deleteIssuable().then(() => {
         expect(spy).toHaveBeenCalledWith();
       });
     });
 
     it('closes form on error', () => {
-      jest.spyOn(vm.service, 'deleteIssuable').mockRejectedValue();
+      jest.spyOn(wrapper.vm.service, 'deleteIssuable').mockRejectedValue();
 
-      return vm.deleteIssuable().then(() => {
+      return wrapper.vm.deleteIssuable().then(() => {
         expect(eventHub.$emit).not.toHaveBeenCalledWith('close.form');
         expect(document.querySelector('.flash-container .flash-text').innerText.trim()).toBe(
           'Error deleting issue',
@@ -376,23 +378,25 @@ describe('Issuable output', () => {
 
   describe('updateAndShowForm', () => {
     it('shows locked warning if form is open & data is different', () => {
-      return vm
+      return wrapper.vm
         .$nextTick()
         .then(() => {
-          vm.updateAndShowForm();
+          wrapper.vm.updateAndShowForm();
 
-          vm.poll.makeRequest();
+          wrapper.vm.poll.makeRequest();
 
           return new Promise(resolve => {
-            vm.$watch('formState.lockedWarningVisible', value => {
-              if (value) resolve();
+            wrapper.vm.$watch('formState.lockedWarningVisible', value => {
+              if (value) {
+                resolve();
+              }
             });
           });
         })
         .then(() => {
-          expect(vm.formState.lockedWarningVisible).toEqual(true);
-          expect(vm.formState.lock_version).toEqual(1);
-          expect(vm.$el.querySelector('.alert')).not.toBeNull();
+          expect(wrapper.vm.formState.lockedWarningVisible).toEqual(true);
+          expect(wrapper.vm.formState.lock_version).toEqual(1);
+          expect(wrapper.contains('.alert')).toBe(true);
         });
     });
   });
@@ -401,14 +405,14 @@ describe('Issuable output', () => {
     let formSpy;
 
     beforeEach(() => {
-      formSpy = jest.spyOn(vm, 'updateAndShowForm');
+      formSpy = jest.spyOn(wrapper.vm, 'updateAndShowForm');
     });
 
     it('shows the form if template names request is successful', () => {
       const mockData = [{ name: 'Bug' }];
       mock.onGet('/issuable-templates-path').reply(() => Promise.resolve([200, mockData]));
 
-      return vm.requestTemplatesAndShowForm().then(() => {
+      return wrapper.vm.requestTemplatesAndShowForm().then(() => {
         expect(formSpy).toHaveBeenCalledWith(mockData);
       });
     });
@@ -418,7 +422,7 @@ describe('Issuable output', () => {
         .onGet('/issuable-templates-path')
         .reply(() => Promise.reject(new Error('something went wrong')));
 
-      return vm.requestTemplatesAndShowForm().then(() => {
+      return wrapper.vm.requestTemplatesAndShowForm().then(() => {
         expect(document.querySelector('.flash-container .flash-text').textContent).toContain(
           'Error updating issue',
         );
@@ -430,35 +434,39 @@ describe('Issuable output', () => {
 
   describe('show inline edit button', () => {
     it('should not render by default', () => {
-      expect(vm.$el.querySelector('.title-container .note-action-button')).toBeDefined();
+      expect(wrapper.contains('.btn-edit')).toBe(true);
     });
 
     it('should render if showInlineEditButton', () => {
-      vm.showInlineEditButton = true;
+      wrapper.setProps({ showInlineEditButton: true });
 
-      expect(vm.$el.querySelector('.title-container .note-action-button')).toBeDefined();
+      return wrapper.vm.$nextTick(() => {
+        expect(wrapper.contains('.btn-edit')).toBe(true);
+      });
     });
   });
 
   describe('updateStoreState', () => {
     it('should make a request and update the state of the store', () => {
       const data = { foo: 1 };
-      const getDataSpy = jest.spyOn(vm.service, 'getData').mockResolvedValue({ data });
-      const updateStateSpy = jest.spyOn(vm.store, 'updateState').mockImplementation(jest.fn);
+      const getDataSpy = jest.spyOn(wrapper.vm.service, 'getData').mockResolvedValue({ data });
+      const updateStateSpy = jest
+        .spyOn(wrapper.vm.store, 'updateState')
+        .mockImplementation(jest.fn);
 
-      return vm.updateStoreState().then(() => {
+      return wrapper.vm.updateStoreState().then(() => {
         expect(getDataSpy).toHaveBeenCalled();
         expect(updateStateSpy).toHaveBeenCalledWith(data);
       });
     });
 
     it('should show error message if store update fails', () => {
-      jest.spyOn(vm.service, 'getData').mockRejectedValue();
-      vm.issuableType = 'merge request';
+      jest.spyOn(wrapper.vm.service, 'getData').mockRejectedValue();
+      wrapper.setProps({ issuableType: 'merge request' });
 
-      return vm.updateStoreState().then(() => {
+      return wrapper.vm.updateStoreState().then(() => {
         expect(document.querySelector('.flash-container .flash-text').innerText.trim()).toBe(
-          `Error updating ${vm.issuableType}`,
+          `Error updating ${wrapper.vm.issuableType}`,
         );
       });
     });
@@ -466,48 +474,50 @@ describe('Issuable output', () => {
 
   describe('issueChanged', () => {
     beforeEach(() => {
-      vm.store.formState.title = '';
-      vm.store.formState.description = '';
-      vm.initialDescriptionText = '';
-      vm.initialTitleText = '';
+      wrapper.vm.store.formState.title = '';
+      wrapper.vm.store.formState.description = '';
+      wrapper.setProps({
+        initialDescriptionText: '',
+        initialTitleText: '',
+      });
     });
 
     it('returns true when title is changed', () => {
-      vm.store.formState.title = 'RandomText';
+      wrapper.vm.store.formState.title = 'RandomText';
 
-      expect(vm.issueChanged).toBe(true);
+      expect(wrapper.vm.issueChanged).toBe(true);
     });
 
     it('returns false when title is empty null', () => {
-      vm.store.formState.title = null;
+      wrapper.vm.store.formState.title = null;
 
-      expect(vm.issueChanged).toBe(false);
+      expect(wrapper.vm.issueChanged).toBe(false);
     });
 
     it('returns false when `initialTitleText` is null and `formState.title` is empty string', () => {
-      vm.store.formState.title = '';
-      vm.initialTitleText = null;
+      wrapper.vm.store.formState.title = '';
+      wrapper.setProps({ initialTitleText: null });
 
-      expect(vm.issueChanged).toBe(false);
+      expect(wrapper.vm.issueChanged).toBe(false);
     });
 
     it('returns true when description is changed', () => {
-      vm.store.formState.description = 'RandomText';
+      wrapper.vm.store.formState.description = 'RandomText';
 
-      expect(vm.issueChanged).toBe(true);
+      expect(wrapper.vm.issueChanged).toBe(true);
     });
 
     it('returns false when description is empty null', () => {
-      vm.store.formState.title = null;
+      wrapper.vm.store.formState.description = null;
 
-      expect(vm.issueChanged).toBe(false);
+      expect(wrapper.vm.issueChanged).toBe(false);
     });
 
     it('returns false when `initialDescriptionText` is null and `formState.description` is empty string', () => {
-      vm.store.formState.description = '';
-      vm.initialDescriptionText = null;
+      wrapper.vm.store.formState.description = '';
+      wrapper.setProps({ initialDescriptionText: null });
 
-      expect(vm.issueChanged).toBe(false);
+      expect(wrapper.vm.issueChanged).toBe(false);
     });
   });
 });