Migrate note edited text spec to vue-test-utils

spec/frontend/notes/components/note_edited_text_spec.js

-import Vue from 'vue';
-import noteEditedText from '~/notes/components/note_edited_text.vue';
+import { shallowMount, createLocalVue } from '@vue/test-utils';
+import NoteEditedText from '~/notes/components/note_edited_text.vue';
 
-describe('note_edited_text', () => {
-  let vm;
-  let props;
-
-  beforeEach(() => {
-    const Component = Vue.extend(noteEditedText);
-    props = {
+const localVue = createLocalVue();
+const propsData = {
   actionText: 'Edited',
   className: 'foo-bar',
   editedAt: '2017-08-04T09:52:31.062Z',
@@ -19,29 +14,36 @@ describe('note_edited_text', () => {
     state: 'active',
     username: 'root',
   },
-    };
+};
+
+describe('NoteEditedText', () => {
+  let wrapper;
 
-    vm = new Component({
-      propsData: props,
-    }).$mount();
+  beforeEach(() => {
+    wrapper = shallowMount(NoteEditedText, {
+      localVue,
+      propsData,
+      sync: false,
+      attachToDocument: true,
+    });
   });
 
   afterEach(() => {
-    vm.$destroy();
+    wrapper.destroy();
   });
 
   it('should render block with provided className', () => {
-    expect(vm.$el.className).toEqual(props.className);
+    expect(wrapper.classes()).toContain(propsData.className);
   });
 
   it('should render provided actionText', () => {
-    expect(vm.$el.textContent).toContain(props.actionText);
+    expect(wrapper.text().trim()).toContain(propsData.actionText);
   });
 
   it('should render provided user information', () => {
-    const authorLink = vm.$el.querySelector('.js-user-link');
+    const authorLink = wrapper.find('.js-user-link');
 
-    expect(authorLink.getAttribute('href')).toEqual(props.editedBy.path);
-    expect(authorLink.textContent.trim()).toEqual(props.editedBy.name);
+    expect(authorLink.attributes('href')).toEqual(propsData.editedBy.path);
+    expect(authorLink.text().trim()).toEqual(propsData.editedBy.name);
   });
 });