Prepare vue_shared specs for bv upgrade

- Set attachDocument as true
- Set sync as false

spec/frontend/vue_shared/components/changed_file_icon_spec.js

@@ -19,6 +19,7 @@ describe('Changed file icon', () => {
         ...props,
       },
       sync: false,
+      attachToDocument: true,
     });
   };
 

spec/frontend/vue_shared/components/commit_spec.js

@@ -13,6 +13,7 @@ describe('Commit component', () => {
     wrapper = shallowMount(CommitComponent, {
       propsData,
       sync: false,
+      attachToDocument: true,
     });
   };
 

spec/frontend/vue_shared/components/issue/issue_assignees_spec.js

@@ -18,6 +18,7 @@ describe('IssueAssigneesComponent', () => {
         ...props,
       },
       sync: false,
+      attachToDocument: true,
     });
     vm = wrapper.vm; // eslint-disable-line
   };

spec/frontend/vue_shared/components/issue/issue_milestone_spec.js

 import Vue from 'vue';
-import { mount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 
 import IssueMilestone from '~/vue_shared/components/issue/issue_milestone.vue';
+import Icon from '~/vue_shared/components/icon.vue';
 
 import { mockMilestone } from '../../../../javascripts/boards/mock_data';
 
 const createComponent = (milestone = mockMilestone) => {
   const Component = Vue.extend(IssueMilestone);
 
-  return mount(Component, {
+  return shallowMount(Component, {
     propsData: {
       milestone,
     },
     sync: false,
+    attachToDocument: true,
   });
 };
 
@@ -156,7 +158,7 @@ describe('IssueMilestoneComponent', () => {
     });
 
     it('renders milestone icon', () => {
-      expect(vm.$el.querySelector('svg use').getAttribute('xlink:href')).toContain('clock');
+      expect(wrapper.find(Icon).props('name')).toBe('clock');
     });
 
     it('renders milestone title', () => {

spec/frontend/vue_shared/components/issue/related_issuable_item_spec.js

@@ -35,6 +35,7 @@ describe('RelatedIssuableItem', () => {
       localVue,
       slots,
       sync: false,
+      attachToDocument: true,
       propsData: props,
     });
   });

spec/frontend/vue_shared/components/markdown/suggestion_diff_header_spec.js

@@ -21,6 +21,7 @@ describe('Suggestion Diff component', () => {
       },
       localVue,
       sync: false,
+      attachToDocument: true,
     });
   };
 

spec/frontend/vue_shared/components/modal_copy_button_spec.js

@@ -16,6 +16,8 @@ describe('modal copy button', () => {
         text: 'copy me',
         title: 'Copy this value',
       },
+      attachToDocument: true,
+      sync: false,
     });
   });
 

spec/frontend/vue_shared/components/paginated_list_spec.js

@@ -26,6 +26,8 @@ describe('Pagination links component', () => {
         list: [{ id: 'foo' }, { id: 'bar' }],
         props,
       },
+      attachToDocument: true,
+      sync: false,
     });
 
     [glPaginatedList] = wrapper.vm.$children;

spec/frontend/vue_shared/components/sidebar/labels_select/base_spec.js

 import Vue from 'vue';
 
 import LabelsSelect from '~/labels_select';
-import baseComponent from '~/vue_shared/components/sidebar/labels_select/base.vue';
+import BaseComponent from '~/vue_shared/components/sidebar/labels_select/base.vue';
 
-import { mount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import {
   mockConfig,
   mockLabels,
 } from '../../../../../javascripts/vue_shared/components/sidebar/labels_select/mock_data';
 
-const createComponent = (config = mockConfig) => {
-  const Component = Vue.extend(baseComponent);
-
-  return mount(Component, {
+const createComponent = (config = mockConfig) =>
+  shallowMount(BaseComponent, {
     propsData: config,
     sync: false,
+    attachToDocument: true,
   });
-};
 
 describe('BaseComponent', () => {
   let wrapper;