Move EE specific testcase to EE spec file

Refactor `board_list` such that we can reuse the parts of component
creation with prop passing with ee specific spec.

spec/javascripts/boards/board_list_common_spec.js

+/* global List */
+/* global ListIssue */
+
+import MockAdapter from 'axios-mock-adapter';
+import Vue from 'vue';
+import axios from '~/lib/utils/axios_utils';
+import Sortable from 'sortablejs';
+import BoardList from '~/boards/components/board_list.vue';
+
+import '~/boards/models/issue';
+import '~/boards/models/list';
+import { listObj, boardsMockInterceptor, mockBoardService } from './mock_data';
+import boardsStore from '~/boards/stores/boards_store';
+
+window.Sortable = Sortable;
+
+export default function createComponent({ done, listIssueProps = {}, componentProps = {} }) {
+  const el = document.createElement('div');
+
+  document.body.appendChild(el);
+  const mock = new MockAdapter(axios);
+  mock.onAny().reply(boardsMockInterceptor);
+  gl.boardService = mockBoardService();
+  boardsStore.create();
+
+  const BoardListComp = Vue.extend(BoardList);
+  const list = new List(listObj);
+  const issue = new ListIssue({
+    title: 'Testing',
+    id: 1,
+    iid: 1,
+    confidential: false,
+    labels: [],
+    assignees: [],
+    ...listIssueProps,
+  });
+  list.issuesSize = 1;
+  list.issues.push(issue);
+
+  const component = new BoardListComp({
+    el,
+    propsData: {
+      disabled: false,
+      list,
+      issues: list.issues,
+      loading: false,
+      issueLinkBase: '/issues',
+      rootPath: '/',
+      ...componentProps,
+    },
+  }).$mount();
+
+  Vue.nextTick(() => {
+    done();
+  });
+
+  return { component, mock };
+}

spec/javascripts/boards/board_list_spec.js

-/* global List */
-/* global ListIssue */
-
 import Vue from 'vue';
-import MockAdapter from 'axios-mock-adapter';
-import axios from '~/lib/utils/axios_utils';
-import Sortable from 'sortablejs';
-import BoardList from '~/boards/components/board_list.vue';
 import eventHub from '~/boards/eventhub';
-import '~/boards/models/issue';
-import '~/boards/models/list';
-import boardsStore from '~/boards/stores/boards_store';
-import { listObj, boardsMockInterceptor, mockBoardService } from './mock_data';
-
-window.Sortable = Sortable;
+import createComponent from './board_list_common_spec';
 
 describe('Board list component', () => {
   let mock;
   let component;
 
   beforeEach(done => {
-    const el = document.createElement('div');
-
-    document.body.appendChild(el);
-    mock = new MockAdapter(axios);
-    mock.onAny().reply(boardsMockInterceptor);
-    gl.boardService = mockBoardService();
-    boardsStore.create();
-
-    const BoardListComp = Vue.extend(BoardList);
-    const list = new List(listObj);
-    const issue = new ListIssue({
-      title: 'Testing',
-      id: 1,
-      iid: 1,
-      confidential: false,
-      labels: [],
-      assignees: [],
-    });
-    list.issuesSize = 1;
-    list.issues.push(issue);
-
-    component = new BoardListComp({
-      el,
-      propsData: {
-        disabled: false,
-        list,
-        issues: list.issues,
-        loading: false,
-        issueLinkBase: '/issues',
-        rootPath: '/',
-      },
-    }).$mount();
-
-    Vue.nextTick(() => {
-      done();
-    });
+    ({ mock, component } = createComponent({ done }));
   });
 
   afterEach(() => {