Merge branch 'move-boards-interceptor' into 'master'

Move Ajax interceptor into describe block

## What does this MR do?

Move registering the Vue resource interceptor for issue board mock data into the corresponding `describe` blocks.

## Why was this MR needed?

Currently, the interceptor is registered for every test (which makes them at best fail for Ajax calls using Vue resource).

See merge request !7304

spec/javascripts/boards/boards_store_spec.js.es6

@@ -13,8 +13,9 @@
 //= require boards/stores/boards_store
 //= require ./mock_data
 
-(() => {
+describe('Store', () => {
   beforeEach(() => {
+    Vue.http.interceptors.push(boardsMockInterceptor);
     gl.boardService = new BoardService('/test/issue-boards/board', '1');
     gl.issueBoards.BoardsStore.create();
 
@@ -24,7 +25,10 @@
     });
   });
 
-  describe('Store', () => {
+  afterEach(() => {
+    Vue.http.interceptors = _.without(Vue.http.interceptors, boardsMockInterceptor);
+  });
+
   it('starts with a blank state', () => {
     expect(gl.issueBoards.BoardsStore.state.lists.length).toBe(0);
   });
@@ -164,5 +168,4 @@
       }, 0);
     });
   });
-  });
+});
-})();

spec/javascripts/boards/list_spec.js.es6

@@ -17,12 +17,17 @@ describe('List model', () => {
   let list;
 
   beforeEach(() => {
+    Vue.http.interceptors.push(boardsMockInterceptor);
     gl.boardService = new BoardService('/test/issue-boards/board', '1');
     gl.issueBoards.BoardsStore.create();
 
     list = new List(listObj);
   });
 
+  afterEach(() => {
+    Vue.http.interceptors = _.without(Vue.http.interceptors, boardsMockInterceptor);
+  });
+
   it('gets issues when created', (done) => {
     setTimeout(() => {
       expect(list.issues.length).toBe(1);

spec/javascripts/boards/mock_data.js.es6

@@ -48,10 +48,10 @@ const BoardsMockData = {
   }
 };
 
-Vue.http.interceptors.push((request, next) => {
+const boardsMockInterceptor = (request, next) => {
   const body = BoardsMockData[request.method][request.url];
 
   next(request.respondWith(JSON.stringify(body), {
     status: 200
   }));
-});
+};