fixed assignee_select_spec.js

spec/javascripts/boards/components/assignee_select_spec.js

 /* global BoardService */
-
+import MockAdapter from 'axios-mock-adapter';
 import Vue from 'vue';
+import axios from '~/lib/utils/axios_utils';
 import AssigneeSelect from '~/boards/components/assignee_select.vue';
 import '~/boards/services/board_service';
 import '~/boards/stores/boards_store';
@@ -86,12 +87,18 @@ describe('Assignee select component', () => {
     });
 
     describe('clicking dropdown items', () => {
+      let mock;
+
       beforeEach(() => {
-        const deferred = new jQuery.Deferred();
-        spyOn($, 'ajax').and.returnValue(deferred.resolve([
+        mock = new MockAdapter(axios);
+        mock.onGet('/autocomplete/users.json').reply(200, [
           assignee,
           assignee2,
-        ]));
+        ]);
+      });
+
+      afterEach(() => {
+        mock.restore();
       });
 
       it('sets assignee', (done) => {
@@ -99,7 +106,6 @@ describe('Assignee select component', () => {
 
         setTimeout(() => {
           vm.$el.querySelectorAll('li a')[2].click();
-        });
 
           setTimeout(() => {
             expect(activeDropdownItem(0)).toEqual('second assignee');
@@ -109,4 +115,5 @@ describe('Assignee select component', () => {
         });
       });
     });
+  });
 });