Fix test false passes on unmocked requests

Update tests to always mock async method calls
with return values or stub them.

spec/frontend/mocks/ce/lib/utils/axios_utils.js

@@ -6,9 +6,10 @@ axios.isMock = true;
 axios.defaults.adapter = config => {
   const message =
     `Unexpected unmocked request: ${JSON.stringify(config, null, 2)}\n` +
-    'Consider using the `axios-mock-adapter` in tests.';
+    'Consider using the `axios-mock-adapter` module in tests.';
   const error = new Error(message);
   error.config = config;
+  global.fail(error);
   throw error;
 };
 

spec/frontend/mocks/mocks_helper_spec.js

-/* eslint-disable global-require, promise/catch-or-return */
+/* eslint-disable global-require */
 
 import path from 'path';
 
@@ -126,9 +126,8 @@ describe('mocks_helper.js', () => {
     it('survives jest.isolateModules()', done => {
       jest.isolateModules(() => {
         const axios2 = require('~/lib/utils/axios_utils').default;
-        expect(axios2.get('http://gitlab.com'))
-          .rejects.toThrow('Unexpected unmocked request')
-          .then(done);
+        expect(axios2.isMock).toBe(true);
+        done();
       });
     });
 

spec/frontend/mocks/node/jquery.js

@@ -4,9 +4,11 @@ const $ = jest.requireActual('jquery');
 
 // Fail tests for unmocked requests
 $.ajax = () => {
-  throw new Error(
+  const err = new Error(
     'Unexpected unmocked jQuery.ajax() call! Make sure to mock jQuery.ajax() in tests.',
   );
+  global.fail(err);
+  throw err;
 };
 
 // jquery is not an ES6 module

spec/frontend/mocks_spec.js

@@ -3,11 +3,22 @@ import axios from '~/lib/utils/axios_utils';
 
 describe('Mock auto-injection', () => {
   describe('mocks', () => {
-    it('~/lib/utils/axios_utils', () =>
-      expect(axios.get('http://gitlab.com')).rejects.toThrow('Unexpected unmocked request'));
+    let failMock;
+    beforeEach(() => {
+      failMock = jest.spyOn(global, 'fail').mockImplementation();
+    });
+
+    it('~/lib/utils/axios_utils', done => {
+      expect(axios.get('http://gitlab.com')).rejects.toThrow('Unexpected unmocked request');
+      setImmediate(() => {
+        expect(failMock).toHaveBeenCalledTimes(1);
+        done();
+      });
+    });
 
     it('jQuery.ajax()', () => {
       expect($.ajax).toThrow('Unexpected unmocked');
+      expect(failMock).toHaveBeenCalledTimes(1);
     });
   });
 });