Unit tests for utility.js

chrome/browser/resources/google_now/background_test_util.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Mocks for globals needed for loading background.js.
 
-function emptyMock() {}
-
 var wrapper = {instrumentChromeApiFunction: emptyMock};
 
 function buildTaskManager() {
   return {debugSetStepName: emptyMock};
 }
 
 function buildAuthenticationManager() {
   return {
     addListener: emptyMock
   };
 }
 
 var instrumentApiFunction = emptyMock;
 var buildAttemptManager = emptyMock;
 var buildCardSet = emptyMock;
-var emptyListener = {addListener: emptyMock};
+
 var instrumented = {};
-instrumented['location'] = {onLocationUpdate: emptyListener};
-instrumented['notifications'] = {
-  onButtonClicked: emptyListener,
-  onClicked: emptyListener,
-  onClosed: emptyListener
-};
-instrumented['omnibox'] = {onInputEntered: emptyListener};
-instrumented['preferencesPrivate'] = {
-  googleGeolocationAccessEnabled: {
-    onChange: emptyListener
-  }
-};
-instrumented['runtime'] = {
-  onInstalled: emptyListener,
-  onStartup: emptyListener
-};
+mockChromeEvent(instrumented, 'location.onLocationUpdate');
+mockChromeEvent(instrumented, 'notifications.onButtonClicked');
+mockChromeEvent(instrumented, 'notifications.onClicked');
+mockChromeEvent(instrumented, 'notifications.onClosed');
+mockChromeEvent(instrumented, 'omnibox.onInputEntered');
+mockChromeEvent(
+    instrumented, 'preferencesPrivate.googleGeolocationAccessEnabled.onChange');
+mockChromeEvent(instrumented, 'runtime.onInstalled');
+mockChromeEvent(instrumented, 'runtime.onStartup');