Unit test for sync online wallpaper

chrome/test/data/chromeos/wallpaper_manager/unit_tests/event_page_unittest.js

+// Copyright 2014 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.
+'use strict';
+
+var mockController;
+
+function setUp() {
+  mockController = new MockController();
+  installMockXMLHttpRequest();
+}
+
+function tearDown() {
+  mockController.verifyMocks();
+  mockController.reset();
+  uninstallMockXMLHttpRequest();
+}
+
+// Test sync online wallpaper. When the synced wallpaper info is not the same as
+// the local wallpaper info, wallpaper should set to the synced one.
+function testSyncOnlineWallpaper() {
+  // Setup sync value.
+  var changes = {};
+  changes[Constants.AccessSyncWallpaperInfoKey] = {};
+  changes[Constants.AccessSyncWallpaperInfoKey].newValue = {
+    'url': TestConstants.wallpaperURL,
+    'layout': 'custom',
+    'source': Constants.WallpaperSourceEnum.Online
+  };
+
+  chrome.wallpaperPrivate = {};
+  var mockSetWallpaperIfExists = mockController.createFunctionMock(
+      chrome.wallpaperPrivate, 'setWallpaperIfExists');
+  mockSetWallpaperIfExists.addExpectation(
+      changes[Constants.AccessSyncWallpaperInfoKey].newValue.url,
+      changes[Constants.AccessSyncWallpaperInfoKey].newValue.layout);
+  mockSetWallpaperIfExists.callbackData = [false];
+
+  var mockSetWallpaper = mockController.createFunctionMock(
+      chrome.wallpaperPrivate, 'setWallpaper');
+  mockSetWallpaper.addExpectation(
+      TestConstants.image,
+      changes[Constants.AccessSyncWallpaperInfoKey].newValue.layout,
+      changes[Constants.AccessSyncWallpaperInfoKey].newValue.url);
+
+  chrome.storage.onChanged.dispatch(changes);
+}