Prototype implementation of MediaImportHandler.

chrome/test/data/file_manager/unit_tests/mocks/mock_volume_manager.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.
 
 /**
  * Mock class for VolumeManager.
  * @constructor
  */
 function MockVolumeManager() {
   this.volumeInfoList = new cr.ui.ArrayDataModel([]);
 
   this.volumeInfoList.push(MockVolumeManager.createMockVolumeInfo(
       VolumeManagerCommon.VolumeType.DRIVE, 'drive',
       str('DRIVE_DIRECTORY_LABEL')));
   this.volumeInfoList.push(MockVolumeManager.createMockVolumeInfo(
       VolumeManagerCommon.VolumeType.DOWNLOADS, 'downloads',
       str('DOWNLOADS_DIRECTORY_LABEL')));
 }
 
 /**
+ * @private {?VolumeManager}
+ */
+MockVolumeManager.instance_ = null;
+
+/**
+ * Replaces the VolumeManager singleton with a MockVolumeManager.
+ * @param {!MockVolumeManager=} opt_singleton
+ */
+MockVolumeManager.installMockSingleton = function(opt_singleton) {
+  MockVolumeManager.instance_ = opt_singleton || new MockVolumeManager();
+
+  VolumeManager.getInstance = function() {
+    return Promise.resolve(MockVolumeManager.instance_);
+  };
+};
+
+/**
  * Returns the corresponding VolumeInfo.
  *
  * @param {MockFileEntry} entry MockFileEntry pointing anywhere on a volume.
  * @return {VolumeInfo} Corresponding VolumeInfo.
  */
 MockVolumeManager.prototype.getVolumeInfo = function(entry) {
   for (var i = 0; i < this.volumeInfoList.length; i++) {
     if (this.volumeInfoList.item(i).volumeId === entry.volumeId)
       return this.volumeInfoList.item(i);
   }
@@ skipping 17 matching lines @@
     var volumeInfo = this.volumeInfoList.item(0);
     var isRootEntry = entry.fullPath === '/root';
     return new EntryLocation(volumeInfo, VolumeManagerCommon.RootType.DRIVE,
         isRootEntry, true);
   }
 
   throw new Error('Not implemented exception.');
 };
 
 /**
+ * @param {VolumeManagerCommon.VolumeType} volumeType Volume type.
+ * @return {VolumeInfo} Volume info.
+ */
+MockVolumeManager.prototype.getCurrentProfileVolumeInfo = function(volumeType) {
+  return VolumeManager.prototype.getCurrentProfileVolumeInfo.call(
+      this, volumeType);
+};
+
+/**
  * Utility function to create a mock VolumeInfo.
  * @param {VolumeType} type Volume type.
  * @param {string} volumeId Volume id.
  * @param {string} label Label.
  * @return {VolumeInfo} Created mock VolumeInfo.
  */
 MockVolumeManager.createMockVolumeInfo = function(type, volumeId, label) {
   var fileSystem = new MockFileSystem(volumeId, 'filesystem:' + volumeId);
   fileSystem.entries['/'] = new MockDirectoryEntry(fileSystem, '');
 
   var volumeInfo = new VolumeInfo(
       type,
       volumeId,
       fileSystem,
       '',     // error
       '',     // deviceType
       '',     // devicePath
       false,  // isReadonly
       {isCurrentProfile: true, displayName: ''},  // profile
       label,  // label
       '',     // extensionId
       false); // hasMedia
 
   return volumeInfo;
 };