Introduce drive::DummyFileSystem and rewrite some tests.

chrome/browser/chromeos/drive/dummy_file_system.h

Index: chrome/browser/chromeos/drive/dummy_file_system.h
diff --git a/chrome/browser/chromeos/drive/dummy_file_system.h b/chrome/browser/chromeos/drive/dummy_file_system.h
new file mode 100644
index 0000000000000000000000000000000000000000..799cb136ae4ebc9199644276744108bafb8b987f
--- /dev/null
+++ b/chrome/browser/chromeos/drive/dummy_file_system.h
@@ -0,0 +1,112 @@
+// 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_DRIVE_DUMMY_FILE_SYSTEM_H_
+#define CHROME_BROWSER_CHROMEOS_DRIVE_DUMMY_FILE_SYSTEM_H_
+
+#include "chrome/browser/chromeos/drive/file_system_interface.h"
+
+namespace drive {
+
+// Dummy implementation of FileSystemInterface. All functions do nothing.
+class DummyFileSystem : public FileSystemInterface {
+ public:
+  virtual ~DummyFileSystem() {}
+  virtual void Initialize() OVERRIDE {}
+  virtual void AddObserver(FileSystemObserver* observer) OVERRIDE {}
+  virtual void RemoveObserver(FileSystemObserver* observer) OVERRIDE {}
+  virtual void CheckForUpdates() OVERRIDE {}
+  virtual void GetResourceEntryById(
+      const std::string& resource_id,
+      const GetResourceEntryWithFilePathCallback& callback) OVERRIDE {}
+  virtual void TransferFileFromRemoteToLocal(
+      const base::FilePath& remote_src_file_path,
+      const base::FilePath& local_dest_file_path,
+      const FileOperationCallback& callback) OVERRIDE {}
+  virtual void TransferFileFromLocalToRemote(
+      const base::FilePath& local_src_file_path,
+      const base::FilePath& remote_dest_file_path,
+      const FileOperationCallback& callback) OVERRIDE {}
+  virtual void OpenFile(const base::FilePath& file_path,
+                        const OpenFileCallback& callback) OVERRIDE {}
+  virtual void CloseFile(const base::FilePath& file_path,
+                         const FileOperationCallback& callback) OVERRIDE {}
+  virtual void Copy(const base::FilePath& src_file_path,
+                    const base::FilePath& dest_file_path,
+                    const FileOperationCallback& callback) OVERRIDE {}
+  virtual void Move(const base::FilePath& src_file_path,
+                    const base::FilePath& dest_file_path,
+                    const FileOperationCallback& callback) OVERRIDE {}
+  virtual void Remove(const base::FilePath& file_path,
+                      bool is_recursive,
+                      const FileOperationCallback& callback) OVERRIDE {}
+  virtual void CreateDirectory(
+      const base::FilePath& directory_path,
+      bool is_exclusive,
+      bool is_recursive,
+      const FileOperationCallback& callback) OVERRIDE {}
+  virtual void CreateFile(const base::FilePath& file_path,
+                          bool is_exclusive,
+                          const FileOperationCallback& callback) OVERRIDE {}
+  virtual void TouchFile(const base::FilePath& file_path,
+                         const base::Time& last_access_time,
+                         const base::Time& last_modified_time,
+                         const FileOperationCallback& callback) OVERRIDE {}
+  virtual void Pin(const base::FilePath& file_path,
+                   const FileOperationCallback& callback) OVERRIDE {}
+  virtual void Unpin(const base::FilePath& file_path,
+                     const FileOperationCallback& callback) OVERRIDE {}
+  virtual void GetFileByPath(const base::FilePath& file_path,
+                             const GetFileCallback& callback) OVERRIDE {}
+  virtual void GetFileByResourceId(
+      const std::string& resource_id,
+      const DriveClientContext& context,
+      const GetFileCallback& get_file_callback,
+      const google_apis::GetContentCallback& get_content_callback) OVERRIDE {}
+  virtual void GetFileContentByPath(
+      const base::FilePath& file_path,
+      const GetFileContentInitializedCallback& initialized_callback,
+      const google_apis::GetContentCallback& get_content_callback,
+      const FileOperationCallback& completion_callback) OVERRIDE {}
+  virtual void UpdateFileByResourceId(
+      const std::string& resource_id,
+      const DriveClientContext& context,
+      const FileOperationCallback& callback) OVERRIDE {}
+  virtual void GetResourceEntryByPath(
+      const base::FilePath& file_path,
+      const GetResourceEntryCallback& callback) OVERRIDE {}
+  virtual void ReadDirectoryByPath(
+      const base::FilePath& file_path,
+      const ReadDirectoryWithSettingCallback& callback) OVERRIDE {}
+  virtual void RefreshDirectory(
+      const base::FilePath& file_path,
+      const FileOperationCallback& callback) OVERRIDE {}
+  virtual void Search(const std::string& search_query,
+                      const GURL& next_feed,
+                      const SearchCallback& callback) OVERRIDE {}
+  virtual void SearchMetadata(
+      const std::string& query,
+      int options,
+      int at_most_num_matches,
+      const SearchMetadataCallback& callback) OVERRIDE {}
+  virtual void GetAvailableSpace(
+      const GetAvailableSpaceCallback& callback) OVERRIDE {}
+  virtual void GetMetadata(
+      const GetFilesystemMetadataCallback& callback) OVERRIDE {}
+  virtual void MarkCacheFileAsMounted(
+      const base::FilePath& drive_file_path,
+      const OpenFileCallback& callback) OVERRIDE {}
+  virtual void MarkCacheFileAsUnmounted(
+      const base::FilePath& cache_file_path,
+      const FileOperationCallback& callback) OVERRIDE {}
+  virtual void GetCacheEntryByResourceId(
+      const std::string& resource_id,
+      const std::string& md5,
+      const GetCacheEntryCallback& callback) OVERRIDE {}
+  virtual void Reload() OVERRIDE {}
+};
+
+}  // namespace drive
+
+#endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DUMMY_FILE_SYSTEM_H_