Make FileTaskExecutor testable.

chrome/browser/chromeos/drive/file_task_executor.h

 // Copyright (c) 2012 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_FILE_TASK_EXECUTOR_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_TASK_EXECUTOR_H_
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/drive/file_errors.h"
 #include "chrome/browser/chromeos/file_manager/file_tasks.h"
 #include "google_apis/drive/gdata_errorcode.h"
 
 namespace drive {
 
+class DriveServiceInterface;
+class FileSystemInterface;
 class ResourceEntry;
 
+// Delegate class for hooking fake instances and behaviors for testing.
+class FileTaskExecutorDelegate {
+ public:
+  virtual ~FileTaskExecutorDelegate() {}
+
+  virtual FileSystemInterface* GetFileSystem() = 0;
+  virtual DriveServiceInterface* GetDriveService() = 0;
+  virtual void OpenBrowserWindow(const GURL& open_link) = 0;
+};
+
 // This class implements an "executor" class that will execute tasks for
 // third party Drive apps that store data in Drive itself.  To do that, it
 // needs to find the file resource IDs and pass them to a server-side function
 // that will authorize the app to open the given document and return a URL
 // for opening the document in that app directly.
 class FileTaskExecutor {
  public:
+  // Creates FileTaskExecutor with delegate derived from |profile|. Used in
+  // product environment.
   FileTaskExecutor(Profile* profile, const std::string& app_id);
 
+  // Creates FileTaskExecutor with a specific delegate.
+  FileTaskExecutor(scoped_ptr<FileTaskExecutorDelegate> delegate,
+                   const std::string& app_id);
+
   // Executes file tasks, runs |done| and deletes |this|.
-  void Execute(
-      const std::vector<fileapi::FileSystemURL>& file_urls,
-      const file_manager::file_tasks::FileTaskFinishedCallback& done);
+  void Execute(const std::vector<fileapi::FileSystemURL>& file_urls,
+               const file_manager::file_tasks::FileTaskFinishedCallback& done);
 
  private:
   ~FileTaskExecutor();
 
   void OnFileEntryFetched(FileError error, scoped_ptr<ResourceEntry> entry);
   void OnAppAuthorized(const std::string& resource_id,
                        google_apis::GDataErrorCode error,
                        const GURL& open_link);
 
   // Calls |done_| with |success| status and deletes |this|.
   void Done(bool success);
 
-  Profile* profile_;
+  scoped_ptr<FileTaskExecutorDelegate> delegate_;
   std::string app_id_;
   int current_index_;
   file_manager::file_tasks::FileTaskFinishedCallback done_;
 
   base::WeakPtrFactory<FileTaskExecutor> weak_ptr_factory_;
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_TASK_EXECUTOR_H_