Add unit tests for drive::FileTaskExecutor.

chrome/browser/drive/fake_drive_service.cc

 // 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.
 
 #include "chrome/browser/drive/fake_drive_service.h"
 
 #include <string>
 
 #include "base/file_util.h"
 #include "base/json/json_string_value_serializer.h"
@@ skipping 1150 matching lines @@
       new FileResource(*file)));
   return CancelCallback();
 }
 
 CancelCallback FakeDriveService::AuthorizeApp(
     const std::string& resource_id,
     const std::string& app_id,
     const AuthorizeAppCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!callback.is_null());
+
+  if (entries_.count(resource_id) == 0) {
+    callback.Run(google_apis::HTTP_NOT_FOUND, GURL());
+    return CancelCallback();
+  }
+
+  callback.Run(HTTP_SUCCESS,
+               GURL(base::StringPrintf(open_url_format_.c_str(),
+                                       resource_id.c_str(),
+                                       app_id.c_str())));
   return CancelCallback();
 }
 
 CancelCallback FakeDriveService::UninstallApp(
     const std::string& app_id,
     const google_apis::EntryActionCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!callback.is_null());
 
   // Find app_id from app_info_value_ and delete.
@@ skipping 387 matching lines @@
     google_apis::drive::PermissionRole role,
     const google_apis::EntryActionCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!callback.is_null());
 
   NOTREACHED();
   return CancelCallback();
 }
 
 }  // namespace drive