drive: Add DownloadOperationTest

chrome/browser/chromeos/drive/fake_free_disk_space_getter.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_FAKE_FREE_DISK_SPACE_GETTER_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FAKE_FREE_DISK_SPACE_GETTER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "chrome/browser/chromeos/drive/file_cache.h"
 
 namespace drive {
 
 // This class is used to report fake free disk space. In particular, this
 // class can be used to simulate a case where disk is full, or nearly full.
 class FakeFreeDiskSpaceGetter : public internal::FreeDiskSpaceGetterInterface {
  public:
   FakeFreeDiskSpaceGetter();
   virtual ~FakeFreeDiskSpaceGetter();
 
+  // Resets this instance.
+  void Reset();
+
   // If this function is not called, AmountOfFreeDiskSpace() will return 0
   // repeatedly.
   //
   // If this function is only called once, AmountOfFreeDiskSpace() will
   // return the fake value repeatedly.
   //
   // If this function is called multiple times, AmountOfFreeDiskSpace() will
   // return the fake values in the same order these values were recorded. The
   // last value will be returned repeatedly.
   void set_fake_free_disk_space(int64 fake_free_disk_space) {
     fake_values_.push_back(fake_free_disk_space);
   }
 
   // FreeDiskSpaceGetterInterface overrides.
   virtual int64 AmountOfFreeDiskSpace() OVERRIDE;
 
  private:
   std::vector<int64> fake_values_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeFreeDiskSpaceGetter);
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FAKE_FREE_DISK_SPACE_GETTER_H_