chrome/browser/chromeos/login/users/scoped_user_manager_enabler.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_USERS_SCOPED_USER_MANAGER_ENABLER_H_
   6 #define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_SCOPED_USER_MANAGER_ENABLER_H_
   7
   8 #include "base/basictypes.h"
   9
  10 namespace user_manager {
  11 class UserManager;
  12 }
  13
  14 namespace chromeos {
  15
  16 // Helper class for unit tests. Initializes the UserManager singleton to the
  17 // given |user_manager| and tears it down again on destruction. If the singleton
  18 // had already been initialized, its previous value is restored after tearing
  19 // down |user_manager|.
  20 class ScopedUserManagerEnabler {
  21  public:
  22   // Takes ownership of |user_manager|.
  23   explicit ScopedUserManagerEnabler(user_manager::UserManager* user_manager);
  24   ~ScopedUserManagerEnabler();
  25
  26  private:
  27   user_manager::UserManager* previous_user_manager_;
  28
  29   DISALLOW_COPY_AND_ASSIGN(ScopedUserManagerEnabler);
  30 };
  31
  32 }  // namespace chromeos
  33
  34 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_SCOPED_USER_MANAGER_ENABLER_H_