chromium/components/user_manager/scoped_user_manager.h

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_USER_MANAGER_SCOPED_USER_MANAGER_H_
#define COMPONENTS_USER_MANAGER_SCOPED_USER_MANAGER_H_

#include <memory>
#include <utility>

#include "base/memory/raw_ptr.h"
#include "components/user_manager/user_manager_export.h"

namespace user_manager {

class UserManager;

namespace internal {

// Implementation details of ScopedUserManager.
class USER_MANAGER_EXPORT ScopedUserManagerImpl { … };

}  // namespace internal

// Helper class for unit tests. Initializes the UserManager singleton to the
// given UserManager and tears it down again on destruction. If the singleton
// had already been initialized, its previous value is restored after tearing
// down.
//
// Example use case.
//   class FooTest : public testing::Test {
//    public:
//     void SetUp() override {
//       fake_user_manager_.Reset(std::make_unique<FakeUserManager>());
//       fake_user_manager_->AddUser(...);
//       ...
//     }
//    private:
//     TypedScopedUserManager<FakeUserManager> fake_user_manager_;
//   };
//
template <typename T>
class USER_MANAGER_EXPORT TypedScopedUserManager { … };

ScopedUserManager;

}  // namespace user_manager

#endif  // COMPONENTS_USER_MANAGER_SCOPED_USER_MANAGER_H_