1// Copyright (c) 2013 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_COMMON_IMPORTER_IE_IMPORTER_TEST_REGISTRY_OVERRIDER_WIN_H_
6#define CHROME_COMMON_IMPORTER_IE_IMPORTER_TEST_REGISTRY_OVERRIDER_WIN_H_
7
8#include "base/basictypes.h"
9#include "base/strings/string16.h"
10
11// A helper class to let tests generate a random registry key to be used in
12// HKEY_CURRENT_USER in tests. After the key has been generated by constructing
13// an IEImporterTestRegistryOverrider, consumers in this process (or in any
14// child processes created after the key has been generated) can obtain the key
15// via GetTestRegistryOverride(). IEImporterTestRegistryOverrider will delete
16// the temporary key upon being deleted itself. Only one
17// IEImporterTestRegistryOverrider should live at once in a given process
18// hiearchy.
19class IEImporterTestRegistryOverrider {
20 public:
21  IEImporterTestRegistryOverrider();
22  ~IEImporterTestRegistryOverrider();
23
24  // Returns a test key if one was chosen and set by a call to
25  // SetTestRegistryOverride(); returns the empty string if none.
26  static base::string16 GetTestRegistryOverride();
27
28 private:
29  base::string16 temporary_key_;
30
31  DISALLOW_COPY_AND_ASSIGN(IEImporterTestRegistryOverrider);
32};
33
34#endif  // CHROME_COMMON_IMPORTER_IE_IMPORTER_TEST_REGISTRY_OVERRIDER_WIN_H_
35