chrome/installer/util/registry_test_data.h

   1 // Copyright (c) 2011 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_INSTALLER_UTIL_REGISTRY_TEST_DATA_H_
   6 #define CHROME_INSTALLER_UTIL_REGISTRY_TEST_DATA_H_
   7
   8 #include <windows.h>
   9
  10 #include <string>
  11
  12 #include "base/basictypes.h"
  13
  14 // A helper class for use by unit tests that need some registry space and data.
  15 // BEWARE: Instances of this class irrevocably and recursively delete keys and
  16 // values from the registry.  Carefully read the comments for Initialize and
  17 // Reset before use.
  18 class RegistryTestData {
  19  public:
  20   RegistryTestData();
  21   // Invokes Reset() on its way out.
  22   ~RegistryTestData();
  23
  24   // Resets this instance, deletes the key rooted at |base_path|, and then
  25   // populates |base_path| with:
  26   // \EmptyKey
  27   // \NonEmptyKey (default value = "|base_path|\NonEmptyKey")
  28   // \NonEmptyKey\Subkey ("SomeValue" = DWORD 1)
  29   bool Initialize(HKEY root_key, const wchar_t* base_path);
  30
  31   // Deletes the key rooted at base_path and clears all state.
  32   void Reset();
  33
  34   // Fires Google Test expectations in the hopes that |path| contains the same
  35   // data as originally placed in |non_empty_key| by Initialize().
  36   void ExpectMatchesNonEmptyKey(HKEY root_key, const wchar_t* path);
  37
  38   HKEY root_key() const { return root_key_; }
  39   const std::wstring& base_path() const { return base_path_; }
  40   const std::wstring& empty_key_path() const { return empty_key_path_; }
  41   const std::wstring& non_empty_key_path() const { return non_empty_key_path_; }
  42
  43   // Fires Google Test expectations in the hopes that |path| is an empty key
  44   // (exists but has no values or subkeys).
  45   static void ExpectEmptyKey(HKEY root_key, const wchar_t* path);
  46
  47  private:
  48   static bool DeleteKey(HKEY root_key, const wchar_t* path);
  49
  50   HKEY root_key_;
  51   std::wstring base_path_;
  52   std::wstring empty_key_path_;
  53   std::wstring non_empty_key_path_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(RegistryTestData);
  56 };
  57
  58 #endif  // CHROME_INSTALLER_UTIL_REGISTRY_TEST_DATA_H_