base/test/test_reg_util_win.cc

   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 #include "base/test/test_reg_util_win.h"
   6
   7 #include "base/guid.h"
   8 #include "base/logging.h"
   9 #include "base/strings/string_number_conversions.h"
  10 #include "base/strings/string_split.h"
  11 #include "base/strings/string_util.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14
  15 namespace registry_util {
  16
  17 namespace {
  18
  19 const wchar_t kTimestampDelimiter[] = L"$";
  20 const wchar_t kTempTestKeyPath[] = L"Software\\Chromium\\TempTestKeys";
  21
  22 void DeleteStaleTestKeys(const base::Time& now,
  23                          const base::string16& test_key_root) {
  24   base::win::RegKey test_root_key;
  25   if (test_root_key.Open(HKEY_CURRENT_USER,
  26                          test_key_root.c_str(),
  27                          KEY_ALL_ACCESS) != ERROR_SUCCESS) {
  28     // This will occur on first-run, but is harmless.
  29     return;
  30   }
  31
  32   base::win::RegistryKeyIterator iterator_test_root_key(HKEY_CURRENT_USER,
  33                                                         test_key_root.c_str());
  34   for (; iterator_test_root_key.Valid(); ++iterator_test_root_key) {
  35     base::string16 key_name = iterator_test_root_key.Name();
  36     std::vector<base::string16> tokens = base::SplitString(
  37         key_name, kTimestampDelimiter, base::KEEP_WHITESPACE,
  38         base::SPLIT_WANT_NONEMPTY);
  39     if (tokens.empty())
  40       continue;
  41     int64 key_name_as_number = 0;
  42
  43     if (!base::StringToInt64(tokens[0], &key_name_as_number)) {
  44       test_root_key.DeleteKey(key_name.c_str());
  45       continue;
  46     }
  47
  48     base::Time key_time = base::Time::FromInternalValue(key_name_as_number);
  49     base::TimeDelta age = now - key_time;
  50
  51     if (age > base::TimeDelta::FromHours(24))
  52       test_root_key.DeleteKey(key_name.c_str());
  53   }
  54 }
  55
  56 base::string16 GenerateTempKeyPath(const base::string16& test_key_root,
  57                                    const base::Time& timestamp) {
  58   base::string16 key_path = test_key_root;
  59   key_path += L"\\" + base::Int64ToString16(timestamp.ToInternalValue());
  60   key_path += kTimestampDelimiter + base::ASCIIToUTF16(base::GenerateGUID());
  61
  62   return key_path;
  63 }
  64
  65 }  // namespace
  66
  67 RegistryOverrideManager::ScopedRegistryKeyOverride::ScopedRegistryKeyOverride(
  68     HKEY override,
  69     const base::string16& key_path)
  70     : override_(override) {
  71   EXPECT_EQ(
  72       ERROR_SUCCESS,
  73       temp_key_.Create(HKEY_CURRENT_USER, key_path.c_str(), KEY_ALL_ACCESS));
  74   EXPECT_EQ(ERROR_SUCCESS,
  75             ::RegOverridePredefKey(override_, temp_key_.Handle()));
  76 }
  77
  78 RegistryOverrideManager::
  79     ScopedRegistryKeyOverride::~ScopedRegistryKeyOverride() {
  80   ::RegOverridePredefKey(override_, NULL);
  81   temp_key_.DeleteKey(L"");
  82 }
  83
  84 RegistryOverrideManager::RegistryOverrideManager()
  85     : timestamp_(base::Time::Now()), test_key_root_(kTempTestKeyPath) {
  86   DeleteStaleTestKeys(timestamp_, test_key_root_);
  87 }
  88
  89 RegistryOverrideManager::RegistryOverrideManager(
  90     const base::Time& timestamp,
  91     const base::string16& test_key_root)
  92     : timestamp_(timestamp), test_key_root_(test_key_root) {
  93   DeleteStaleTestKeys(timestamp_, test_key_root_);
  94 }
  95
  96 RegistryOverrideManager::~RegistryOverrideManager() {}
  97
  98 void RegistryOverrideManager::OverrideRegistry(HKEY override) {
  99   base::string16 key_path = GenerateTempKeyPath(test_key_root_, timestamp_);
 100   overrides_.push_back(new ScopedRegistryKeyOverride(override, key_path));
 101 }
 102
 103 base::string16 GenerateTempKeyPath() {
 104   return GenerateTempKeyPath(base::string16(kTempTestKeyPath),
 105                              base::Time::Now());
 106 }
 107
 108 }  // namespace registry_util