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