Add rollback support to DeleteRegKeyWorkItem....

chrome/installer/util/delete_reg_key_work_item_unittest.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <windows.h>
+#include <atlsecurity.h>  // NOLINT
+#include "base/logging.h"
+#include "base/scoped_ptr.h"
+#include "base/win/registry.h"
+#include "chrome/installer/util/delete_reg_key_work_item.h"
+#include "chrome/installer/util/work_item.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using base::win::RegKey;
+
+namespace {
+wchar_t test_root[] = L"SOFTWARE\\TmpTmp";
+}
+
+class DeleteRegKeyWorkItemTest : public testing::Test {
+ protected:
+  virtual void SetUp() {
+    // Create a temporary key for testing
+    RegKey key(HKEY_CURRENT_USER, L"", KEY_ALL_ACCESS);
+    key.DeleteKey(test_root);
+    ASSERT_NE(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, test_root, KEY_READ));
+    ASSERT_EQ(ERROR_SUCCESS, key.Create(HKEY_CURRENT_USER, test_root,
+                                        KEY_READ));
+  }
+
+  virtual void TearDown() {
+    logging::CloseLogFile();
+    // Clean up the temporary key
+    RegKey key(HKEY_CURRENT_USER, L"", KEY_ALL_ACCESS);
+    ASSERT_EQ(ERROR_SUCCESS, key.DeleteKey(test_root));
+  }
+};
+
+// Test that deleting a key that doesn't exist succeeds, and that rollback does
+// nothing.
+TEST_F(DeleteRegKeyWorkItemTest, TestNoKey) {
+  RegKey key;
+  std::wstring key_name(std::wstring(test_root) + L"\\NoKeyHere");
+  EXPECT_NE(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_READ));
+  scoped_ptr<DeleteRegKeyWorkItem> item(
+      WorkItem::CreateDeleteRegKeyWorkItem(HKEY_CURRENT_USER, key_name));
+  EXPECT_TRUE(item->Do());
+  EXPECT_NE(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_READ));
+  item->Rollback();
+  item.reset();
+  EXPECT_NE(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_READ));
+}
+
+// Test that deleting a subkey of a key that doesn't exist succeeds, and that
+// rollback does nothing.
+TEST_F(DeleteRegKeyWorkItemTest, TestNoSubkey) {
+  RegKey key;
+  std::wstring key_name(std::wstring(test_root) + L"\\NoKeyHere\\OrHere");
+  EXPECT_NE(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_READ));
+  scoped_ptr<DeleteRegKeyWorkItem> item(
+      WorkItem::CreateDeleteRegKeyWorkItem(HKEY_CURRENT_USER, key_name));
+  EXPECT_TRUE(item->Do());
+  EXPECT_NE(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_READ));
+  item->Rollback();
+  item.reset();
+  EXPECT_NE(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_READ));
+}
+
+// Test that deleting an empty key succeeds, and that rollback brings it back.
+TEST_F(DeleteRegKeyWorkItemTest, TestEmptyKey) {
+  RegKey key;
+  std::wstring key_name(std::wstring(test_root) + L"\\EmptyKey");
+  EXPECT_EQ(ERROR_SUCCESS, key.Create(HKEY_CURRENT_USER, key_name.c_str(),
+                                      KEY_WRITE));
+  key.Close();
+  scoped_ptr<DeleteRegKeyWorkItem> item(
+      WorkItem::CreateDeleteRegKeyWorkItem(HKEY_CURRENT_USER, key_name));
+  EXPECT_TRUE(item->Do());
+  EXPECT_NE(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_READ));
+  item->Rollback();
+  item.reset();
+  EXPECT_EQ(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_READ));
+}
+
+// Test that deleting a key with subkeys and values succeeds, and that rollback
+// brings them all back.
+TEST_F(DeleteRegKeyWorkItemTest, TestNonEmptyKey) {
+  RegKey key;
+  std::wstring key_name(std::wstring(test_root) + L"\\NonEmptyKey");
+  EXPECT_EQ(ERROR_SUCCESS, key.Create(HKEY_CURRENT_USER, key_name.c_str(),
+                                      KEY_WRITE));
+  EXPECT_EQ(ERROR_SUCCESS, key.WriteValue(NULL, key_name.c_str()));
+  EXPECT_EQ(ERROR_SUCCESS, key.CreateKey(L"Subkey", KEY_WRITE));
+  EXPECT_EQ(ERROR_SUCCESS, key.WriteValue(L"SomeValue", 1U));
+  key.Close();
+  scoped_ptr<DeleteRegKeyWorkItem> item(
+      WorkItem::CreateDeleteRegKeyWorkItem(HKEY_CURRENT_USER, key_name));
+  EXPECT_TRUE(item->Do());
+  EXPECT_NE(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_READ));
+  item->Rollback();
+  item.reset();
+  EXPECT_EQ(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_READ));
+  std::wstring str_value;
+  EXPECT_EQ(ERROR_SUCCESS, key.ReadValue(NULL, &str_value));
+  EXPECT_EQ(key_name, str_value);
+  EXPECT_EQ(ERROR_SUCCESS, key.OpenKey(L"Subkey", KEY_READ));
+  DWORD dw_value = 0;
+  EXPECT_EQ(ERROR_SUCCESS, key.ReadValueDW(L"SomeValue", &dw_value));
+  EXPECT_EQ(1U, dw_value);
+}
+
+// Test that deleting a key with subkeys we can't delete fails, and that
+// everything is there after rollback.
+TEST_F(DeleteRegKeyWorkItemTest, TestUndeletableKey) {
+  RegKey key;
+  std::wstring key_name(std::wstring(test_root) + L"\\UndeletableKey");
+  EXPECT_EQ(ERROR_SUCCESS, key.Create(HKEY_CURRENT_USER, key_name.c_str(),
+                                      KEY_WRITE));
+  EXPECT_EQ(ERROR_SUCCESS, key.WriteValue(NULL, key_name.c_str()));
+  DWORD dw_value = 1;
+  RegKey subkey;
+  RegKey subkey2;
+  EXPECT_EQ(ERROR_SUCCESS, subkey.Create(key.Handle(), L"Subkey",
+                                         KEY_WRITE | WRITE_DAC));
+  EXPECT_EQ(ERROR_SUCCESS, subkey.WriteValue(L"SomeValue", 1U));
+  EXPECT_EQ(ERROR_SUCCESS, subkey2.Create(subkey.Handle(), L"Subkey2",
+                                          KEY_WRITE | WRITE_DAC));
+  EXPECT_EQ(ERROR_SUCCESS, subkey2.WriteValue(L"", 2U));
+  CSecurityDesc sec_desc;
+  sec_desc.FromString(L"D:PAI(A;OICI;KR;;;BU)");  // builtin users read
+  EXPECT_EQ(ERROR_SUCCESS,
+            RegSetKeySecurity(subkey.Handle(), DACL_SECURITY_INFORMATION,
+                              const_cast<SECURITY_DESCRIPTOR*>(
+                                  sec_desc.GetPSECURITY_DESCRIPTOR())));
+  sec_desc.FromString(L"D:PAI(A;OICI;KA;;;BU)");  // builtin users all access
+  EXPECT_EQ(ERROR_SUCCESS,
+            RegSetKeySecurity(subkey2.Handle(), DACL_SECURITY_INFORMATION,
+                              const_cast<SECURITY_DESCRIPTOR*>(
+                                  sec_desc.GetPSECURITY_DESCRIPTOR())));
+  subkey2.Close();
+  subkey.Close();
+  key.Close();
+  scoped_ptr<DeleteRegKeyWorkItem> item(
+      WorkItem::CreateDeleteRegKeyWorkItem(HKEY_CURRENT_USER, key_name));
+  EXPECT_FALSE(item->Do());
+  EXPECT_EQ(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_QUERY_VALUE));
+  item->Rollback();
+  item.reset();
+  EXPECT_EQ(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, key_name.c_str(),
+                                    KEY_QUERY_VALUE));
+  std::wstring str_value;
+  EXPECT_EQ(ERROR_SUCCESS, key.ReadValue(NULL, &str_value));
+  EXPECT_EQ(key_name, str_value);
+  EXPECT_EQ(ERROR_SUCCESS, key.OpenKey(L"Subkey", KEY_READ | WRITE_DAC));
+  dw_value = 0;
+  EXPECT_EQ(ERROR_SUCCESS, key.ReadValueDW(L"SomeValue", &dw_value));
+  EXPECT_EQ(1U, dw_value);
+  // Give users all access to the subkey so it can be deleted.
+  EXPECT_EQ(ERROR_SUCCESS,
+      RegSetKeySecurity(key.Handle(), DACL_SECURITY_INFORMATION,
+                        const_cast<SECURITY_DESCRIPTOR*>(
+                            sec_desc.GetPSECURITY_DESCRIPTOR())));
+  EXPECT_EQ(ERROR_SUCCESS, key.OpenKey(L"Subkey2", KEY_QUERY_VALUE));
+  EXPECT_EQ(ERROR_SUCCESS, key.ReadValueDW(L"", &dw_value));
+  EXPECT_EQ(2U, dw_value);
+}