// Copyright 2003-2009 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========================================================================

#include <ATLComTime.h>
#include <atltypes.h>
#include <atlwin.h>
#include <map>
#include <vector>
#include "omaha/common/app_util.h"
#include "omaha/common/constants.h"
#include "omaha/common/dynamic_link_kernel32.h"
#include "omaha/common/file.h"
#include "omaha/common/module_utils.h"
#include "omaha/common/path.h"
#include "omaha/common/shell.h"
#include "omaha/common/string.h"
#include "omaha/common/time.h"
#include "omaha/common/utils.h"
#include "omaha/common/scoped_any.h"
#include "omaha/common/system_info.h"
#include "omaha/common/vistautil.h"
#include "omaha/testing/unit_test.h"

namespace omaha {

// Make sure that the time functions work.
TEST(UtilsTest, Time) {
  // TODO(omaha): - add a test from string to time and back again.
  // Further test the time converters.
  time64 now = GetCurrent100NSTime();
  ASSERT_TRUE(StringToTime(TimeToString(now)) == now);

  // Test GetTimeCategory.
  ASSERT_EQ(PAST,
            GetTimeCategory(static_cast<time64>(0)));
  ASSERT_EQ(PRESENT,
            GetTimeCategory(static_cast<time64>(now)));
  ASSERT_EQ(PRESENT,
            GetTimeCategory(static_cast<time64>(now - kDaysTo100ns)));
  ASSERT_EQ(PRESENT,
            GetTimeCategory(static_cast<time64>(now - 365 * kDaysTo100ns)));
  // A little bit in the future is also considered present.
  ASSERT_EQ(PRESENT,
            GetTimeCategory(static_cast<time64>(now + kDaysTo100ns)));
  ASSERT_EQ(PRESENT,
            GetTimeCategory(static_cast<time64>(
                now - 30 * 365 * kDaysTo100ns)));
  ASSERT_EQ(PAST,
            GetTimeCategory(static_cast<time64>(
                now - 50 * 365 * kDaysTo100ns)));
  ASSERT_EQ(FUTURE,
            GetTimeCategory(static_cast<time64>(now + kDaysTo100ns * 6)));
  ASSERT_EQ(FUTURE,
            GetTimeCategory(static_cast<time64>(now + 365 * kDaysTo100ns)));

  // Test IsValidTime.
  ASSERT_FALSE(IsValidTime(static_cast<time64>(0)));
  ASSERT_TRUE(IsValidTime(static_cast<time64>(now)));
  ASSERT_TRUE(IsValidTime(static_cast<time64>(now - 365 * kDaysTo100ns)));
  ASSERT_TRUE(IsValidTime(static_cast<time64>(now - 10 * 365 * kDaysTo100ns)));
  ASSERT_TRUE(IsValidTime(static_cast<time64>(now + kDaysTo100ns)));
  ASSERT_FALSE(IsValidTime(static_cast<time64>(now - 50 * 365 * kDaysTo100ns)));
  ASSERT_FALSE(IsValidTime(static_cast<time64>(now + 50 * 365 * kDaysTo100ns)));
  ASSERT_FALSE(IsValidTime(static_cast<time64>(now + kDaysTo100ns * 6)));
}

TEST(UtilsTest, GetFolderPath_Success) {
  CString path;
  EXPECT_SUCCEEDED(GetFolderPath(CSIDL_PROGRAM_FILES, &path));
  BOOL isWow64 = FALSE;
  EXPECT_SUCCEEDED(Kernel32::IsWow64Process(GetCurrentProcess(), &isWow64));
  CString expected_path = isWow64 ?
      _T("C:\\Program Files (x86)") : _T("C:\\Program Files");
  EXPECT_STREQ(expected_path, path);
}

TEST(UtilsTest, GetFolderPath_Errors) {
  CString path;
  EXPECT_EQ(E_INVALIDARG, GetFolderPath(0x7fff, &path));
  EXPECT_TRUE(path.IsEmpty());
  EXPECT_EQ(E_INVALIDARG, GetFolderPath(CSIDL_PROGRAM_FILES, NULL));
}

TEST(UtilsTest, CallEntryPoint0) {
  HRESULT hr(E_FAIL);
  ASSERT_FAILED(CallEntryPoint0(L"random-nonsense.dll", "foobar", &hr));
}

TEST(UtilsTest, ReadEntireFile) {
  TCHAR directory[MAX_PATH] = {0};
  ASSERT_TRUE(GetModuleDirectory(NULL, directory));
  CString file_name;
  file_name.AppendFormat(_T("%s\\declaration.txt"), directory);

  std::vector<byte> buffer;
  ASSERT_FAILED(ReadEntireFile(L"C:\\F00Bar\\ImaginaryFile", 0, &buffer));

  ASSERT_SUCCEEDED(ReadEntireFile(file_name, 0, &buffer));
  ASSERT_EQ(9405, buffer.size());
  buffer.resize(0);
  ASSERT_FAILED(ReadEntireFile(L"C:\\WINDOWS\\Greenstone.bmp", 1000, &buffer));
}

// TODO(omaha): Need a test for WriteEntireFile
// TEST(UtilsTest, WriteEntireFile) {
// }

TEST(UtilsTest, RegSplitKeyvalueName) {
  CString key_name, value_name;
  ASSERT_SUCCEEDED(RegSplitKeyvalueName(CString(L"HKLM\\Foo\\"),
                                        &key_name,
                                        &value_name));
  ASSERT_STREQ(key_name, L"HKLM\\Foo");
  ASSERT_TRUE(value_name.IsEmpty());

  ASSERT_SUCCEEDED(RegSplitKeyvalueName(CString(L"HKLM\\Foo\\(default)"),
                                        &key_name,
                                        &value_name));
  ASSERT_STREQ(key_name, L"HKLM\\Foo");
  ASSERT_TRUE(value_name.IsEmpty());

  ASSERT_SUCCEEDED(RegSplitKeyvalueName(CString(L"HKLM\\Foo\\Bar"),
                                        &key_name,
                                        &value_name));
  ASSERT_STREQ(key_name, L"HKLM\\Foo");
  ASSERT_STREQ(value_name, L"Bar");
}

TEST(UtilsTest, ExpandEnvLikeStrings) {
  std::map<CString, CString> mapping;
  ASSERT_SUCCEEDED(Shell::GetSpecialFolderKeywordsMapping(&mapping));

  CString out;
  ASSERT_SUCCEEDED(ExpandEnvLikeStrings(
      L"Foo%WINDOWS%Bar%SYSTEM%Zebra%WINDOWS%%SYSTEM%", mapping, &out));

  // This should work, but CmpHelperSTRCASEEQ is not overloaded for wchars.
  // ASSERT_STRCASEEQ(out, L"FooC:\\WINDOWSBarC:\\WINDOWS\\system32Zebra"
  //                       L"C:\\WINDOWSC:\\WINDOWS\\system32");
  ASSERT_EQ(out.CompareNoCase(L"FooC:\\WINDOWSBarC:\\WINDOWS\\system32Zebra"
                              L"C:\\WINDOWSC:\\WINDOWS\\system32"),
            0);
  ASSERT_FAILED(ExpandEnvLikeStrings(L"Foo%WINDOWS%%BAR%Zebra", mapping, &out));
}

TEST(UtilsTest, GetCurrentProcessHandle) {
  scoped_process proc;
  ASSERT_SUCCEEDED(GetCurrentProcessHandle(address(proc)));
  ASSERT_TRUE(valid(proc));
}

TEST(UtilsTest, IsGuid) {
  ASSERT_FALSE(IsGuid(NULL));
  ASSERT_FALSE(IsGuid(_T("")));
  ASSERT_FALSE(IsGuid(_T("{}")));
  ASSERT_FALSE(IsGuid(_T("a")));
  ASSERT_FALSE(IsGuid(_T("CA3045BFA6B14fb8A0EFA615CEFE452C")));

  // Missing {}
  ASSERT_FALSE(IsGuid(_T("CA3045BF-A6B1-4fb8-A0EF-A615CEFE452C")));

  // Invalid char X
  ASSERT_FALSE(IsGuid(_T("{XA3045BF-A6B1-4fb8-A0EF-A615CEFE452C}")));

  // Invalid binary char 0x200
  ASSERT_FALSE(IsGuid(_T("{\0x200a3045bf-a6b1-4fb8-a0ef-a615cefe452c}")));

  // Missing -
  ASSERT_FALSE(IsGuid(_T("{CA3045BFA6B14fb8A0EFA615CEFE452C}")));

  // Double quotes
  ASSERT_FALSE(IsGuid(_T("\"{ca3045bf-a6b1-4fb8-a0ef-a615cefe452c}\"")));

  ASSERT_TRUE(IsGuid(_T("{00000000-0000-0000-0000-000000000000}")));
  ASSERT_TRUE(IsGuid(_T("{CA3045BF-A6B1-4fb8-A0EF-A615CEFE452C}")));
  ASSERT_TRUE(IsGuid(_T("{ca3045bf-a6b1-4fb8-a0ef-a615cefe452c}")));
}

TEST(UtilsTest, VersionFromString_ValidVersion) {
  EXPECT_EQ(MAKEDLLVERULL(42, 1, 21, 12345),
            VersionFromString(_T("42.1.21.12345")));
}

TEST(UtilsTest, VersionFromString_VersionZero) {
  EXPECT_EQ(0, VersionFromString(_T("0.0.0.0")));
}

TEST(UtilsTest, VersionFromString_VersionUpperLimits) {
  EXPECT_EQ(MAKEDLLVERULL(0xffff, 0xffff, 0xffff, 0xffff),
            VersionFromString(_T("65535.65535.65535.65535")));
  EXPECT_EQ(0, VersionFromString(_T("65536.65536.65536.65536")));
  EXPECT_EQ(0, VersionFromString(_T("1.2.65536.65536")));
}

TEST(UtilsTest, VersionFromString_IntegerOverflow) {
  EXPECT_EQ(0, VersionFromString(_T("1.2.3.4294967296")));
}

TEST(UtilsTest, VersionFromString_NegativeVersion) {
  EXPECT_EQ(0, VersionFromString(_T("1.2.3.-22")));
}

TEST(UtilsTest, VersionFromString_TooFewElements) {
  EXPECT_EQ(0, VersionFromString(_T("1.1.1")));
}

TEST(UtilsTest, VersionFromString_ExtraPeriod) {
  EXPECT_EQ(0, VersionFromString(_T("1.1.2.3.")));
}

TEST(UtilsTest, VersionFromString_TooManyElements) {
  EXPECT_EQ(0, VersionFromString(_T("1.1.2.3.4")));
}

TEST(UtilsTest, VersionFromString_Char) {
  EXPECT_EQ(0, VersionFromString(_T("1.B.3.4")));
  EXPECT_EQ(0, VersionFromString(_T("1.2.3.B")));
  EXPECT_EQ(0, VersionFromString(_T("1.2.3.9B")));
}

TEST(UtilsTest, StringFromVersion_ValidVersion) {
  EXPECT_STREQ(_T("42.1.21.12345"),
               StringFromVersion(MAKEDLLVERULL(42, 1, 21, 12345)));
}

TEST(UtilsTest, StringFromVersion_VersionZero) {
  EXPECT_STREQ(_T("0.0.0.0"), StringFromVersion(0));
}

TEST(UtilsTest, StringFromVersion_VersionUpperLimits) {
  EXPECT_STREQ(
      _T("65535.65535.65535.65535"),
      StringFromVersion(MAKEDLLVERULL(0xffff, 0xffff, 0xffff, 0xffff)));
}

TEST(UtilsTest, IsLocalSystemSid) {
  EXPECT_TRUE(IsLocalSystemSid(kLocalSystemSid));
  EXPECT_TRUE(IsLocalSystemSid(_T("S-1-5-18")));
  EXPECT_TRUE(IsLocalSystemSid(_T("s-1-5-18")));

  EXPECT_FALSE(IsLocalSystemSid(_T("")));
  EXPECT_FALSE(IsLocalSystemSid(_T("S-1-5-17")));
}

// There is a very small probability the test could fail.
TEST(UtilsTest, GenRandom) {
  int random_int = 0;
  EXPECT_TRUE(GenRandom(&random_int, sizeof(random_int)));
  EXPECT_NE(random_int, 0);

  int another_random_int = 0;
  EXPECT_TRUE(GenRandom(&another_random_int, sizeof(another_random_int)));
  EXPECT_NE(another_random_int, 0);

  EXPECT_NE(random_int, another_random_int);
}

// Counts instances of the class.
class Counter {
 public:
  Counter() {
    ++instance_count_;
  }
  ~Counter() {
    --instance_count_;
  }
  static int instance_count() { return instance_count_; }
 private:
  static int instance_count_;
  DISALLOW_EVIL_CONSTRUCTORS(Counter);
};

int Counter::instance_count_ = 0;

// Checks if the functor is actually calling the destructor of the type.
TEST(UtilsTest, DeleteFun) {
  EXPECT_EQ(Counter::instance_count(), 0);
  Counter* counter = new Counter;
  EXPECT_EQ(Counter::instance_count(), 1);
  DeleteFun().operator()(counter);
  EXPECT_EQ(Counter::instance_count(), 0);

  // Checks if the template can be instantiated for some common built in types.
  int* pointer_int = NULL;
  DeleteFun().operator()(pointer_int);

  const char* pointer_char = NULL;
  DeleteFun().operator()(pointer_char);
}

TEST(UtilsTest, IsUserLoggedOn) {
  bool is_logged_on(false);
  ASSERT_HRESULT_SUCCEEDED(IsUserLoggedOn(&is_logged_on));
  ASSERT_TRUE(is_logged_on);
}

TEST(UtilsTest, IsClickOnceDisabled) {
  EXPECT_FALSE(IsClickOnceDisabled());
}

TEST(UtilsTest, ConfigureRunAtStartup) {
  const TCHAR kRunKeyPath[] =
      _T("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run");

  RegKey::DeleteKey(kRegistryHiveOverrideRoot, true);
  OverrideRegistryHives(kRegistryHiveOverrideRoot);

  EXPECT_FALSE(RegKey::HasKey(kRunKeyPath));

  EXPECT_EQ(HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND),
            ConfigureRunAtStartup(USER_KEY_NAME, _T("FooApp"),
                                  _T("\"foo.exe\""), false));
  EXPECT_FALSE(RegKey::HasKey(kRunKeyPath));

  EXPECT_SUCCEEDED(ConfigureRunAtStartup(USER_KEY_NAME, _T("FooApp"),
                                         _T("\"C:\\foo.exe\" /x"), true));
  CString value;
  EXPECT_SUCCEEDED(RegKey::GetValue(kRunKeyPath, _T("FooApp"), &value));
  EXPECT_STREQ(_T("\"C:\\foo.exe\" /x"), value);

  EXPECT_SUCCEEDED(ConfigureRunAtStartup(USER_KEY_NAME, _T("FooApp"),
                                         _T("\"foo.exe\""), false));
  EXPECT_FALSE(RegKey::HasValue(kRunKeyPath, _T("FooApp")));
  EXPECT_TRUE(RegKey::HasKey(kRunKeyPath));

  RestoreRegistryHives();
  EXPECT_SUCCEEDED(RegKey::DeleteKey(kRegistryHiveOverrideRoot, true));
}

TEST(UtilsTest, ValidPath) {
  CString cmd_line =
      _T("\"C:\\Program Files\\Internet Explorer\\iexplore.exe\" -nohome");
  CString exe_path;
  EXPECT_SUCCEEDED(GetExePathFromCommandLine(cmd_line, &exe_path));
  EXPECT_STREQ(_T("C:\\Program Files\\Internet Explorer\\iexplore.exe"),
               exe_path);
}

TEST(UtilsTest, InvalidPath) {
  CString cmd_line = _T("");
  CString exe_path;
  EXPECT_FAILED(GetExePathFromCommandLine(cmd_line, &exe_path));
  EXPECT_TRUE(exe_path.IsEmpty());
}

TEST(UtilsTest, PinModuleIntoProcess) {
  const TCHAR module_name[] = _T("icmp.dll");
  const void* kNullModule = NULL;

  // The module should not be loaded at this time.
  EXPECT_EQ(kNullModule, ::GetModuleHandle(module_name));

  // Loads and unloads the module.
  {
    scoped_library module(::LoadLibrary(module_name));
    EXPECT_TRUE(module);
    EXPECT_NE(kNullModule, ::GetModuleHandle(module_name));
  }
  EXPECT_EQ(kNullModule, ::GetModuleHandle(module_name));

  // Loads, pins, and unloads the module.
  {
    scoped_library module(::LoadLibrary(module_name));
    EXPECT_TRUE(module);
    EXPECT_NE(kNullModule, ::GetModuleHandle(module_name));
    PinModuleIntoProcess(module_name);
  }
  EXPECT_NE(kNullModule, ::GetModuleHandle(module_name));
}

// Assumes Windows is installed on the C: drive.
TEST(UtilsTest, GetEnvironmentVariableAsString) {
  EXPECT_STREQ(_T("C:"), GetEnvironmentVariableAsString(_T("SystemDrive")));
  EXPECT_STREQ(_T("Windows_NT"), GetEnvironmentVariableAsString(_T("OS")));
  EXPECT_STREQ(_T(""), GetEnvironmentVariableAsString(_T("FOO")));
}

TEST(UtilsTest, IsWindowsInstalling_Normal) {
  EXPECT_FALSE(IsWindowsInstalling());
}

TEST(UtilsTest, IsWindowsInstalling_Installing_Vista_InvalidValues) {
  if (!vista_util::IsVistaOrLater()) {
    return;
  }

  RegKey::DeleteKey(kRegistryHiveOverrideRoot, true);
  OverrideRegistryHives(kRegistryHiveOverrideRoot);

  EXPECT_SUCCEEDED(RegKey::SetValue(
      _T("HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\State"),
      _T("ImageState"),
      _T("")));
  EXPECT_FALSE(IsWindowsInstalling());

  EXPECT_SUCCEEDED(RegKey::SetValue(
      _T("HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\State"),
      _T("ImageState"),
      _T("foo")));
  EXPECT_FALSE(IsWindowsInstalling());

  EXPECT_SUCCEEDED(RegKey::SetValue(
      _T("HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\State"),
      _T("ImageState"),
      static_cast<DWORD>(1)));
  ExpectAsserts expect_asserts;  // RegKey asserts because value type is wrong.
  EXPECT_FALSE(IsWindowsInstalling());

  RestoreRegistryHives();
  EXPECT_SUCCEEDED(RegKey::DeleteKey(kRegistryHiveOverrideRoot, true));
}

TEST(UtilsTest, IsWindowsInstalling_Installing_Vista_ValidStates) {
  if (!vista_util::IsVistaOrLater()) {
    return;
  }

  RegKey::DeleteKey(kRegistryHiveOverrideRoot, true);
  OverrideRegistryHives(kRegistryHiveOverrideRoot);

  // These states return false in the original implementation.
  EXPECT_SUCCEEDED(RegKey::SetValue(
      _T("HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\State"),
      _T("ImageState"),
      _T("IMAGE_STATE_COMPLETE")));
  EXPECT_FALSE(IsWindowsInstalling());

  EXPECT_SUCCEEDED(RegKey::SetValue(
      _T("HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\State"),
      _T("ImageState"),
      _T("IMAGE_STATE_GENERALIZE_RESEAL_TO_OOBE")));
  EXPECT_FALSE(IsWindowsInstalling());

  EXPECT_SUCCEEDED(RegKey::SetValue(
      _T("HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\State"),
      _T("ImageState"),
      _T("IMAGE_STATE_SPECIALIZE_RESEAL_TO_OOBE")));
  EXPECT_FALSE(IsWindowsInstalling());

  // These states are specified in the original implementation.
  EXPECT_SUCCEEDED(RegKey::SetValue(
      _T("HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\State"),
      _T("ImageState"),
      _T("IMAGE_STATE_UNDEPLOYABLE")));
  EXPECT_TRUE(IsWindowsInstalling());

  EXPECT_SUCCEEDED(RegKey::SetValue(
      _T("HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\State"),
      _T("ImageState"),
      _T("IMAGE_STATE_GENERALIZE_RESEAL_TO_AUDIT")));
  EXPECT_TRUE(IsWindowsInstalling());

  EXPECT_SUCCEEDED(RegKey::SetValue(
      _T("HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\State"),
      _T("ImageState"),
      _T("IMAGE_STATE_SPECIALIZE_RESEAL_TO_AUDIT")));
  EXPECT_TRUE(IsWindowsInstalling());

  RestoreRegistryHives();
  EXPECT_SUCCEEDED(RegKey::DeleteKey(kRegistryHiveOverrideRoot, true));
}

TEST(UtilsTest, AddAllowedAce) {
  CString test_file_path = ConcatenatePath(
      app_util::GetCurrentModuleDirectory(), _T("TestAddAllowedAce.exe"));
  EXPECT_SUCCEEDED(File::Remove(test_file_path));

  EXPECT_SUCCEEDED(File::Copy(
      ConcatenatePath(app_util::GetCurrentModuleDirectory(),
                      _T("GoogleUpdate.exe")),
      test_file_path,
      false));

  CDacl dacl;
  EXPECT_TRUE(AtlGetDacl(test_file_path, SE_FILE_OBJECT, &dacl));
  const int original_ace_count = dacl.GetAceCount();

  EXPECT_SUCCEEDED(AddAllowedAce(test_file_path,
                                 SE_FILE_OBJECT,
                                 Sids::Dialup(),
                                 FILE_GENERIC_READ,
                                 0));

  dacl.SetEmpty();
  EXPECT_TRUE(AtlGetDacl(test_file_path, SE_FILE_OBJECT, &dacl));
  EXPECT_EQ(original_ace_count + 1, dacl.GetAceCount());

  // Add the same access. No ACE is added.
  EXPECT_SUCCEEDED(AddAllowedAce(test_file_path,
                                 SE_FILE_OBJECT,
                                 Sids::Dialup(),
                                 FILE_GENERIC_READ,
                                 0));
  dacl.SetEmpty();
  EXPECT_TRUE(AtlGetDacl(test_file_path, SE_FILE_OBJECT, &dacl));
  EXPECT_EQ(original_ace_count + 1, dacl.GetAceCount());

  // Add a subset of the existing access. No ACE is added.
  EXPECT_EQ(FILE_READ_ATTRIBUTES, FILE_GENERIC_READ & FILE_READ_ATTRIBUTES);
  EXPECT_SUCCEEDED(AddAllowedAce(test_file_path,
                                 SE_FILE_OBJECT,
                                 Sids::Dialup(),
                                 FILE_READ_ATTRIBUTES,
                                 0));
  dacl.SetEmpty();
  EXPECT_TRUE(AtlGetDacl(test_file_path, SE_FILE_OBJECT, &dacl));
  EXPECT_EQ(original_ace_count + 1, dacl.GetAceCount());

  // Add more access. An ACE is added.
  EXPECT_SUCCEEDED(AddAllowedAce(test_file_path,
                                 SE_FILE_OBJECT,
                                 Sids::Dialup(),
                                 FILE_ALL_ACCESS,
                                 0));
  dacl.SetEmpty();
  EXPECT_TRUE(AtlGetDacl(test_file_path, SE_FILE_OBJECT, &dacl));
  EXPECT_EQ(original_ace_count + 2, dacl.GetAceCount());

  // TODO(omaha): An assert occurs because the ACE flags are being used on a
  // file object. Add a new test to use a registry key.
  ExpectAsserts expect_asserts;

  // Different ACE flags. An ACE is added.
  const BYTE kTestAce = CONTAINER_INHERIT_ACE | OBJECT_INHERIT_ACE;
  const BYTE kTestAceSubset = CONTAINER_INHERIT_ACE;
  EXPECT_SUCCEEDED(AddAllowedAce(test_file_path,
                                 SE_FILE_OBJECT,
                                 Sids::Dialup(),
                                 FILE_ALL_ACCESS,
                                 kTestAce));
  dacl.SetEmpty();
  EXPECT_TRUE(AtlGetDacl(test_file_path, SE_FILE_OBJECT, &dacl));
  EXPECT_EQ(original_ace_count + 3, dacl.GetAceCount());

  // Subset of existing ACE flags. An ACE is added because flags must be exact.
  EXPECT_SUCCEEDED(AddAllowedAce(test_file_path,
                                 SE_FILE_OBJECT,
                                 Sids::Dialup(),
                                 FILE_ALL_ACCESS,
                                 kTestAceSubset));
  dacl.SetEmpty();
  EXPECT_TRUE(AtlGetDacl(test_file_path, SE_FILE_OBJECT, &dacl));
  EXPECT_EQ(original_ace_count + 4, dacl.GetAceCount());

  // Same flags. An ACE should not be added because all values match.
  // TODO(omaha): This does not work, possibly because the object is a file.
  // Try the test using a registry key.
  EXPECT_SUCCEEDED(AddAllowedAce(test_file_path,
                                 SE_FILE_OBJECT,
                                 Sids::Dialup(),
                                 FILE_ALL_ACCESS,
                                 kTestAceSubset));
  dacl.SetEmpty();
  EXPECT_TRUE(AtlGetDacl(test_file_path, SE_FILE_OBJECT, &dacl));
  EXPECT_EQ(original_ace_count + 5, dacl.GetAceCount());

  EXPECT_SUCCEEDED(File::Remove(test_file_path));
}

TEST(UtilsTest, CreateForegroundParentWindowForUAC) {
  CWindow foreground_parent;
  foreground_parent.Attach(CreateForegroundParentWindowForUAC());
  EXPECT_TRUE(foreground_parent.IsWindow());
  EXPECT_TRUE(foreground_parent.IsWindowVisible());

  CRect foreground_rect;
  EXPECT_TRUE(foreground_parent.GetWindowRect(&foreground_rect));
  EXPECT_EQ(0, foreground_rect.Width());
  EXPECT_EQ(0, foreground_rect.Height());

  EXPECT_TRUE((WS_POPUP | WS_VISIBLE) & foreground_parent.GetStyle());
  EXPECT_TRUE(WS_EX_TOOLWINDOW & foreground_parent.GetExStyle());

  EXPECT_TRUE(foreground_parent.DestroyWindow());
}

}  // namespace omaha