base/win/scoped_handle_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 "base/win/scoped_handle.h"

#include "testing/gtest/include/gtest/gtest.h"

TEST(ScopedHandleTest, ScopedHandle) {
  // Any illegal error code will do. We just need to test that it is preserved
  // by ScopedHandle to avoid bug 528394.
  const DWORD magic_error = 0x12345678;

  HANDLE handle = ::CreateMutex(nullptr, FALSE, nullptr);
  // Call SetLastError after creating the handle.
  ::SetLastError(magic_error);
  base::win::ScopedHandle handle_holder(handle);
  EXPECT_EQ(magic_error, ::GetLastError());

  // Create a new handle and then set LastError again.
  handle = ::CreateMutex(nullptr, FALSE, nullptr);
  ::SetLastError(magic_error);
  handle_holder.Set(handle);
  EXPECT_EQ(magic_error, ::GetLastError());

  // Create a new handle and then set LastError again.
  handle = ::CreateMutex(nullptr, FALSE, nullptr);
  base::win::ScopedHandle handle_source(handle);
  ::SetLastError(magic_error);
  handle_holder = handle_source.Pass();
  EXPECT_EQ(magic_error, ::GetLastError());
}