63 lines
2.2 KiB
C++
63 lines
2.2 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/timer/hi_res_timer_manager.h"
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#include <memory>
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#include <utility>
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#include "base/power_monitor/power_monitor.h"
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#include "base/power_monitor/power_monitor_device_source.h"
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#include "base/test/scoped_task_environment.h"
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#include "base/time/time.h"
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#include "build/build_config.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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#if defined(OS_WIN)
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TEST(HiResTimerManagerTest, ToggleOnOff) {
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// The power monitor creates Window to receive power notifications from
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// Windows, which makes this test flaky if you run while the machine
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// goes in or out of AC power.
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test::ScopedTaskEnvironment scoped_task_environment(
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test::ScopedTaskEnvironment::MainThreadType::UI);
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std::unique_ptr<base::PowerMonitorSource> power_monitor_source(
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new base::PowerMonitorDeviceSource());
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std::unique_ptr<base::PowerMonitor> power_monitor(
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new base::PowerMonitor(std::move(power_monitor_source)));
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HighResolutionTimerManager manager;
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// Simulate a on-AC power event to get to a known initial state.
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manager.OnPowerStateChange(false);
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// Loop a few times to test power toggling.
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for (int times = 0; times != 3; ++times) {
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// The manager has the high resolution clock enabled now.
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EXPECT_TRUE(manager.hi_res_clock_available());
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// But the Time class has it off, because it hasn't been activated.
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EXPECT_FALSE(base::Time::IsHighResolutionTimerInUse());
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// Activate the high resolution timer.
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base::Time::ActivateHighResolutionTimer(true);
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EXPECT_TRUE(base::Time::IsHighResolutionTimerInUse());
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// Simulate a on-battery power event.
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manager.OnPowerStateChange(true);
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EXPECT_FALSE(manager.hi_res_clock_available());
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EXPECT_FALSE(base::Time::IsHighResolutionTimerInUse());
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// Back to on-AC power.
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manager.OnPowerStateChange(false);
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EXPECT_TRUE(manager.hi_res_clock_available());
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EXPECT_TRUE(base::Time::IsHighResolutionTimerInUse());
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// De-activate the high resolution timer.
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base::Time::ActivateHighResolutionTimer(false);
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}
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}
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#endif // defined(OS_WIN)
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} // namespace base
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