app/hi_res_timer_manager_unittest.cc - Issue 3948001: Revert 63176 - Fix regression where high resolution timers could be activated...

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Issue 3948001: Revert 63176 - Fix regression where high resolution timers could be activated... (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/

Patch Set: Created 10 years, 2 months ago

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1 // Copyright (c) 2010 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 "testing/gtest/include/gtest/gtest.h"

6

7 #include "app/hi_res_timer_manager.h"

8 #include "app/system_monitor.h"

9 #include "base/time.h"

10

11 #if defined(OS_WIN)

12 TEST(HiResTimerManagerTest, ToggleOnOff) {

13 MessageLoop loop;

14 scoped_ptr<SystemMonitor> system_monitor(new SystemMonitor());

15 HighResolutionTimerManager manager;

16

17 // At this point, we don't know if the high resolution timers are on or off,

18 // it depends on what system the tests are running on (for example, if this

19 // test is running on a laptop/battery, then the SystemMonitor would have

20 // already set the PowerState to battery power; but if we're running on a

21 // desktop, then the PowerState will be non-battery power). Simulate a power

22 // level change to get to a deterministic state.

23 manager.OnPowerStateChange(/* on_battery */ false);

24

25 // Loop a few times to test power toggling.

26 for (int loop = 2; loop >= 0; --loop) {

27 // The manager has the high resolution clock enabled now.

28 EXPECT_TRUE(manager.using_hi_res_clock());

29 // But the Time class has it off, because it hasn't been activated.

30 EXPECT_FALSE(base::Time::IsHighResolutionTimerInUse());

31

32 // Activate the high resolution timer.

33 base::Time::ActivateHighResolutionTimer(true);

34 EXPECT_TRUE(base::Time::IsHighResolutionTimerInUse());

35

36 // Simulate a on-battery power event.

37 manager.OnPowerStateChange(/* on_battery */ true);

38 EXPECT_FALSE(manager.using_hi_res_clock());

39 EXPECT_FALSE(base::Time::IsHighResolutionTimerInUse());

40

41 // Simulate a off-battery power event.

42 manager.OnPowerStateChange(/* on_battery */ false);

43 EXPECT_TRUE(manager.using_hi_res_clock());

44 EXPECT_TRUE(base::Time::IsHighResolutionTimerInUse());

45

46 // De-activate the high resolution timer.

47 base::Time::ActivateHighResolutionTimer(false);

48 }

49 }

50 #endif // defined(OS_WIN)

51

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