Benoît Lizé | 0af836f | 2019-05-15 09:44:41 | [diff] [blame] | 1 | // Copyright 2019 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 "base/timer/elapsed_timer.h" |
| 6 | |
| 7 | #include "base/threading/platform_thread.h" |
| 8 | #include "base/time/time.h" |
| 9 | #include "testing/gtest/include/gtest/gtest.h" |
| 10 | |
| 11 | namespace base { |
| 12 | |
| 13 | namespace { |
| 14 | |
Peter Kasting | 53fd6ee | 2021-10-05 20:40:48 | [diff] [blame^] | 15 | constexpr TimeDelta kSleepDuration = Milliseconds(20); |
Benoît Lizé | 0af836f | 2019-05-15 09:44:41 | [diff] [blame] | 16 | } |
| 17 | |
| 18 | TEST(ElapsedTimerTest, Simple) { |
| 19 | ElapsedTimer timer; |
| 20 | |
| 21 | PlatformThread::Sleep(kSleepDuration); |
| 22 | EXPECT_GE(timer.Elapsed(), kSleepDuration); |
| 23 | |
| 24 | // Can call |Elapsed()| multiple times. |
| 25 | PlatformThread::Sleep(kSleepDuration); |
| 26 | EXPECT_GE(timer.Elapsed(), 2 * kSleepDuration); |
| 27 | } |
| 28 | |
Gabriel Charette | ef6cbc2 | 2019-08-02 06:24:59 | [diff] [blame] | 29 | TEST(ElapsedTimerTest, Mocked) { |
| 30 | ScopedMockElapsedTimersForTest mock_elapsed_timer; |
| 31 | |
| 32 | ElapsedTimer timer; |
| 33 | EXPECT_EQ(timer.Elapsed(), ScopedMockElapsedTimersForTest::kMockElapsedTime); |
| 34 | |
| 35 | // Real-time doesn't matter. |
| 36 | PlatformThread::Sleep(kSleepDuration); |
| 37 | EXPECT_EQ(timer.Elapsed(), ScopedMockElapsedTimersForTest::kMockElapsedTime); |
| 38 | } |
| 39 | |
Benoît Lizé | 0af836f | 2019-05-15 09:44:41 | [diff] [blame] | 40 | class ElapsedThreadTimerTest : public ::testing::Test { |
| 41 | protected: |
| 42 | void SetUp() override { |
| 43 | if (ThreadTicks::IsSupported()) |
| 44 | ThreadTicks::WaitUntilInitialized(); |
| 45 | } |
| 46 | }; |
| 47 | |
| 48 | TEST_F(ElapsedThreadTimerTest, IsSupported) { |
| 49 | ElapsedThreadTimer timer; |
| 50 | if (!ThreadTicks::IsSupported()) { |
| 51 | EXPECT_FALSE(timer.is_supported()); |
| 52 | EXPECT_EQ(TimeDelta(), timer.Elapsed()); |
| 53 | } else { |
| 54 | EXPECT_TRUE(timer.is_supported()); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | TEST_F(ElapsedThreadTimerTest, Simple) { |
| 59 | if (!ThreadTicks::IsSupported()) |
| 60 | return; |
| 61 | |
| 62 | ElapsedThreadTimer timer; |
| 63 | EXPECT_TRUE(timer.is_supported()); |
| 64 | |
| 65 | // 1ms of work. |
Peter Kasting | 53fd6ee | 2021-10-05 20:40:48 | [diff] [blame^] | 66 | constexpr TimeDelta kLoopingTime = Milliseconds(1); |
Benoît Lizé | 0af836f | 2019-05-15 09:44:41 | [diff] [blame] | 67 | const ThreadTicks start_ticks = ThreadTicks::Now(); |
| 68 | while (ThreadTicks::Now() - start_ticks < kLoopingTime) { |
| 69 | } |
| 70 | |
| 71 | EXPECT_GE(timer.Elapsed(), kLoopingTime); |
| 72 | } |
| 73 | |
| 74 | TEST_F(ElapsedThreadTimerTest, DoesNotCountSleep) { |
| 75 | if (!ThreadTicks::IsSupported()) |
| 76 | return; |
| 77 | |
| 78 | ElapsedThreadTimer timer; |
| 79 | EXPECT_TRUE(timer.is_supported()); |
| 80 | |
| 81 | PlatformThread::Sleep(kSleepDuration); |
| 82 | // Sleep time is not accounted for. |
| 83 | EXPECT_LT(timer.Elapsed(), kSleepDuration); |
| 84 | } |
| 85 | |
Gabriel Charette | ef6cbc2 | 2019-08-02 06:24:59 | [diff] [blame] | 86 | TEST_F(ElapsedThreadTimerTest, Mocked) { |
| 87 | if (!ThreadTicks::IsSupported()) |
| 88 | return; |
| 89 | |
| 90 | ScopedMockElapsedTimersForTest mock_elapsed_timer; |
| 91 | |
| 92 | ElapsedThreadTimer timer; |
| 93 | EXPECT_EQ(timer.Elapsed(), ScopedMockElapsedTimersForTest::kMockElapsedTime); |
| 94 | |
| 95 | // Real-time doesn't matter. |
| 96 | PlatformThread::Sleep(kSleepDuration); |
| 97 | EXPECT_EQ(timer.Elapsed(), ScopedMockElapsedTimersForTest::kMockElapsedTime); |
| 98 | } |
| 99 | |
Benoît Lizé | 0af836f | 2019-05-15 09:44:41 | [diff] [blame] | 100 | } // namespace base |