101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
// Copyright 2019 The Chromium Authors
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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/elapsed_timer.h"
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#include "base/threading/platform_thread.h"
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#include "base/time/time.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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namespace {
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constexpr TimeDelta kSleepDuration = Milliseconds(20);
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}
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TEST(ElapsedTimerTest, Simple) {
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ElapsedTimer timer;
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PlatformThread::Sleep(kSleepDuration);
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EXPECT_GE(timer.Elapsed(), kSleepDuration);
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// Can call |Elapsed()| multiple times.
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PlatformThread::Sleep(kSleepDuration);
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EXPECT_GE(timer.Elapsed(), 2 * kSleepDuration);
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}
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TEST(ElapsedTimerTest, Mocked) {
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ScopedMockElapsedTimersForTest mock_elapsed_timer;
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ElapsedTimer timer;
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EXPECT_EQ(timer.Elapsed(), ScopedMockElapsedTimersForTest::kMockElapsedTime);
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// Real-time doesn't matter.
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PlatformThread::Sleep(kSleepDuration);
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EXPECT_EQ(timer.Elapsed(), ScopedMockElapsedTimersForTest::kMockElapsedTime);
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}
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class ElapsedThreadTimerTest : public ::testing::Test {
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protected:
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void SetUp() override {
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if (ThreadTicks::IsSupported())
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ThreadTicks::WaitUntilInitialized();
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}
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};
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TEST_F(ElapsedThreadTimerTest, IsSupported) {
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ElapsedThreadTimer timer;
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if (!ThreadTicks::IsSupported()) {
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EXPECT_FALSE(timer.is_supported());
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EXPECT_EQ(TimeDelta(), timer.Elapsed());
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} else {
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EXPECT_TRUE(timer.is_supported());
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}
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}
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TEST_F(ElapsedThreadTimerTest, Simple) {
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if (!ThreadTicks::IsSupported())
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return;
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ElapsedThreadTimer timer;
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EXPECT_TRUE(timer.is_supported());
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// 1ms of work.
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constexpr TimeDelta kLoopingTime = Milliseconds(1);
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const ThreadTicks start_ticks = ThreadTicks::Now();
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while (ThreadTicks::Now() - start_ticks < kLoopingTime) {
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}
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EXPECT_GE(timer.Elapsed(), kLoopingTime);
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}
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TEST_F(ElapsedThreadTimerTest, DoesNotCountSleep) {
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if (!ThreadTicks::IsSupported())
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return;
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ElapsedThreadTimer timer;
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EXPECT_TRUE(timer.is_supported());
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PlatformThread::Sleep(kSleepDuration);
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// Sleep time is not accounted for.
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EXPECT_LT(timer.Elapsed(), kSleepDuration);
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}
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TEST_F(ElapsedThreadTimerTest, Mocked) {
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if (!ThreadTicks::IsSupported())
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return;
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ScopedMockElapsedTimersForTest mock_elapsed_timer;
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ElapsedThreadTimer timer;
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EXPECT_EQ(timer.Elapsed(), ScopedMockElapsedTimersForTest::kMockElapsedTime);
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// Real-time doesn't matter.
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PlatformThread::Sleep(kSleepDuration);
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EXPECT_EQ(timer.Elapsed(), ScopedMockElapsedTimersForTest::kMockElapsedTime);
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}
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} // namespace base
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