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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "statsreport/common/highres_timer.h"
#include "gtest/gtest.h"
#include "base/basictypes.h"
// These unittests have proven to be flaky on the build server. While
// we don't want them breaking the build, we still build them to guard
// against bitrot. On dev's machines during local builds we leave them
// enabled.
#ifndef BUILD_SERVER_BUILD
TEST(HighresTimer, MillisecondClock) {
#else
TEST(HighresTimer, DISABLED_MillisecondClock) {
#endif
HighresTimer timer;
// note: this could fail if we context switch between initializing the timer
// and here. Very unlikely however.
EXPECT_EQ(0U, timer.GetElapsedMs());
timer.Start();
uint64 half_ms = HighresTimer::GetTimerFrequency() / 2000;
// busy wait for half a millisecond
while (timer.start_ticks() + half_ms > HighresTimer::GetCurrentTicks()) {
// Nothing
}
EXPECT_EQ(1U, timer.GetElapsedMs());
}
#ifndef BUILD_SERVER_BUILD
TEST(HighresTimer, SecondClock) {
#else
TEST(HighresTimer, DISABLED_SecondClock) {
#endif
HighresTimer timer;
EXPECT_EQ(0U, timer.GetElapsedSec());
#ifdef OS_WIN
::Sleep(250);
#else
struct timespec ts1 = {0, 250000000};
nanosleep(&ts1, 0);
#endif
EXPECT_EQ(0U, timer.GetElapsedSec());
EXPECT_LE(230U, timer.GetElapsedMs());
EXPECT_GE(270U, timer.GetElapsedMs());
#ifdef OS_WIN
::Sleep(251);
#else
struct timespec ts2 = {0, 251000000};
nanosleep(&ts2, 0);
#endif
EXPECT_EQ(1U, timer.GetElapsedSec());
}
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