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#include <mbgl/test/util.hpp>
#include <mbgl/util/chrono.hpp>
#include <mbgl/util/timer.hpp>
#include <mbgl/util/run_loop.hpp>
#include <memory>
using namespace mbgl::util;
TEST(Timer, TEST_REQUIRES_ACCURATE_TIMING(Basic)) {
RunLoop loop;
Timer timer;
auto callback = [&loop] { loop.stop(); };
auto interval = mbgl::Milliseconds(300);
auto expectedTotalTime = interval;
auto first = mbgl::Clock::now();
timer.start(interval, mbgl::Duration::zero(), callback);
loop.run();
auto totalTime = std::chrono::duration_cast<mbgl::Milliseconds>(mbgl::Clock::now() - first);
// These are not high precision timers. Especially libuv uses
// cached time from the beginning of of the main loop iteration
// and it is very prone to fire earlier, which is, odd.
EXPECT_GE(totalTime, expectedTotalTime * 0.8);
EXPECT_LE(totalTime, expectedTotalTime * 1.2);
}
TEST(Timer, TEST_REQUIRES_ACCURATE_TIMING(Repeat)) {
RunLoop loop;
Timer timer;
unsigned count = 10;
auto callback = [&] {
if (!--count) {
loop.stop();
}
};
auto interval = mbgl::Milliseconds(50);
auto expectedTotalTime = interval * count;
auto first = mbgl::Clock::now();
timer.start(interval, interval, callback);
loop.run();
auto totalTime = std::chrono::duration_cast<mbgl::Milliseconds>(mbgl::Clock::now() - first);
EXPECT_GE(totalTime, expectedTotalTime * 0.8);
EXPECT_LE(totalTime, expectedTotalTime * 1.2);
}
TEST(Timer, TEST_REQUIRES_ACCURATE_TIMING(Stop)) {
RunLoop loop;
Timer timer1;
Timer timer2;
auto interval1 = mbgl::Milliseconds(50);
auto interval2 = mbgl::Milliseconds(250);
auto expectedTotalTime = interval2;
int count = 0;
auto callback1 = [&] {
++count;
timer1.stop();
};
auto callback2 = [&] {
++count;
loop.stop();
};
auto first = mbgl::Clock::now();
timer1.start(interval1, interval1, callback1);
timer2.start(interval2, mbgl::Duration::zero(), callback2);
loop.run();
auto totalTime = std::chrono::duration_cast<mbgl::Milliseconds>(mbgl::Clock::now() - first);
EXPECT_EQ(count, 2);
EXPECT_GE(totalTime, expectedTotalTime * 0.8);
EXPECT_LE(totalTime, expectedTotalTime * 1.2);
}
TEST(Timer, TEST_REQUIRES_ACCURATE_TIMING(DestroyShouldStop)) {
RunLoop loop;
auto timer1 = std::make_unique<Timer>();
Timer timer2;
auto interval1 = mbgl::Milliseconds(50);
auto interval2 = mbgl::Milliseconds(250);
auto expectedTotalTime = interval2;
int count = 0;
auto callback1 = [&] {
++count;
timer1.reset();
};
auto callback2 = [&] {
++count;
loop.stop();
};
auto first = mbgl::Clock::now();
timer1->start(interval1, interval1, callback1);
timer2.start(interval2, mbgl::Duration::zero(), callback2);
loop.run();
auto totalTime = std::chrono::duration_cast<mbgl::Milliseconds>(mbgl::Clock::now() - first);
EXPECT_EQ(count, 2);
EXPECT_GE(totalTime, expectedTotalTime * 0.8);
EXPECT_LE(totalTime, expectedTotalTime * 1.2);
}
TEST(Timer, TEST_REQUIRES_ACCURATE_TIMING(StoppedDuringExpiration)) {
// The idea is to have original timer cancellation and expiration roughly at the same time.
// In this case some timer backens (e.g. asio::high_resolution_timer)
// may call the expiration callback with good status while the timer may not expect it.
RunLoop loop;
auto timer = std::make_unique<Timer>();
auto loopStopTimer = std::make_unique<Timer>();
auto expireTimeout = mbgl::Milliseconds(50);
auto timerCallback = [&] {
// we cannot expect much here as in some cases timer may be finished earlier
// than the loop stop timer (and thus the callback will be called)
};
auto loopStopTimerCallback = [&] {
timer->stop();
loop.stop();
};
auto first = mbgl::Clock::now();
loopStopTimer->start(expireTimeout, mbgl::Milliseconds(0), loopStopTimerCallback);
timer->start(expireTimeout, mbgl::Milliseconds(0), timerCallback);
loop.run();
auto totalTime = std::chrono::duration_cast<mbgl::Milliseconds>(mbgl::Clock::now() - first);
EXPECT_GE(totalTime, expireTimeout * 0.8);
EXPECT_LE(totalTime, expireTimeout * 1.2);
}
TEST(Timer, TEST_REQUIRES_ACCURATE_TIMING(StoppedAfterExpiration)) {
RunLoop loop;
auto timer = std::make_unique<Timer>();
auto loopStopTimer = std::make_unique<Timer>();
auto expireTimeout = mbgl::Milliseconds(50);
bool callbackFired = false;
auto timerCallback = [&] { callbackFired = true; };
auto first = mbgl::Clock::now();
timer->start(expireTimeout, mbgl::Milliseconds(0), timerCallback);
// poll until the timer expires
auto expireWaitInterval = expireTimeout * 2;
auto startWaitTime = mbgl::Clock::now();
auto waitDuration = mbgl::Duration::zero();
while (waitDuration < expireWaitInterval) {
waitDuration = std::chrono::duration_cast<mbgl::Milliseconds>(mbgl::Clock::now() - startWaitTime);
}
timer->stop();
loop.runOnce();
auto totalTime = std::chrono::duration_cast<mbgl::Milliseconds>(mbgl::Clock::now() - first);
EXPECT_TRUE(!callbackFired);
EXPECT_GE(totalTime, expireWaitInterval * 0.8);
EXPECT_LE(totalTime, expireWaitInterval * 1.2);
}
TEST(Timer, TEST_REQUIRES_ACCURATE_TIMING(StartOverrides)) {
RunLoop loop;
Timer timer;
auto interval1 = mbgl::Milliseconds(50);
auto interval2 = mbgl::Milliseconds(250);
auto expectedTotalTime = interval1 + interval2;
int count = 0;
auto callback2 = [&] {
++count;
loop.stop();
};
auto callback1 = [&] {
++count;
timer.start(interval2, mbgl::Duration::zero(), callback2);
};
auto first = mbgl::Clock::now();
timer.start(interval1, mbgl::Duration::zero(), callback1);
loop.run();
auto totalTime = std::chrono::duration_cast<mbgl::Milliseconds>(mbgl::Clock::now() - first);
EXPECT_EQ(count, 2);
EXPECT_GE(totalTime, expectedTotalTime * 0.8);
EXPECT_LE(totalTime, expectedTotalTime * 1.2);
}
TEST(Timer, TEST_REQUIRES_ACCURATE_TIMING(CanStopNonStartedTimer)) {
RunLoop loop;
Timer timer;
timer.stop();
}
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