function TimerTest::testTimer
Same name in other branches
- 9 core/tests/Drupal/Tests/Component/Utility/TimerTest.php \Drupal\Tests\Component\Utility\TimerTest::testTimer()
- 8.9.x core/tests/Drupal/Tests/Component/Utility/TimerTest.php \Drupal\Tests\Component\Utility\TimerTest::testTimer()
- 11.x core/tests/Drupal/Tests/Component/Utility/TimerTest.php \Drupal\Tests\Component\Utility\TimerTest::testTimer()
Tests Timer::read() time accumulation accuracy across multiple restarts.
@covers ::start @covers ::stop @covers ::read
File
-
core/
tests/ Drupal/ Tests/ Component/ Utility/ TimerTest.php, line 26
Class
- TimerTest
- Tests the Timer system.
Namespace
Drupal\Tests\Component\UtilityCode
public function testTimer() : void {
Timer::start('test');
usleep(5000);
$value = Timer::read('test');
usleep(5000);
$value2 = Timer::read('test');
usleep(5000);
$value3 = Timer::read('test');
usleep(5000);
$value4 = Timer::read('test');
// Although we sleep for 5 milliseconds, we should test that at least 4 ms
// have past because usleep() is not reliable on Windows. See
// http://php.net/manual/function.usleep.php for more information. The
// purpose of the test to validate that the Timer class can measure elapsed
// time not the granularity of usleep() on a particular OS.
$this->assertGreaterThanOrEqual(4, $value, 'Timer failed to measure at least 4 milliseconds of sleeping while running.');
$this->assertGreaterThanOrEqual($value + 4, $value2, 'Timer failed to measure at least 8 milliseconds of sleeping while running.');
$this->assertGreaterThanOrEqual($value2 + 4, $value3, 'Timer failed to measure at least 12 milliseconds of sleeping while running.');
$this->assertGreaterThanOrEqual($value3 + 4, $value4, 'Timer failed to measure at least 16 milliseconds of sleeping while running.');
// Stop the timer.
$value5 = Timer::stop('test');
$this->assertGreaterThanOrEqual($value4, $value5['time'], 'Timer measured after stopping was not greater than last measurement.');
// Read again.
$value6 = Timer::read('test');
$this->assertEquals($value5['time'], $value6, 'Timer measured after stopping was not equal to the stopped time.');
// Restart.
Timer::start('test');
usleep(5000);
$value7 = Timer::read('test');
$this->assertGreaterThanOrEqual($value6 + 4, $value7, 'Timer failed to measure at least 16 milliseconds of sleeping while running.');
// Stop again.
$value8 = Timer::stop('test');
$value9 = Timer::read('test');
$this->assertEquals($value8['time'], $value9, 'Timer measured after stopping not equal to stop time.');
}
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