class TimerTest in Drupal 9
Same name and namespace in other branches
- 8 core/tests/Drupal/Tests/Component/Utility/TimerTest.php \Drupal\Tests\Component\Utility\TimerTest
Tests the Timer system.
@group Utility
@coversDefaultClass \Drupal\Component\Utility\Timer
Hierarchy
- class \Drupal\Tests\Component\Utility\TimerTest extends \PHPUnit\Framework\TestCase
Expanded class hierarchy of TimerTest
File
- core/
tests/ Drupal/ Tests/ Component/ Utility/ TimerTest.php, line 15
Namespace
Drupal\Tests\Component\UtilityView source
class TimerTest extends TestCase {
/**
* Tests Timer::read() time accumulation accuracy across multiple restarts.
*
* @covers ::start
* @covers ::stop
* @covers ::read
*/
public function testTimer() {
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.');
}
}
Members
Name | Modifiers | Type | Description | Overrides |
---|---|---|---|---|
TimerTest:: |
public | function | Tests Timer::read() time accumulation accuracy across multiple restarts. |