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<?php declare(strict_types=1);
/*
* This file is part of PHPUnit.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace PHPUnit\Event\Telemetry;
use function hrtime;
use PHPUnit\Framework\Attributes\CoversClass;
use PHPUnit\Framework\Attributes\Small;
use PHPUnit\Framework\TestCase;
#[CoversClass(SystemStopWatch::class)]
#[Small]
final class SystemStopWatchTest extends TestCase
{
public function testNowReturnsDateTimeImmutable(): void
{
$clock = new SystemStopWatch;
$before = HRTime::fromSecondsAndNanoseconds(...hrtime(false));
$current = $clock->current();
$after = HRTime::fromSecondsAndNanoseconds(...hrtime(false));
$durationBetweenCurrentAndBefore = $current->duration($before);
$this->assertSame(0, $durationBetweenCurrentAndBefore->seconds());
$this->assertGreaterThan(0, $durationBetweenCurrentAndBefore->nanoseconds());
$durationBetweenAfterAndCurrent = $after->duration($current);
$this->assertSame(0, $durationBetweenAfterAndCurrent->seconds());
$this->assertGreaterThan(0, $durationBetweenAfterAndCurrent->nanoseconds());
}
}
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