public function testElapsedStartPauseStop()
{
$this->stopWatch->start();
usleep(2500);
$this->stopWatch->pause();
usleep(32000);
$this->stopWatch->stop();
$elapsed = $this->stopWatch->getElapsedMilliseconds();
$this->assertGreaterThanOrEqual(2, $elapsed);
$this->assertLessThan(10, $elapsed);
}