assertTrue(round($res, 1) === 0.2); time_nanosleep(0, 100000000); $res = Clock::returnElapsedTime(8, true); $this->assertTrue(round($res, 1) === 0.3); time_nanosleep(0, 100000000); $res = Clock::returnElapsedTime(); $this->assertTrue(round($res, 1) === 0.1); } }