public function testToDateTime()
{
$microtime = microtime(true);
list($sec, $usec) = explode('.', $microtime);
$usec = str_pad($usec, 6, '0');
$date = \DateTime::createFromFormat('U.u', $sec . '.' . $usec);
$m = Microtime::fromString($sec . $usec);
$this->assertSame($date->format('Y-m-d H:i:s.u'), $m->toDateTime()->format('Y-m-d H:i:s.u'));
$this->assertSame(Microtime::fromDateTime($date)->toDateTime()->format('Y-m-d H:i:s.u'), $m->toDateTime()->format('Y-m-d H:i:s.u'));
}
