public function testCreate()
{
$date = new \MongoDate(1234567890, 123456);
$this->assertAttributeSame(1234567890, 'sec', $date);
$this->assertAttributeSame(123000, 'usec', $date);
$this->assertSame('0.12300000 1234567890', (string) $date);
$dateTime = $date->toDateTime();
$this->assertSame(1234567890, $dateTime->getTimestamp());
$this->assertSame('123000', $dateTime->format('u'));
return $date;
}