Ouzo\Utilities\Clock::at PHP Метод

    public static function at($date)
    {
        return new Clock(new DateTime($date));
    }

 /**
  * @test
  */
 public function shouldChangeIfDateIsBeforeAnotherDate()
 {
     $this->assertTrue(Clock::at('2011-01-01 12:34:13')->isBefore(Clock::at('2011-01-02 12:34:13')));
     $this->assertFalse(Clock::at('2011-01-02 12:34:13')->isBefore(Clock::at('2011-01-01 12:34:13')));
     $this->assertTrue(Clock::at('2011-01-01 12:34:13')->isBeforeOrEqualTo(Clock::at('2011-01-02 12:34:13')));
     $this->assertFalse(Clock::at('2011-01-02 12:34:13')->isBeforeOrEqualTo(Clock::at('2011-01-01 12:34:13')));
     $this->assertTrue(Clock::at('2011-01-01 12:34:13')->isBeforeOrEqualTo(Clock::at('2011-01-01 12:34:13')));
 }