public function test_Date_time_compare_same_timestamp()
 {
     $aDatetime = new DateTime(0);
     // before() and after() return FALSE because,
     // they compare with '>' or '<' but not '>=' or '<='
     $this->assertFalse($aDatetime->before($aDatetime));
     $this->assertFalse($aDatetime->after($aDatetime));
     $this->assertTrue($aDatetime->equals($aDatetime));
 }