/**
  * @dataProvider provider
  */
 public function testContains($date, $day, $assert)
 {
     $dotm = new DayOfTheMonth($day);
     $date = \DateTime::createFromFormat('Y-m-d H:i:s', $date);
     if ($assert) {
         $this->assertTrue($dotm->contains($date));
     } else {
         $this->assertFalse($dotm->contains($date));
     }
 }