Validation::inList PHP Method

    public static function inList($value, $list)
    {
        return in_array($value, $list);
    }

 /**
  * testInList method
  *
  * @return void
  */
 public function testInList()
 {
     $this->assertTrue(Validation::inList('one', array('one', 'two')));
     $this->assertTrue(Validation::inList('two', array('one', 'two')));
     $this->assertFalse(Validation::inList('three', array('one', 'two')));
     $this->assertFalse(Validation::inList('1one', array(0, 1, 2, 3)));
     $this->assertFalse(Validation::inList('one', array(0, 1, 2, 3)));
     $this->assertFalse(Validation::inList('2', array(1, 2, 3)));
     $this->assertTrue(Validation::inList('2', array(1, 2, 3), false));
 }