public function testTrim()
 {
     $filter = TrimFilter::create();
     $text = ' qq ';
     $this->assertEquals($filter->apply($text), 'qq');
     $this->assertEquals($filter->setLeft()->apply($text), 'qq ');
     $this->assertEquals($filter->setRight()->apply($text), ' qq');
     $this->assertEquals($filter->setBoth()->apply($text), 'qq');
 }
 /**
  * @return TrimFilter
  **/
 public static function trim()
 {
     return TrimFilter::create();
 }