/**
  * @return \Zend\InputFilter\InputFilterInterface
  */
 public function getInputFilter()
 {
     if (!$this->inputFilter) {
         $this->inputFilter = parent::getInputFilter();
         $this->inputFilter->merge(new DeputyFilter());
     }
     return $this->inputFilter;
 }
 public function testGetInputFilter()
 {
     $this->assertTrue($this->attorney->getInputFilter() instanceof \Zend\InputFilter\InputFilter);
 }