/**
  * @param bool|string $input
  * @param bool|string $output
  * @param bool|string $filter
  * @dataProvider applyOutputFilterDataProvider
  */
 public function testApplyOutputFilter($input, $output, $filter)
 {
     if ($input) {
         $this->_attributeMock->expects($this->once())->method('getInputFilter')->will($this->returnValue($filter));
     }
     $this->assertEquals($output, $this->_model->applyOutputFilter($input));
 }