/**
  * @return void
  */
 public function testCallingUnknownMethod()
 {
     if (!extension_loaded('mcrypt')) {
         $this->markTestSkipped('Mcrypt extension not installed');
     }
     $filter = new Zend_Filter_Decrypt();
     try {
         $filter->getUnknownMethod();
         $this->fail('Exception expected on calling a non existing method');
     } catch (Zend_Filter_Exception $e) {
         $this->assertContains('Unknown method', $e->getMessage());
     }
 }