public function testRemoveHeaders()
 {
     $this->mockEngineMethod('removeHeaders');
     Response::removeHeaders();
 }
 /**
  * @return void
  */
 private function rewriteHttpHeaders()
 {
     Response::removeHeaders();
     $error = $this->getError();
     if ($error instanceof HttpException) {
         foreach ($error->getHttpHeaders() as $header) {
             Response::setHeader($header);
         }
     } else {
         Response::setHeader('HTTP/1.1 500 Internal Server Error');
     }
 }