public function testListenerSkipsSubReqs()
 {
     $listener = new ExternalRedirectListener(true);
     $request = Request::create('http://test.org/');
     $response = new RedirectResponse('http://foo.com/');
     $event = new FilterResponseEvent($this->kernel, $request, HttpKernelInterface::SUB_REQUEST, $response);
     $listener->onKernelResponse($event);
     $this->assertSame(true, $response->isRedirect());
     $this->assertSame('http://foo.com/', $response->headers->get('Location'));
 }