public function testCors()
{
$listener = new CorsListener();
$headers = ['Origin' => 'localhost'];
$request = new Request('GET /resource', $headers);
$response = new Response();
$event = new KernelResponseEvent($request, $response);
$listener->onKernelResponse($event);
$responsex = $event->getResponse();
$this->assertFalse($response->hasHeader('Access-Control-Allow-Origin'));
$this->assertEquals('localhost', $responsex->getHeaderLine('Access-Control-Allow-Origin'));
}
