public function testCookieSetInRequest()
 {
     $this->getSlimInstance()->get('/', function ($req, $res) {
         return $res->write("body");
     });
     $client = new WebTestClient($this->getSlimInstance());
     $key = "my_cookie";
     $value = "test";
     $client->setCookie($key, $value);
     $body = $client->get('/');
     self::assertEquals($value, $client->request->getCookieParams()[$key]);
 }