public function testStatusCodeResponses($statusCode)
{
$uri = "http://httpbin.org/status/{$statusCode}";
$client = new Client();
$promise = $client->request($uri);
$response = \Amp\wait($promise);
$this->assertInstanceOf('Amp\\Artax\\Response', $response);
$this->assertEquals($statusCode, $response->getStatus());
}