private function mockResponse($status, $body = null) { $mock = new Mock(); if ($status === 200) { $mock->addResponse(new Response($status, array(), $body === null ? null : Stream::factory($body))); } else { $mock->addException(new RequestException('Exception', new Request('GET', 'http://graph.facebook.com/xyz'))); } $this->guzzleClient->getEmitter()->attach($mock); }