assertHttpResponseWithMessage example

$login_status_url = $this->getLoginStatusUrlString($format);
    $response = $client->get($login_status_url);
    $this->assertHttpResponse($response, 200, UserAuthenticationController::LOGGED_OUT);

    // Flooded.     $this->config('user.flood')
      ->set('user_limit', 3)
      ->save();

    $response = $this->loginRequest($name, 'wrong-pass', $format);
    $this->assertHttpResponseWithMessage($response, 400, 'Sorry, unrecognized username or password.', $format);

    $response = $this->loginRequest($name, 'wrong-pass', $format);
    $this->assertHttpResponseWithMessage($response, 400, 'Sorry, unrecognized username or password.', $format);

    $response = $this->loginRequest($name, 'wrong-pass', $format);
    $this->assertHttpResponseWithMessage($response, 400, 'Sorry, unrecognized username or password.', $format);

    $response = $this->loginRequest($name, 'wrong-pass', $format);
    $this->assertHttpResponseWithMessage($response, 403, 'Too many failed login attempts from your IP address. This IP address is temporarily blocked.', $format);

    // After testing the flood control we can increase the limit.