}

  /** Respond to a proxy authorization challenge.  */
  @ParameterizedTest
  @ArgumentsSource(ProtocolParamProvider::class)
  fun proxyAuthenticateOnConnect(protocol: Protocol) {
    setUp(protocol)
    server.enqueue(
      MockResponse
        .Builder()
        .code(407)
        .headers(headersOf("Proxy-Authenticate", "Basic realm=\"localhost\""))