for range n {
		l, err := net.Listen("tcp", "127.0.0.1:0")
		if err != nil {
			if l, err = net.Listen("tcp6", "[::1]:0"); err != nil {
				return nil, nil, fmt.Errorf("httptest: failed to listen on a port: %v", err)
			}
		}
		addr := l.Addr()
		hosts = append(hosts, "http://"+addr.String())
		listeners = append(listeners, l)
	}
	return hosts, listeners, err
}

          host: InetAddress,
          port: Int,
        ): Socket? = null

        override fun createSocket(
          address: InetAddress,
          port: Int,
          localAddress: InetAddress,
          localPort: Int,
        ): Socket? = null

        override fun createSocket(
          host: String,
          port: Int,
        ): Socket? = null

    calls++

    if (exchange != null) {
      check(exchange.finder.routePlanner.sameHostAndPort(request.url)) {
        "network interceptor ${interceptors[index - 1]} must retain the same host and port"
      }
      check(calls == 1) {
        "network interceptor ${interceptors[index - 1]} must call proceed() exactly once"
      }
    }

    // Call the next interceptor in the chain.

        // wait for yellow status
        runner.ensureYellow();

        System.setProperty(FesenClient.HTTP_ADDRESS, "localhost:" + runner.node().settings().get("http.port", "9201"));

        super.setUp();

        // logging
        System.setProperty("java.util.logging.SimpleFormatter.format", "%1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS %4$s %2$s %5$s%6$s%n");

      }
    }
  }

  private fun doSsl(socket: Socket): SSLSocket {
    val sslSocket =
      sslSocketFactory.createSocket(
        socket,
        socket.inetAddress.hostAddress,
        socket.port,
        true,
      ) as SSLSocket
    sslSocket.useClientMode = false
    Platform.get().configureTlsExtensions(sslSocket, null, listOf(Protocol.HTTP_2))
    sslSocket.startHandshake()
    return sslSocket
  }

        assertEquals("apple, banana, pear", o2);
    }

    @Test
    public void testSubstitution() throws IOException {
        String str = "port = 4141" + LINE_SEPARATOR + "host = localhost"
                + LINE_SEPARATOR + "url = https://${host}:${port}/service"
                + LINE_SEPARATOR;
        MavenProperties properties = new MavenProperties();
        properties.load(new StringReader(str));

    )
    val interceptor =
      Interceptor { chain: Interceptor.Chain ->
        val address = chain.connection()!!.route().address
        val sameHost = address.url.host
        val differentPort = address.url.port + 1
        chain.proceed(
          chain
            .request()
            .newBuilder()
            .url("http://$sameHost:$differentPort/")
            .build(),
        )
      }
    client =

    <proxy>
      <id>optional</id>
      <active>true</active>
      <protocol>http</protocol>
      <username>proxyuser</username>
      <password>proxypass</password>
      <host>proxy.host.net</host>
      <port>80</port>
      <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
    </proxy>
    -->
  </proxies>

  <!-- servers
   | This is a list of authentication profiles, keyed by the server-id used within the system.

    val connect1 = server.takeRequest()
    assertThat(connect1.requestLine).isEqualTo("CONNECT android.com:$port HTTP/1.1")
    assertThat(connect1.headers["Proxy-Authorization"]).isNull()

    val connect2 = server.takeRequest()
    assertThat(connect2.requestLine).isEqualTo("CONNECT android.com:$port HTTP/1.1")
    assertThat(connect2.headers["Proxy-Authorization"]).isEqualTo("password")

   *     is recoverable, the connection's route may be recovered for the retry.
   */
  fun hasNext(failedConnection: RealConnection? = null): Boolean

  /**
   * Returns true if the host and port are unchanged from when this was created. This is used to
   * detect if followups need to do a full connection-finding process including DNS resolution, and
   * certificate pin checks.
   */