*
 * The host identifies the webserver that serves the URL's resource. It is either a hostname like
 * `square.com` or `localhost`, an IPv4 address like `192.168.0.1`, or an IPv6 address like `::1`.
 *
 * Usually a webserver is reachable with multiple identifiers: its IP addresses, registered
 * domain names, and even `localhost` when connecting from the server itself. Each of a web server's

    mockWebServer: MockWebServer,
  ) {
    setUp(protocol, mockWebServer)
    server.enqueue(
      MockResponse(
        code = 407,
        headers = headersOf("Proxy-Authenticate", "Basic realm=\"localhost\""),
        inTunnel = true,
      ),
    )
    server.enqueue(MockResponse(inTunnel = true))
    server.enqueue(MockResponse(body = "response body"))
    val client =
      client.newBuilder()

  fun authenticatingTunnelProxyConnect() {
    enableTlsWithTunnel()
    server.enqueue(
      MockResponse.Builder()
        .inTunnel()
        .code(407)
        .addHeader("Proxy-Authenticate: Basic realm=\"localhost\"")
        .addHeader("Connection: close")
        .build(),
    )
    server.enqueue(
      MockResponse.Builder()
        .inTunnel()
        .build(),
    )
    server.enqueue(MockResponse())