assertEquals(123, HostAndPort.fromString("host").getPortOrDefault(123));
  }

  public void testHashCodeAndEquals() {
    HostAndPort hpNoPort1 = HostAndPort.fromString("foo::123");
    HostAndPort hpNoPort2 = HostAndPort.fromString("foo::123");
    HostAndPort hpNoPort3 = HostAndPort.fromString("[foo::123]");
    HostAndPort hpNoPort4 = HostAndPort.fromHost("[foo::123]");

    }


    @Override
    public Collection<HostAndPort> getHostsForAuthentication() {
        return hosts;
    }


    @Override
    public void addHost(String host, int port) {
        hosts.add(new DefaultHostAndPort(host, port));
    }

    private static class DefaultHostAndPort implements HostAndPort {
        private final String host;
        private final int port;

        final SMailPostalMotorbike motorbike = new SMailPostalMotorbike();
        final String hostAndPort = fessConfig.getMailSmtpServerMainHostAndPort();
        final List<String> hostPortList = DfStringUtil.splitListTrimmed(hostAndPort, ":");
        motorbike.registerConnectionInfo(hostPortList.get(0), Integer.parseInt(hostPortList.get(1)));

    Class<? extends Authentication> getType();

    boolean requiresCredentials();

    void addHost(String host, int port);

    Collection<HostAndPort> getHostsForAuthentication();

    interface HostAndPort {

        /**
         * The hostname that the credentials are required for.
         *
         * null means "any host"
         */
        String getHost();

        /**

      if (!path.startsWith("/")) {
        path = "/"
      }
      this.path = path

      val scheme = if (socket is SSLSocket) "https" else "http"
      val localPort = socket.localPort
      val hostAndPort =
        headers[":authority"]
          ?: headers["Host"]
          ?: when (val inetAddress = socket.localAddress) {
            is Inet6Address -> "[${inetAddress.hostAddress}]:$localPort"

   */
  public static HostSpecifier fromValid(String specifier) {
    // Verify that no port was specified, and strip optional brackets from
    // IPv6 literals.
    HostAndPort parsedHost = HostAndPort.fromString(specifier);
    Preconditions.checkArgument(!parsedHost.hasPort());
    String host = parsedHost.getHost();

    // Try to interpret the specifier as an IP address. Note we build

   */
  public static HostSpecifier fromValid(String specifier) {
    // Verify that no port was specified, and strip optional brackets from
    // IPv6 literals.
    HostAndPort parsedHost = HostAndPort.fromString(specifier);
    Preconditions.checkArgument(!parsedHost.hasPort());
    String host = parsedHost.getHost();

    // Try to interpret the specifier as an IP address. Note we build