assertTrue(newIPv4.isIPv4());
        assertFalse(newIPv4.isIPv6());
        assertEquals(WitnessNotification.WitnessIPAddress.IPV4, newIPv4.getFlags());

        // Check IPv6 address
        WitnessNotification.WitnessIPAddress newIPv6 = newAddresses.get(1);
        assertEquals(ipv6, newIPv6.getAddress());
        assertFalse(newIPv6.isIPv4());
        assertTrue(newIPv6.isIPv6());

        NetworkInterfaceInfo info = new NetworkInterfaceInfo(testAddress, 1000);

        assertEquals(testAddress, info.getAddress());
        assertEquals(1000, info.getLinkSpeed());
        assertFalse(info.isIpv6());
        assertEquals(0, info.getCapability());
    }

    @Test
    void testIPv6Constructor() throws UnknownHostException {
        InetAddress ipv6Address = InetAddress.getByName("2001:db8::1");

         *
         * @return true if IPv4
         */
        public boolean isIPv4() {
            return (flags & IPV4) != 0;
        }

        /**
         * Checks if this is an IPv6 address.
         *
         * @return true if IPv6
         */
        public boolean isIPv6() {
            return (flags & IPV6) != 0;
        }
    }

    /**

   *     or IPv6 respectively
   */
  private static InetAddress fromBigInteger(BigInteger address, boolean isIpv6) {
    checkArgument(address.signum() >= 0, "BigInteger must be greater than or equal to 0");

    int numBytes = isIpv6 ? 16 : 4;

    byte[] addressBytes = address.toByteArray();
    byte[] targetCopyArray = new byte[numBytes];

     * @return IP address
     */
    public InetAddress getAddress() {
        return address;
    }

    /**
     * Check if this is an IPv6 address
     *
     * @return true if IPv6, false if IPv4
     */
    public boolean isIpv6() {
        return ipv6;
    }

    /**
     * Check if RSS is supported
     *
     * @return true if RSS capable
     */
    public boolean isRssCapable() {

   *     or IPv6 respectively
   */
  private static InetAddress fromBigInteger(BigInteger address, boolean isIpv6) {
    checkArgument(address.signum() >= 0, "BigInteger must be greater than or equal to 0");

    int numBytes = isIpv6 ? 16 : 4;

    byte[] addressBytes = address.toByteArray();
    byte[] targetCopyArray = new byte[numBytes];

        public static final int IPV6 = 0x02;
        
        public WitnessIPAddress(InetAddress address) {
            this.address = address;
            this.flags = address.getAddress().length == 4 ? IPV4 : IPV6;
        }
        
        public InetAddress getAddress() { return address; }
        public int getFlags() { return flags; }
        public boolean isIPv4() { return (flags & IPV4) != 0; }

    enableProtocol(Protocol.HTTP_2)

    val request = Request(server1.url("/"))

    server1.enqueue(refusedStream)
    server2.enqueue(bodyResponse)

    dns[server1.hostName] = listOf(ipv6, ipv4)
    socketFactory[ipv6] = server1.socketAddress
    socketFactory[ipv4] = server2.socketAddress

    client =
      client
        .newBuilder()
        .fastFallback(false)
        .apply {

internal fun reorderForHappyEyeballs(addresses: List<InetAddress>): List<InetAddress> {
  if (addresses.size < 2) {
    return addresses
  }

  val (ipv6, ipv4) = addresses.partition { it is Inet6Address }

  return if (ipv6.isEmpty() || ipv4.isEmpty()) {
    addresses
  } else {
    interleave(ipv6, ipv4)
  }

   *   <li>An IPv6 address string with or without brackets, like {@code [2001:db8::1]} or {@code
   *       2001:db8::1}
   * </ul>
   *
   * @throws IllegalArgumentException if the specifier is not valid.
   */
  public static HostSpecifier fromValid(String specifier) {
    // Verify that no port was specified, and strip optional brackets from
    // IPv6 literals.