}

  public void testIPv6AddressWithBadScopeId() throws SocketException, UnknownHostException {
    assertThrows(
        IllegalArgumentException.class,
        () -> InetAddresses.forString("1180::b059:65f4:e877:c40%eth9"));
  }

  public void testToAddrStringIPv4() {
    // Don't need to test IPv4 much; it just calls getHostAddress().
    assertEquals("1.2.3.4", InetAddresses.toAddrString(InetAddresses.forString("1.2.3.4")));
  }

   *
   * @param ipString {@code String} containing an IPv4 or IPv6 string literal, e.g. {@code
   *     "192.168.0.1"} or {@code "2001:db8::1"} or with a scope ID, e.g. {@code "2001:db8::1%eth0"}
   * @return {@link InetAddress} representing the argument
   * @throws IllegalArgumentException if the argument is not a valid IP string literal
   */
  @CanIgnoreReturnValue // TODO(b/219820829): consider removing

   *
   * @param ipString {@code String} containing an IPv4 or IPv6 string literal, e.g. {@code
   *     "192.168.0.1"} or {@code "2001:db8::1"} or with a scope ID, e.g. {@code "2001:db8::1%eth0"}
   * @return {@link InetAddress} representing the argument
   * @throws IllegalArgumentException if the argument is not a valid IP string literal
   */
  @CanIgnoreReturnValue // TODO(b/219820829): consider removing