IllegalArgumentException.class,
          () -> InetAddresses.getIsatapIPv4Address((Inet6Address) ip));
    }
  }

  public void testGetEmbeddedIPv4ClientAddress() {
    Inet6Address testIp;

    // Test regular global unicast address.
    testIp = (Inet6Address) InetAddresses.forString("2001:db8::1");