public void testToUriStringIPv4() {
    String ipStr = "1.2.3.4";
    InetAddress ip = InetAddresses.forString(ipStr);
    assertThat(InetAddresses.toUriString(ip)).isEqualTo("1.2.3.4");
  }

  public void testToUriStringIPv6() {
    // Unfortunately the InetAddress.toString() method for IPv6 addresses
    // does not collapse contiguous shorts of zeroes with the :: abbreviation.
    String ipStr = "3ffe::1";