@Test
public void testToStringAddress2() {

    assertThat(NetUtil.toStringAddress(ipv4)).isEqualTo(
        ipv4.getAddress().getHostAddress() + ":" + ipv4.getPort());
    assertThat(NetUtil.toStringAddress(ipv6)).isEqualTo(
        ipv6.getAddress().getHostAddress() + ":" + ipv6.getPort());
}