@Test(expected = IllegalArgumentException.class)
public void shouldFailToGetPrefixLengthWhenInvalidPrefix() {
PrefixUtils.getPrefixLength(Ipv6Range.parse("::0-::2"));
}
@Test
public void shouldGetPrefixLengthWhenCorrectPrefix() {
assertEquals(128, PrefixUtils.getPrefixLength(Ipv6Range.parse("::0-::0")));
assertEquals(128, PrefixUtils.getPrefixLength(Ipv6Range.parse("::1-::1")));
assertEquals(126, PrefixUtils.getPrefixLength(Ipv6Range.parse("::0-::3")));
}