@Test
public void testTurningOfTheCentury() {

    Ip eve = new Ip(Integer.MAX_VALUE);
    assertEquals("Minimal address not created", "127.255.255.255", eve.addr());
    Ip dawn = new Ip(Integer.MAX_VALUE + 1L);
    assertEquals("Minimal address not created", "128.0.0.0", dawn.addr());
}