public void testDecrementIPv6() throws UnknownHostException {
InetAddress addressV6660 = InetAddress.getByName("2001:db8::6600");
InetAddress addressV666ff = InetAddress.getByName("2001:db8::66ff");
InetAddress addressV6670 = InetAddress.getByName("2001:db8::6700");
InetAddress address = addressV6670;
address = InetAddresses.decrement(address);
assertEquals(addressV666ff, address);
for (int i = 0; i < 255; i++) {
address = InetAddresses.decrement(address);
}
assertEquals(addressV6660, address);
InetAddress addressV6000000 = InetAddress.getByName("0:0:0:0:0:0:0:0");
address = addressV6000000;
try {
address = InetAddresses.decrement(address);
fail();
} catch (IllegalArgumentException expected) {
}
}
public void testDecrementIPv4() throws UnknownHostException {
InetAddress address660 = InetAddress.getByName("172.24.66.0");
InetAddress address66255 = InetAddress.getByName("172.24.66.255");
InetAddress address670 = InetAddress.getByName("172.24.67.0");
InetAddress address = address670;
address = InetAddresses.decrement(address);
assertEquals(address66255, address);
for (int i = 0; i < 255; i++) {
address = InetAddresses.decrement(address);
}
assertEquals(address660, address);
InetAddress address0000 = InetAddress.getByName("0.0.0.0");
address = address0000;
try {
address = InetAddresses.decrement(address);
fail();
} catch (IllegalArgumentException expected) {
}
}