@Test
public void shouldReturnFalseForInvalidPrefix() {
assertFalse(PrefixUtils.isLegalPrefix(Ipv6Range.parse("::0-::2")));
assertFalse(PrefixUtils.isLegalPrefix(Ipv6Range.parse("::1-::3")));
assertFalse(
PrefixUtils.isLegalPrefix(Ipv6Range.parse("::1-ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")));
assertFalse(
PrefixUtils.isLegalPrefix(Ipv6Range.parse("::-ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffe")));
assertFalse(
PrefixUtils.isLegalPrefix(Ipv6Range.parse("::2-ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffe")));
}
@Test
public void shouldFindBiggestAndSmallestPrefixWhenRangeIsNotValidPrefix() {
Ipv6Range range = Ipv6Range.from("::1").to("::4");
assertEquals(Ipv6Range.parse("::2/127"), findMaximumPrefixForPrefixLength(range, 127).get());
assertEquals(Ipv6Range.parse("::2/127"), findMinimumPrefixForPrefixLength(range, 127).get());
assertEquals(Ipv6Range.parse("::2/127"), findMaximumPrefixForPrefixLength(range, 128).get());
assertEquals(Ipv6Range.parse("::1/128"), findMinimumPrefixForPrefixLength(range, 128).get());
Ipv6Range otherRange =
Ipv6Range.from("::").to(BigInteger.valueOf(2).pow(128).subtract(BigInteger.valueOf(2)));
assertEquals(Ipv6Range.parse("::/1"), findMaximumPrefixForPrefixLength(otherRange, 1).get());
assertEquals(Ipv6Range.parse("::/1"), findMinimumPrefixForPrefixLength(otherRange, 1).get());
assertEquals(Ipv6Range.parse("::/1"), findMaximumPrefixForPrefixLength(otherRange, 2).get());
assertEquals(
Ipv6Range.parse("8000::/2"), findMinimumPrefixForPrefixLength(otherRange, 2).get());
assertEquals(Ipv6Range.parse("::/1"), findMaximumPrefixForPrefixLength(otherRange, 128).get());
assertEquals(
Ipv6Range.parse("ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffe/128"),
findMinimumPrefixForPrefixLength(otherRange, 128).get());
}
@Test(expected = IllegalArgumentException.class)
public void findSmallestPrefixShouldThrowAnExceptionWhenRequestedPrefixLengthIsTooSmall() {
findMinimumPrefixForPrefixLength(Ipv6Range.parse("::1-::10"), -1);
}
@Test
public void shouldFindBiggestAndSmallestPrefixWhenRangeIsSingleValidPrefix() {
Ipv6Range range = Ipv6Range.parse("::/0");
assertEquals(Ipv6Range.parse("::/0"), findMinimumPrefixForPrefixLength(range, 0).get());
assertEquals(Ipv6Range.parse("::/0"), findMaximumPrefixForPrefixLength(range, 128).get());
}
@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")));
}
@Test
public void shouldReturnTrueForValidPrefix() {
assertTrue(PrefixUtils.isLegalPrefix(Ipv6Range.parse("::/0")));
}
@Test(expected = IllegalArgumentException.class)
public void findBiggestPrefixShouldThrowAnExceptionWhenRequestedPrefixLengthIsTooBig() {
findMaximumPrefixForPrefixLength(Ipv6Range.parse("::1-::10"), 129);
}