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package netiputil
import (
"net/netip"
"testing"
"gotest.tools/v3/assert"
)
func TestLastAddr(t *testing.T) {
testcases := []struct {
p netip.Prefix
want netip.Addr
}{
{netip.MustParsePrefix("10.0.0.0/24"), netip.MustParseAddr("10.0.0.255")},
{netip.MustParsePrefix("10.0.0.0/8"), netip.MustParseAddr("10.255.255.255")},
{netip.MustParsePrefix("fd00::/64"), netip.MustParseAddr("fd00::ffff:ffff:ffff:ffff")},
{netip.MustParsePrefix("fd00::/16"), netip.MustParseAddr("fd00:ffff:ffff:ffff:ffff:ffff:ffff:ffff")},
{netip.MustParsePrefix("ffff::/16"), netip.MustParseAddr("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")},
}
for _, tc := range testcases {
last := LastAddr(tc.p)
assert.Check(t, last == tc.want, "LastAddr(%q) = %s; want: %s", tc.p, last, tc.want)
}
}
func TestPrefixAfter(t *testing.T) {
testcases := []struct {
prev netip.Prefix
sz int
want netip.Prefix
}{
{netip.MustParsePrefix("10.0.10.0/24"), 24, netip.MustParsePrefix("10.0.11.0/24")},
{netip.MustParsePrefix("10.0.10.0/24"), 16, netip.MustParsePrefix("10.1.0.0/16")},
{netip.MustParsePrefix("10.10.0.0/16"), 24, netip.MustParsePrefix("10.11.0.0/24")},
{netip.MustParsePrefix("2001:db8:feed:cafe:b000:dead::/96"), 16, netip.MustParsePrefix("2002::/16")},
{netip.MustParsePrefix("ffff::/16"), 16, netip.Prefix{}},
{netip.MustParsePrefix("2001:db8:1::/48"), 64, netip.MustParsePrefix("2001:db8:2::/64")},
}
for _, tc := range testcases {
next := PrefixAfter(tc.prev, tc.sz)
assert.Check(t, next == tc.want, "PrefixAfter(%q, %d) = %s; want: %s", tc.prev, tc.sz, next, tc.want)
}
}
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