got := fmt.Sprintf("%s", values)
	want := `[invalid IP 1.2.3.4 8.8.8.8 ::1 ::1%foo ::2]`
	if got != want {
		t.Errorf("unexpected sort\n got: %s\nwant: %s\n", got, want)
	}
}

func TestAddrPortCompare(t *testing.T) {
	tests := []struct {
		a, b AddrPort
		want int
	}{
		{AddrPort{}, AddrPort{}, 0},
		{AddrPort{}, mustIPPort("1.2.3.4:80"), -1},