1package dns

2

3import (

4 "errors"

5 "testing"

6)

7

8func TestParseDomain(t *testing.T) {

9 test := func(lax bool, s string, exp Domain, expErr error) {

10 t.Helper()

11 var dom Domain

12 var err error

13 if lax {

14 dom, err = ParseDomainLax(s)

15 } else {

16 dom, err = ParseDomain(s)

17 }

18 if (err == nil) != (expErr == nil) || expErr != nil && !errors.Is(err, expErr) {

19 t.Fatalf("parse domain %q: err %v, expected %v", s, err, expErr)

20 }

21 if expErr == nil && dom != exp {

22 t.Fatalf("parse domain %q: got %#v, epxected %#v", s, dom, exp)

23 }

24 }

25

26 // We rely on normalization of names throughout the code base.

27 test(false, "xmox.nl", Domain{"xmox.nl", ""}, nil)

28 test(false, "XMOX.NL", Domain{"xmox.nl", ""}, nil)

29 test(false, "TEST☺.XMOX.NL", Domain{"xn--test-3o3b.xmox.nl", "test☺.xmox.nl"}, nil)

30 test(false, "TEST☺.XMOX.NL", Domain{"xn--test-3o3b.xmox.nl", "test☺.xmox.nl"}, nil)

31 test(false, "ℂᵤⓇℒ。𝐒🄴", Domain{"curl.se", ""}, nil) // https://daniel.haxx.se/blog/2022/12/14/idn-is-crazy/

32 test(false, "xmox.nl.", Domain{}, errTrailingDot)

33

34 test(false, "_underscore.xmox.nl", Domain{}, errIDNA)

35 test(true, "_underscore.xmox.NL", Domain{ASCII: "_underscore.xmox.nl"}, nil)

36 test(true, "_underscore.☺.xmox.nl", Domain{}, errUnderscore)

37 test(true, "_underscore.xn--test-3o3b.xmox.nl", Domain{}, errUnderscore)

38}

39