1package smtpclient

2

3import (

4 "context"

5 "net"

6 "reflect"

7 "testing"

8 "time"

9

10 "github.com/mjl-/mox/dns"

11 "github.com/mjl-/mox/mlog"

12)

13

14func TestDialHost(t *testing.T) {

15 // We mostly want to test that dialing a second time switches to the other address family.

16 ctxbg := context.Background()

17 log := mlog.New("smtpclient", nil)

18

19 resolver := dns.MockResolver{

20 A: map[string][]string{

21 "dualstack.example.": {"10.0.0.1"},

22 },

23 AAAA: map[string][]string{

24 "dualstack.example.": {"2001:db8::1"},

25 },

26 }

27

28 DialHook = func(ctx context.Context, dialer Dialer, timeout time.Duration, addr string, laddr net.Addr) (net.Conn, error) {

29 return nil, nil // No error, nil connection isn't used.

30 }

31 defer func() {

32 DialHook = nil

33 }()

34

35 ipdomain := func(s string) dns.IPDomain {

36 return dns.IPDomain{Domain: dns.Domain{ASCII: s}}

37 }

38

39 dialedIPs := map[string][]net.IP{}

40 _, _, _, ips, dualstack, err := GatherIPs(ctxbg, log.Logger, resolver, "ip", ipdomain("dualstack.example"), dialedIPs)

41 if err != nil || !reflect.DeepEqual(ips, []net.IP{net.ParseIP("10.0.0.1"), net.ParseIP("2001:db8::1")}) || !dualstack {

42 t.Fatalf("expected err nil, address 10.0.0.1,2001:db8::1, dualstack true, got %v %v %v", err, ips, dualstack)

43 }

44 _, ip, err := Dial(ctxbg, log.Logger, nil, ipdomain("dualstack.example"), ips, 25, dialedIPs, nil)

45 if err != nil || ip.String() != "10.0.0.1" {

46 t.Fatalf("expected err nil, address 10.0.0.1, dualstack true, got %v %v %v", err, ip, dualstack)

47 }

48

49 _, _, _, ips, dualstack, err = GatherIPs(ctxbg, log.Logger, resolver, "ip", ipdomain("dualstack.example"), dialedIPs)

50 if err != nil || !reflect.DeepEqual(ips, []net.IP{net.ParseIP("2001:db8::1"), net.ParseIP("10.0.0.1")}) || !dualstack {

51 t.Fatalf("expected err nil, address 2001:db8::1,10.0.0.1, dualstack true, got %v %v %v", err, ips, dualstack)

52 }

53 _, ip, err = Dial(ctxbg, log.Logger, nil, ipdomain("dualstack.example"), ips, 25, dialedIPs, nil)

54 if err != nil || ip.String() != "2001:db8::1" {

55 t.Fatalf("expected err nil, address 2001:db8::1, dualstack true, got %v %v %v", err, ip, dualstack)

56 }

57}

58