117 lines
2.5 KiB
Go
117 lines
2.5 KiB
Go
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package dns_test
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import (
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"github.com/miekg/dns"
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"strings"
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"testing"
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)
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const TypeISBN uint16 = 0x0F01
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// sorry DNS RFC writers, here we go with crazy idea test :)
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type ISBN struct {
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x string // rdata with 10 or 13 numbers, dashes or spaces allowed
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}
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func (rd *ISBN) String() string { return rd.x }
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func (rd *ISBN) ReadText(txt []string) error { rd.x = strings.Join(txt, " "); return nil }
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func NewISBN() dns.CustomRData { return &ISBN{""} }
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var testrecord = "example.org.\t3600\tIN\tISBN\t12-3 456789-0-123"
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func (rd *ISBN) Write(buf []byte) (int, error) {
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b := []byte(rd.x)
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n := copy(buf, b)
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if n != len(b) {
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return n, dns.ErrBuf
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}
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return n, nil
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}
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func (rd *ISBN) Read(buf []byte) (int, error) {
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rd.x = string(buf)
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return len(buf), nil
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}
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func (rd *ISBN) CopyTo(dest dns.CustomRData) error {
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isbn, ok := dest.(*ISBN)
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if !ok {
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return dns.ErrRdata
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}
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isbn.x = rd.x
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return nil
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}
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func TestCustomText(t *testing.T) {
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dns.RegisterCustomRR("ISBN", TypeISBN, NewISBN)
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defer dns.UnregisterCustomRR(TypeISBN)
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rr, err := dns.NewRR(testrecord)
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if err != nil {
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t.Fatal(err)
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}
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if rr.String() != testrecord {
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t.Errorf("Record string representation did not match original %#v != %#v", rr.String(), testrecord)
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} else {
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t.Log(rr.String())
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}
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}
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func TestCustomWire(t *testing.T) {
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dns.RegisterCustomRR("ISBN", TypeISBN, NewISBN)
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defer dns.UnregisterCustomRR(TypeISBN)
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rr, err := dns.NewRR(testrecord)
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if err != nil {
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t.Fatal(err)
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}
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buf := make([]byte, 100)
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off, err := dns.PackRR(rr, buf, 0, nil, false)
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if err != nil {
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t.Errorf("Got error packing ISBN: %s", err)
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}
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if ln := 40; ln != off {
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t.Errorf("Offset is not matching to length of custom RR: %d!=%d", off, ln)
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}
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rr1, off1, err := dns.UnpackRR(buf[:off], 0)
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if err != nil {
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t.Errorf("Got error unpacking ISBN: %s", err)
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}
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if off1 != off {
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t.Errorf("Offset after unpacking differs: %d != %d", off1, off)
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}
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if rr1.String() != testrecord {
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t.Errorf("Record string representation did not match original %#v != %#v", rr1.String(), testrecord)
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} else {
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t.Log(rr1.String())
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}
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}
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var smallzone = `$ORIGIN example.org.
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@ SOA sns.dns.icann.org. noc.dns.icann.org. 2014091518 7200 3600 1209600 3600
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A 1.2.3.4
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ok ISBN 1231-92110-12
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go ISBN 1231-92110-13
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www ISBN 1231-92110-16
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* CNAME @
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`
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func TestCustomZoneParser(t *testing.T) {
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dns.RegisterCustomRR("ISBN", TypeISBN, NewISBN)
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defer dns.UnregisterCustomRR(TypeISBN)
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r := strings.NewReader(smallzone)
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for x := range dns.ParseZone(r, ".", "") {
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if err := x.Error; err != nil {
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t.Fatal(err)
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}
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t.Log(x.RR)
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}
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}
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