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package file
import (
"strings"
"testing"
"github.com/coredns/coredns/plugin/pkg/dnsrecorder"
"github.com/coredns/coredns/plugin/proxy"
"github.com/coredns/coredns/plugin/test"
"github.com/miekg/dns"
"golang.org/x/net/context"
)
func TestLookupCNAMEChain(t *testing.T) {
name := "example.org."
zone, err := Parse(strings.NewReader(dbExampleCNAME), name, "stdin", 0)
if err != nil {
t.Fatalf("Expected no error when reading zone, got %q", err)
}
fm := File{Next: test.ErrorHandler(), Zones: Zones{Z: map[string]*Zone{name: zone}, Names: []string{name}}}
ctx := context.TODO()
for _, tc := range cnameTestCases {
m := tc.Msg()
rec := dnsrecorder.New(&test.ResponseWriter{})
_, err := fm.ServeDNS(ctx, rec, m)
if err != nil {
t.Errorf("Expected no error, got %v\n", err)
return
}
resp := rec.Msg
test.SortAndCheck(t, resp, tc)
}
}
var cnameTestCases = []test.Case{
{
Qname: "a.example.org.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.A("a.example.org. 1800 IN A 127.0.0.1"),
},
},
{
Qname: "www3.example.org.", Qtype: dns.TypeCNAME,
Answer: []dns.RR{
test.CNAME("www3.example.org. 1800 IN CNAME www2.example.org."),
},
},
{
Qname: "dangling.example.org.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.CNAME("dangling.example.org. 1800 IN CNAME foo.example.org."),
},
},
{
Qname: "www3.example.org.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.A("a.example.org. 1800 IN A 127.0.0.1"),
test.CNAME("www.example.org. 1800 IN CNAME a.example.org."),
test.CNAME("www1.example.org. 1800 IN CNAME www.example.org."),
test.CNAME("www2.example.org. 1800 IN CNAME www1.example.org."),
test.CNAME("www3.example.org. 1800 IN CNAME www2.example.org."),
},
},
}
func TestLookupCNAMEExternal(t *testing.T) {
name := "example.org."
zone, err := Parse(strings.NewReader(dbExampleCNAME), name, "stdin", 0)
if err != nil {
t.Fatalf("Expected no error when reading zone, got %q", err)
}
zone.Proxy = proxy.NewLookup([]string{"8.8.8.8:53"}) // TODO(miek): point to local instance
fm := File{Next: test.ErrorHandler(), Zones: Zones{Z: map[string]*Zone{name: zone}, Names: []string{name}}}
ctx := context.TODO()
for _, tc := range exernalTestCases {
m := tc.Msg()
rec := dnsrecorder.New(&test.ResponseWriter{})
_, err := fm.ServeDNS(ctx, rec, m)
if err != nil {
t.Errorf("Expected no error, got %v\n", err)
return
}
resp := rec.Msg
test.SortAndCheck(t, resp, tc)
}
}
var exernalTestCases = []test.Case{
{
Qname: "external.example.org.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.CNAME("external.example.org. 1800 CNAME www.example.net."),
// magic 303 TTL that says: don't check TTL.
test.A("www.example.net. 303 IN A 93.184.216.34"),
},
},
}
const dbExampleCNAME = `
$TTL 30M
$ORIGIN example.org.
@ IN SOA linode.atoom.net. miek.miek.nl. (
1282630057 ; Serial
4H ; Refresh
1H ; Retry
7D ; Expire
4H ) ; Negative Cache TTL
a IN A 127.0.0.1
www3 IN CNAME www2
www2 IN CNAME www1
www1 IN CNAME www
www IN CNAME a
dangling IN CNAME foo
external IN CNAME www.example.net.`
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