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package replacer
import (
"context"
"testing"
"github.com/coredns/coredns/plugin/metadata"
"github.com/coredns/coredns/plugin/pkg/dnstest"
"github.com/coredns/coredns/plugin/test"
"github.com/coredns/coredns/request"
"github.com/miekg/dns"
)
func TestReplacer(t *testing.T) {
w := dnstest.NewRecorder(&test.ResponseWriter{})
r := new(dns.Msg)
r.SetQuestion("example.org.", dns.TypeHINFO)
r.MsgHdr.AuthenticatedData = true
state := request.Request{W: w, Req: r}
replacer := New()
if x := replacer.Replace(context.TODO(), state, nil, "{type}"); x != "HINFO" {
t.Errorf("Expected type to be HINFO, got %q", x)
}
if x := replacer.Replace(context.TODO(), state, nil, "{name}"); x != "example.org." {
t.Errorf("Expected request name to be example.org., got %q", x)
}
if x := replacer.Replace(context.TODO(), state, nil, "{size}"); x != "29" {
t.Errorf("Expected size to be 29, got %q", x)
}
}
func TestLabels(t *testing.T) {
w := dnstest.NewRecorder(&test.ResponseWriter{})
r := new(dns.Msg)
r.SetQuestion("example.org.", dns.TypeHINFO)
r.Id = 1053
r.AuthenticatedData = true
r.CheckingDisabled = true
w.WriteMsg(r)
state := request.Request{W: w, Req: r}
replacer := New()
ctx := context.TODO()
// This couples the test very tightly to the code, but so be it.
expect := map[string]string{
"{type}": "HINFO",
"{name}": "example.org.",
"{class}": "IN",
"{proto}": "udp",
"{size}": "29",
"{remote}": "10.240.0.1",
"{port}": "40212",
"{local}": "127.0.0.1",
headerReplacer + "id}": "1053",
headerReplacer + "opcode}": "0",
headerReplacer + "do}": "false",
headerReplacer + "bufsize}": "512",
"{rcode}": "NOERROR",
"{rsize}": "29",
"{duration}": "0",
headerReplacer + "rflags}": "rd,ad,cd",
}
if len(expect) != len(labels) {
t.Fatalf("Expect %d labels, got %d", len(expect), len(labels))
}
for _, lbl := range labels {
repl := replacer.Replace(ctx, state, w, lbl)
if lbl == "{duration}" {
if repl[len(repl)-1] != 's' {
t.Errorf("Expected seconds, got %q", repl)
}
continue
}
if repl != expect[lbl] {
t.Errorf("Expected value %q, got %q", expect[lbl], repl)
}
}
}
func BenchmarkReplacer(b *testing.B) {
w := dnstest.NewRecorder(&test.ResponseWriter{})
r := new(dns.Msg)
r.SetQuestion("example.org.", dns.TypeHINFO)
r.MsgHdr.AuthenticatedData = true
state := request.Request{W: w, Req: r}
b.ResetTimer()
b.ReportAllocs()
replacer := New()
for i := 0; i < b.N; i++ {
replacer.Replace(context.TODO(), state, nil, "{type} {name} {size}")
}
}
type testProvider map[string]metadata.Func
func (tp testProvider) Metadata(ctx context.Context, state request.Request) context.Context {
for k, v := range tp {
metadata.SetValueFunc(ctx, k, v)
}
return ctx
}
type testHandler struct{ ctx context.Context }
func (m *testHandler) Name() string { return "test" }
func (m *testHandler) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
m.ctx = ctx
return 0, nil
}
func TestMetadataReplacement(t *testing.T) {
tests := []struct {
expr string
result string
}{
{"{/test/meta2}", "two"},
{"{/test/meta2} {/test/key4}", "two -"},
{"{/test/meta2} {/test/meta3}", "two three"},
}
next := &testHandler{}
m := metadata.Metadata{
Zones: []string{"."},
Providers: []metadata.Provider{
testProvider{"test/meta2": func() string { return "two" }},
testProvider{"test/meta3": func() string { return "three" }},
},
Next: next,
}
m.ServeDNS(context.TODO(), &test.ResponseWriter{}, new(dns.Msg))
ctx := next.ctx // important because the m.ServeDNS has only now populated the context
w := dnstest.NewRecorder(&test.ResponseWriter{})
r := new(dns.Msg)
r.SetQuestion("example.org.", dns.TypeHINFO)
repl := New()
state := request.Request{W: w, Req: r}
for i, ts := range tests {
r := repl.Replace(ctx, state, nil, ts.expr)
if r != ts.result {
t.Errorf("Test %d - expr : %s, expected %q, got %q", i, ts.expr, ts.result, r)
}
}
}
func TestMetadataMalformed(t *testing.T) {
tests := []struct {
expr string
result string
}{
{"{/test/meta2", "{/test/meta2"},
{"{test/meta2} {/test/meta4}", "{test/meta2} -"},
{"{test}", "{test}"},
}
next := &testHandler{}
m := metadata.Metadata{
Zones: []string{"."},
Providers: []metadata.Provider{testProvider{"test/meta2": func() string { return "two" }}},
Next: next,
}
m.ServeDNS(context.TODO(), &test.ResponseWriter{}, new(dns.Msg))
ctx := next.ctx // important because the m.ServeDNS has only now populated the context
w := dnstest.NewRecorder(&test.ResponseWriter{})
r := new(dns.Msg)
r.SetQuestion("example.org.", dns.TypeHINFO)
repl := New()
state := request.Request{W: w, Req: r}
for i, ts := range tests {
r := repl.Replace(ctx, state, nil, ts.expr)
if r != ts.result {
t.Errorf("Test %d - expr : %s, expected %q, got %q", i, ts.expr, ts.result, r)
}
}
}
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