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|
package log
import (
"bytes"
"context"
"io"
"log"
"strings"
"testing"
"github.com/coredns/coredns/plugin/pkg/dnstest"
clog "github.com/coredns/coredns/plugin/pkg/log"
"github.com/coredns/coredns/plugin/pkg/replacer"
"github.com/coredns/coredns/plugin/pkg/response"
"github.com/coredns/coredns/plugin/test"
"github.com/miekg/dns"
)
func init() { clog.Discard() }
func TestLoggedStatus(t *testing.T) {
rule := Rule{
NameScope: ".",
Format: DefaultLogFormat,
Class: map[response.Class]struct{}{response.All: {}},
}
var f bytes.Buffer
log.SetOutput(&f)
logger := Logger{
Rules: []Rule{rule},
Next: test.ErrorHandler(),
repl: replacer.New(),
}
ctx := context.TODO()
r := new(dns.Msg)
r.SetQuestion("example.org.", dns.TypeA)
rec := dnstest.NewRecorder(&test.ResponseWriter{})
rcode, _ := logger.ServeDNS(ctx, rec, r)
if rcode != 2 {
t.Errorf("Expected rcode to be 2 - was: %d", rcode)
}
logged := f.String()
if !strings.Contains(logged, "A IN example.org. udp 29 false 512") {
t.Errorf("Expected it to be logged. Logged string: %s", logged)
}
}
func TestLoggedClassDenial(t *testing.T) {
rule := Rule{
NameScope: ".",
Format: DefaultLogFormat,
Class: map[response.Class]struct{}{response.Denial: {}},
}
var f bytes.Buffer
log.SetOutput(&f)
logger := Logger{
Rules: []Rule{rule},
Next: test.ErrorHandler(),
repl: replacer.New(),
}
ctx := context.TODO()
r := new(dns.Msg)
r.SetQuestion("example.org.", dns.TypeA)
rec := dnstest.NewRecorder(&test.ResponseWriter{})
logger.ServeDNS(ctx, rec, r)
logged := f.String()
if len(logged) != 0 {
t.Errorf("Expected it not to be logged, but got string: %s", logged)
}
}
func TestLoggedClassError(t *testing.T) {
rule := Rule{
NameScope: ".",
Format: DefaultLogFormat,
Class: map[response.Class]struct{}{response.Error: {}},
}
var f bytes.Buffer
log.SetOutput(&f)
logger := Logger{
Rules: []Rule{rule},
Next: test.ErrorHandler(),
repl: replacer.New(),
}
ctx := context.TODO()
r := new(dns.Msg)
r.SetQuestion("example.org.", dns.TypeA)
rec := dnstest.NewRecorder(&test.ResponseWriter{})
logger.ServeDNS(ctx, rec, r)
logged := f.String()
if !strings.Contains(logged, "SERVFAIL") {
t.Errorf("Expected it to be logged. Logged string: %s", logged)
}
}
func TestLogged(t *testing.T) {
tests := []struct {
Rules []Rule
Domain string
ShouldLog bool
ShouldString string
ShouldNOTString string // for test format
}{
// case for NameScope
{
Rules: []Rule{
{
NameScope: "example.org.",
Format: DefaultLogFormat,
Class: map[response.Class]struct{}{response.All: {}},
},
},
Domain: "example.org.",
ShouldLog: true,
ShouldString: "A IN example.org.",
},
{
Rules: []Rule{
{
NameScope: "example.org.",
Format: DefaultLogFormat,
Class: map[response.Class]struct{}{response.All: {}},
},
},
Domain: "example.net.",
ShouldLog: false,
ShouldString: "",
},
{
Rules: []Rule{
{
NameScope: "example.org.",
Format: DefaultLogFormat,
Class: map[response.Class]struct{}{response.All: {}},
},
{
NameScope: "example.net.",
Format: DefaultLogFormat,
Class: map[response.Class]struct{}{response.All: {}},
},
},
Domain: "example.net.",
ShouldLog: true,
ShouldString: "A IN example.net.",
},
// case for format
{
Rules: []Rule{
{
NameScope: ".",
Format: "{type} {class}",
Class: map[response.Class]struct{}{response.All: {}},
},
},
Domain: "example.org.",
ShouldLog: true,
ShouldString: "A IN",
ShouldNOTString: "example.org",
},
{
Rules: []Rule{
{
NameScope: ".",
Format: "{remote}:{port}",
Class: map[response.Class]struct{}{response.All: {}},
},
},
Domain: "example.org.",
ShouldLog: true,
ShouldString: "10.240.0.1:40212",
ShouldNOTString: "A IN example.org",
},
{
Rules: []Rule{
{
NameScope: ".",
Format: CombinedLogFormat,
Class: map[response.Class]struct{}{response.All: {}},
},
},
Domain: "example.org.",
ShouldLog: true,
ShouldString: "\"0\"",
},
{
Rules: []Rule{
{
NameScope: ".",
Format: CombinedLogFormat,
Class: map[response.Class]struct{}{response.All: {}},
},
},
Domain: "foo.%s.example.org.",
ShouldLog: true,
ShouldString: "foo.%s.example.org.",
ShouldNOTString: "%!s(MISSING)",
},
}
for _, tc := range tests {
var f bytes.Buffer
log.SetOutput(&f)
logger := Logger{
Rules: tc.Rules,
Next: test.ErrorHandler(),
repl: replacer.New(),
}
ctx := context.TODO()
r := new(dns.Msg)
r.SetQuestion(tc.Domain, dns.TypeA)
rec := dnstest.NewRecorder(&test.ResponseWriter{})
_, err := logger.ServeDNS(ctx, rec, r)
if err != nil {
t.Fatal(err)
}
logged := f.String()
if !tc.ShouldLog && len(logged) != 0 {
t.Errorf("Expected it not to be logged, but got string: %s", logged)
}
if tc.ShouldLog && !strings.Contains(logged, tc.ShouldString) {
t.Errorf("Expected it to contains: %s. Logged string: %s", tc.ShouldString, logged)
}
if tc.ShouldLog && tc.ShouldNOTString != "" && strings.Contains(logged, tc.ShouldNOTString) {
t.Errorf("Expected it to NOT contains: %s. Logged string: %s", tc.ShouldNOTString, logged)
}
}
}
func BenchmarkLogged(b *testing.B) {
log.SetOutput(io.Discard)
rule := Rule{
NameScope: ".",
Format: DefaultLogFormat,
Class: map[response.Class]struct{}{response.All: {}},
}
logger := Logger{
Rules: []Rule{rule},
Next: test.ErrorHandler(),
repl: replacer.New(),
}
ctx := context.TODO()
r := new(dns.Msg)
r.SetQuestion("example.org.", dns.TypeA)
rec := dnstest.NewRecorder(&test.ResponseWriter{})
b.StartTimer()
for i := 0; i < b.N; i++ {
logger.ServeDNS(ctx, rec, r)
}
}
|
