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package errors
import (
"bytes"
"context"
"errors"
"fmt"
"log"
"strings"
"testing"
"github.com/coredns/coredns/plugin"
"github.com/coredns/coredns/plugin/pkg/dnstest"
"github.com/coredns/coredns/plugin/test"
"github.com/miekg/dns"
)
func TestErrors(t *testing.T) {
buf := bytes.Buffer{}
em := errorHandler{Log: log.New(&buf, "", 0)}
testErr := errors.New("test error")
tests := []struct {
next plugin.Handler
expectedCode int
expectedLog string
expectedErr error
}{
{
next: genErrorHandler(dns.RcodeSuccess, nil),
expectedCode: dns.RcodeSuccess,
expectedLog: "",
expectedErr: nil,
},
{
next: genErrorHandler(dns.RcodeNotAuth, testErr),
expectedCode: dns.RcodeNotAuth,
expectedLog: fmt.Sprintf("[ERROR %d %s] %v\n", dns.RcodeNotAuth, "example.org. A", testErr),
expectedErr: testErr,
},
}
ctx := context.TODO()
req := new(dns.Msg)
req.SetQuestion("example.org.", dns.TypeA)
for i, tc := range tests {
em.Next = tc.next
buf.Reset()
rec := dnstest.NewRecorder(&test.ResponseWriter{})
code, err := em.ServeDNS(ctx, rec, req)
if err != tc.expectedErr {
t.Errorf("Test %d: Expected error %v, but got %v",
i, tc.expectedErr, err)
}
if code != tc.expectedCode {
t.Errorf("Test %d: Expected status code %d, but got %d",
i, tc.expectedCode, code)
}
if log := buf.String(); !strings.Contains(log, tc.expectedLog) {
t.Errorf("Test %d: Expected log %q, but got %q",
i, tc.expectedLog, log)
}
}
}
func genErrorHandler(rcode int, err error) plugin.Handler {
return plugin.HandlerFunc(func(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
return rcode, err
})
}
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