95 lines
2.3 KiB
Go
95 lines
2.3 KiB
Go
package errors
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import (
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"bytes"
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"errors"
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"fmt"
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"log"
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"strings"
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"testing"
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"golang.org/x/net/context"
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"github.com/miekg/coredns/middleware"
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"github.com/miekg/dns"
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)
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func TestErrors(t *testing.T) {
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buf := bytes.Buffer{}
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em := ErrorHandler{Log: log.New(&buf, "", 0)}
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testErr := errors.New("test error")
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tests := []struct {
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next middleware.Handler
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expectedCode int
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expectedLog string
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expectedErr error
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}{
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{
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next: genErrorHandler(dns.RcodeSuccess, nil),
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expectedCode: dns.RcodeSuccess,
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expectedLog: "",
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expectedErr: nil,
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},
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{
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next: genErrorHandler(dns.RcodeNotAuth, testErr),
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expectedCode: dns.RcodeNotAuth,
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expectedLog: fmt.Sprintf("[ERROR %d %s] %v\n", dns.RcodeNotAuth, "example.org. A", testErr),
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expectedErr: testErr,
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},
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}
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ctx := context.TODO()
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req := new(dns.Msg)
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req.SetQuestion("example.org.", dns.TypeA)
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for i, test := range tests {
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em.Next = test.next
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buf.Reset()
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rec := middleware.NewResponseRecorder(&middleware.TestResponseWriter{})
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code, err := em.ServeDNS(ctx, rec, req)
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if err != test.expectedErr {
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t.Errorf("Test %d: Expected error %v, but got %v",
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i, test.expectedErr, err)
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}
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if code != test.expectedCode {
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t.Errorf("Test %d: Expected status code %d, but got %d",
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i, test.expectedCode, code)
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}
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if log := buf.String(); !strings.Contains(log, test.expectedLog) {
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t.Errorf("Test %d: Expected log %q, but got %q",
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i, test.expectedLog, log)
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}
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}
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}
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func TestVisibleErrorWithPanic(t *testing.T) {
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const panicMsg = "I'm a panic"
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eh := ErrorHandler{
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Debug: true,
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Next: middleware.HandlerFunc(func(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
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panic(panicMsg)
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}),
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}
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ctx := context.TODO()
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req := new(dns.Msg)
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req.SetQuestion("example.org.", dns.TypeA)
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rec := middleware.NewResponseRecorder(&middleware.TestResponseWriter{})
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code, err := eh.ServeDNS(ctx, rec, req)
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if code != 0 {
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t.Errorf("Expected error handler to return 0 (it should write to response), got status %d", code)
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}
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if err != nil {
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t.Errorf("Expected error handler to return nil error (it should panic!), but got '%v'", err)
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}
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}
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func genErrorHandler(rcode int, err error) middleware.Handler {
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return middleware.HandlerFunc(func(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
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return rcode, err
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})
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}
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