Files
coredns/request/writer_test.go
Ville Vesilehto 2f9f30934a test(request): improve coverage across package (#7307)
Add tests for previously untested functions:
- edns0.go: test supportedOptions function
- request.go: test address methods, protocol handling, and EDNS0
  options
- writer.go: test ScrubWriter implementation

Improves overall package test coverage from 39.5% to 77.8%.

Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>
2025-05-19 14:23:58 -04:00

52 lines
1.1 KiB
Go

package request
import (
"fmt"
"testing"
"github.com/coredns/coredns/plugin/test"
"github.com/miekg/dns"
)
// mockResponseWriter implements dns.ResponseWriter interface for testing
type mockResponseWriter struct {
test.ResponseWriter
lastMsg *dns.Msg
}
func (m *mockResponseWriter) WriteMsg(msg *dns.Msg) error {
m.lastMsg = msg
return nil
}
func TestScrubWriter(t *testing.T) {
req := new(dns.Msg)
req.SetQuestion("example.com.", dns.TypeA)
req.SetEdns0(4096, true)
mock := &mockResponseWriter{}
sw := NewScrubWriter(req, mock)
// Create a large response message
resp := new(dns.Msg)
resp.SetReply(req)
// Add a lot of records to make it large
for i := 1; i < 100; i++ {
resp.Answer = append(resp.Answer, test.A(
fmt.Sprintf("example.com. 10 IN A 10.0.0.%d", i)))
}
// Write the message through ScrubWriter
err := sw.WriteMsg(resp)
if err != nil {
t.Errorf("Expected no error, got: %v", err)
}
// Verify that ScrubWriter called methods properly
if mock.lastMsg == nil {
t.Fatalf("Expected WriteMsg to be called with a message")
}
}