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	An apex only zone returns the wrong answer, document this by adding a test. Closes: #4374 Signed-off-by: Miek Gieben <miek@miek.nl>
		
			
				
	
	
		
			46 lines
		
	
	
		
			1.6 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			46 lines
		
	
	
		
			1.6 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
package file
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import (
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	"context"
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	"strings"
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	"testing"
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	"github.com/coredns/coredns/plugin/pkg/dnstest"
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	"github.com/coredns/coredns/plugin/test"
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	"github.com/miekg/dns"
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)
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const exampleApexOnly = `$ORIGIN example.com.
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@   IN      SOA     ns1.example.com. admin.example.com.  (
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                               2005011437 ; Serial
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                               1200       ; Refresh
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                               144        ; Retry
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                               1814400    ; Expire
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                               2h )       ; Minimum
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@           IN  NS      ns1.example.com.
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`
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func TestLookupApex(t *testing.T) {
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	// this tests a zone with *only* an apex. The behavior here is wrong, we should return NODATA, but we do a NXDOMAIN.
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	// Adding this test to document this. Note a zone that doesn't have any data is pretty useless anyway, so rather than
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	// fix this with an entirely new branch in lookup.go, just live with it.
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	zone, err := Parse(strings.NewReader(exampleApexOnly), "example.com.", "stdin", 0)
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	if err != nil {
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		t.Fatalf("Expected no error when reading zone, got %q", err)
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	}
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	fm := File{Next: test.ErrorHandler(), Zones: Zones{Z: map[string]*Zone{"example.com.": zone}, Names: []string{"example.com."}}}
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	ctx := context.TODO()
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	m := new(dns.Msg)
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	m.SetQuestion("example.com.", dns.TypeA)
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	rec := dnstest.NewRecorder(&test.ResponseWriter{})
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	if _, err := fm.ServeDNS(ctx, rec, m); err != nil {
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		t.Errorf("Expected no error, got %v", err)
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	}
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	if rec.Msg.Rcode != dns.RcodeNameError { // Should be RcodeSuccess in a perfect world.
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		t.Errorf("Expected rcode %d, got %d", dns.RcodeNameError, rec.Msg.Rcode)
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	}
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}
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