coredns/plugin/kubernetes/setup_reverse_test.go

package kubernetes

import (
	"testing"

	"github.com/caddyserver/caddy"
)

func TestKubernetesParseReverseZone(t *testing.T) {
	tests := []struct {
		input         string   // Corefile data as string
		expectedZones []string // expected count of defined zones.
	}{
		{`kubernetes coredns.local 10.0.0.0/16`, []string{"coredns.local.", "0.10.in-addr.arpa."}},
		{`kubernetes coredns.local 10.0.0.0/17`, []string{"coredns.local.", "0.10.in-addr.arpa."}},
		{`kubernetes coredns.local fd00:77:30::0/110`, []string{"coredns.local.", "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.7.7.0.0.0.0.d.f.ip6.arpa."}},
	}

	for i, tc := range tests {
		c := caddy.NewTestController("dns", tc.input)
		k, err := kubernetesParse(c)
		if err != nil {
			t.Fatalf("Test %d: Expected no error, got %q", i, err)
		}

		zl := len(k.Zones)
		if zl != len(tc.expectedZones) {
			t.Errorf("Test %d: Expected kubernetes to be initialized with %d zones, found %d zones", i, len(tc.expectedZones), zl)
		}
		for i, z := range tc.expectedZones {
			if k.Zones[i] != z {
				t.Errorf("Test %d: Expected zones to be %q, got %q", i, z, k.Zones[i])
			}
		}
	}
}