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Change coredns testing to fix failing tests #4245

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Feb 9, 2024
Merged

Change coredns testing to fix failing tests #4245

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118 changes: 61 additions & 57 deletions provider/coredns/coredns_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -23,27 +23,30 @@ import (

"sigs.k8s.io/external-dns/endpoint"
"sigs.k8s.io/external-dns/plan"

"github.com/stretchr/testify/require"
)

const defaultCoreDNSPrefix = "/skydns/"

type fakeETCDClient struct {
services map[string]*Service
services map[string]Service
}

func (c fakeETCDClient) GetServices(prefix string) ([]*Service, error) {
var result []*Service
for key, value := range c.services {
if strings.HasPrefix(key, prefix) {
value.Key = key
result = append(result, value)
valueCopy := value
valueCopy.Key = key
result = append(result, &valueCopy)
}
}
return result, nil
}

func (c fakeETCDClient) SaveService(service *Service) error {
c.services[service.Key] = service
c.services[service.Key] = *service
return nil
}

Expand All @@ -58,7 +61,7 @@ func TestAServiceTranslation(t *testing.T) {
expectedRecordType := endpoint.RecordTypeA

client := fakeETCDClient{
map[string]*Service{
map[string]Service{
"/skydns/com/example": {Host: expectedTarget},
},
}
Expand All @@ -67,9 +70,7 @@ func TestAServiceTranslation(t *testing.T) {
coreDNSPrefix: defaultCoreDNSPrefix,
}
endpoints, err := provider.Records(context.Background())
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
if len(endpoints) != 1 {
t.Fatalf("got unexpected number of endpoints: %d", len(endpoints))
}
Expand All @@ -90,7 +91,7 @@ func TestCNAMEServiceTranslation(t *testing.T) {
expectedRecordType := endpoint.RecordTypeCNAME

client := fakeETCDClient{
map[string]*Service{
map[string]Service{
"/skydns/com/example": {Host: expectedTarget},
},
}
Expand All @@ -99,9 +100,7 @@ func TestCNAMEServiceTranslation(t *testing.T) {
coreDNSPrefix: defaultCoreDNSPrefix,
}
endpoints, err := provider.Records(context.Background())
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
if len(endpoints) != 1 {
t.Fatalf("got unexpected number of endpoints: %d", len(endpoints))
}
Expand All @@ -122,7 +121,7 @@ func TestTXTServiceTranslation(t *testing.T) {
expectedRecordType := endpoint.RecordTypeTXT

client := fakeETCDClient{
map[string]*Service{
map[string]Service{
"/skydns/com/example": {Text: expectedTarget},
},
}
Expand All @@ -131,9 +130,7 @@ func TestTXTServiceTranslation(t *testing.T) {
coreDNSPrefix: defaultCoreDNSPrefix,
}
endpoints, err := provider.Records(context.Background())
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
if len(endpoints) != 1 {
t.Fatalf("got unexpected number of endpoints: %d", len(endpoints))
}
Expand All @@ -156,7 +153,7 @@ func TestAWithTXTServiceTranslation(t *testing.T) {
expectedDNSName := "example.com"

client := fakeETCDClient{
map[string]*Service{
map[string]Service{
"/skydns/com/example": {Host: "1.2.3.4", Text: "string"},
},
}
Expand All @@ -165,9 +162,7 @@ func TestAWithTXTServiceTranslation(t *testing.T) {
coreDNSPrefix: defaultCoreDNSPrefix,
}
endpoints, err := provider.Records(context.Background())
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
if len(endpoints) != len(expectedTargets) {
t.Fatalf("got unexpected number of endpoints: %d", len(endpoints))
}
Expand Down Expand Up @@ -198,7 +193,7 @@ func TestCNAMEWithTXTServiceTranslation(t *testing.T) {
expectedDNSName := "example.com"

client := fakeETCDClient{
map[string]*Service{
map[string]Service{
"/skydns/com/example": {Host: "example.net", Text: "string"},
},
}
Expand All @@ -207,9 +202,7 @@ func TestCNAMEWithTXTServiceTranslation(t *testing.T) {
coreDNSPrefix: defaultCoreDNSPrefix,
}
endpoints, err := provider.Records(context.Background())
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
if len(endpoints) != len(expectedTargets) {
t.Fatalf("got unexpected number of endpoints: %d", len(endpoints))
}
Expand All @@ -234,7 +227,7 @@ func TestCNAMEWithTXTServiceTranslation(t *testing.T) {

func TestCoreDNSApplyChanges(t *testing.T) {
client := fakeETCDClient{
map[string]*Service{},
map[string]Service{},
}
coredns := coreDNSProvider{
client: client,
Expand All @@ -248,11 +241,12 @@ func TestCoreDNSApplyChanges(t *testing.T) {
endpoint.NewEndpoint("domain2.local", endpoint.RecordTypeCNAME, "site.local"),
},
}
coredns.ApplyChanges(context.Background(), changes1)
err := coredns.ApplyChanges(context.Background(), changes1)
require.NoError(t, err)

expectedServices1 := map[string]*Service{
"/skydns/local/domain1": {Host: "5.5.5.5", Text: "string1"},
"/skydns/local/domain2": {Host: "site.local"},
expectedServices1 := map[string][]*Service{
"/skydns/local/domain1": {{Host: "5.5.5.5", Text: "string1"}},
"/skydns/local/domain2": {{Host: "site.local"}},
}
validateServices(client.services, expectedServices1, t, 1)

Expand All @@ -270,12 +264,13 @@ func TestCoreDNSApplyChanges(t *testing.T) {
changes2.UpdateOld = append(changes2.UpdateOld, ep)
}
}
applyServiceChanges(coredns, changes2)
err = applyServiceChanges(coredns, changes2)
require.NoError(t, err)

expectedServices2 := map[string]*Service{
"/skydns/local/domain1": {Host: "6.6.6.6", Text: "string1"},
"/skydns/local/domain2": {Host: "site.local"},
"/skydns/local/domain3": {Host: "7.7.7.7"},
expectedServices2 := map[string][]*Service{
"/skydns/local/domain1": {{Host: "6.6.6.6", Text: "string1"}},
"/skydns/local/domain2": {{Host: "site.local"}},
"/skydns/local/domain3": {{Host: "7.7.7.7"}},
}
validateServices(client.services, expectedServices2, t, 2)

Expand All @@ -287,10 +282,11 @@ func TestCoreDNSApplyChanges(t *testing.T) {
},
}

applyServiceChanges(coredns, changes3)
err = applyServiceChanges(coredns, changes3)
require.NoError(t, err)

expectedServices3 := map[string]*Service{
"/skydns/local/domain2": {Host: "site.local"},
expectedServices3 := map[string][]*Service{
"/skydns/local/domain2": {{Host: "site.local"}},
}
validateServices(client.services, expectedServices3, t, 3)

Expand All @@ -302,18 +298,17 @@ func TestCoreDNSApplyChanges(t *testing.T) {
endpoint.NewEndpoint("domain1.local", endpoint.RecordTypeA, "7.7.7.7"),
},
}
coredns.ApplyChanges(context.Background(), changes4)
err = coredns.ApplyChanges(context.Background(), changes4)
require.NoError(t, err)

expectedServices4 := map[string]*Service{
"/skydns/local/domain2": {Host: "site.local"},
"/skydns/local/domain1/1": {Host: "5.5.5.5"},
"/skydns/local/domain1/2": {Host: "6.6.6.6"},
"/skydns/local/domain1": {Host: "7.7.7.7"},
expectedServices4 := map[string][]*Service{
"/skydns/local/domain2": {{Host: "site.local"}},
"/skydns/local/domain1": {{Host: "5.5.5.5"}, {Host: "6.6.6.6"}, {Host: "7.7.7.7"}},
}
validateServices(client.services, expectedServices4, t, 1)
validateServices(client.services, expectedServices4, t, 4)
}

func applyServiceChanges(provider coreDNSProvider, changes *plan.Changes) {
func applyServiceChanges(provider coreDNSProvider, changes *plan.Changes) error {
ctx := context.Background()
records, _ := provider.Records(ctx)
for _, col := range [][]*endpoint.Endpoint{changes.Create, changes.UpdateNew, changes.Delete} {
Expand All @@ -325,29 +320,38 @@ func applyServiceChanges(provider coreDNSProvider, changes *plan.Changes) {
}
}
}
provider.ApplyChanges(ctx, changes)
return provider.ApplyChanges(ctx, changes)
}

func validateServices(services, expectedServices map[string]*Service, t *testing.T, step int) {
func validateServices(services map[string]Service, expectedServices map[string][]*Service, t *testing.T, step int) {
t.Helper()
if len(services) != len(expectedServices) {
t.Errorf("wrong number of records on step %d: %d != %d", step, len(services), len(expectedServices))
}
for key, value := range services {
keyParts := strings.Split(key, "/")
expectedKey := strings.Join(keyParts[:len(keyParts)-value.TargetStrip], "/")
expectedService := expectedServices[expectedKey]
if expectedService == nil {
expectedServiceEntries := expectedServices[expectedKey]
if expectedServiceEntries == nil {
t.Errorf("unexpected service %s", key)
continue
}
delete(expectedServices, key)
if value.Host != expectedService.Host {
t.Errorf("wrong host for service %s: %s != %s on step %d", key, value.Host, expectedService.Host, step)
found := false
for i, expectedServiceEntry := range expectedServiceEntries {
if value.Host == expectedServiceEntry.Host && value.Text == expectedServiceEntry.Text {
expectedServiceEntries = append(expectedServiceEntries[:i], expectedServiceEntries[i+1:]...)
found = true
break
}
}
if value.Text != expectedService.Text {
t.Errorf("wrong text for service %s: %s != %s on step %d", key, value.Text, expectedService.Text, step)
if !found {
t.Errorf("unexpected service %s: %s on step %d", key, value.Host, step)
}
if len(expectedServiceEntries) == 0 {
delete(expectedServices, expectedKey)
} else {
expectedServices[expectedKey] = expectedServiceEntries
}
}
if len(expectedServices) != 0 {
t.Errorf("unmatched expected services: %+v on step %d", expectedServices, step)
}
}

Expand Down
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