updated unit test returns

cns/middlewares/k8sSwiftV2_windows.go

@@ -14,9 +14,9 @@ import (
 	"github.com/pkg/errors"
 )
 
-var defaultDenyEgressPolicy policy.Policy = getEndpointPolicy(cns.DirectionTypeOut)
+var defaultDenyEgressPolicy policy.Policy = mustGetEndpointPolicy(cns.DirectionTypeOut)
 
-var defaultDenyIngressPolicy policy.Policy = getEndpointPolicy(cns.DirectionTypeIn)
+var defaultDenyIngressPolicy policy.Policy = mustGetEndpointPolicy(cns.DirectionTypeIn)
 
 // for AKS L1VH, do not set default route on infraNIC to avoid customer pod reaching all infra vnet services
 // default route is set for secondary interface NIC(i.e,delegatedNIC)
@@ -70,20 +70,32 @@ func (k *K8sSWIFTv2Middleware) addDefaultRoute(podIPInfo *cns.PodIpInfo, gwIP st
 	podIPInfo.Routes = append(podIPInfo.Routes, route)
 }
 
+func mustGetEndpointPolicy(direction string) policy.Policy {
+	endpointPolicy, err := getEndpointPolicy(direction)
+	if err != nil {
+		panic(err)
+	}
+	return endpointPolicy
+}
+
 // get policy of type endpoint policy given the params
-func getEndpointPolicy(direction string) policy.Policy {
-	endpointPolicy := createEndpointPolicy(direction)
+func getEndpointPolicy(direction string) (policy.Policy, error) {
+	endpointPolicy, err := createEndpointPolicy(direction)
+
+	if err != nil {
+		return policy.Policy{}, fmt.Errorf("error creating endpoint policy:  %w", err)
+	}
 
 	additionalArgs := policy.Policy{
 		Type: policy.EndpointPolicy,
 		Data: endpointPolicy,
 	}
 
-	return additionalArgs
+	return additionalArgs, nil
 }
 
 // create policy given the params
-func createEndpointPolicy(direction string) []byte {
+func createEndpointPolicy(direction string) ([]byte, error) {
 	endpointPolicy := struct {
 		Type      string `json:"Type"`
 		Action    string `json:"Action"`
@@ -98,10 +110,10 @@ func createEndpointPolicy(direction string) []byte {
 
 	rawPolicy, err := json.Marshal(endpointPolicy)
 	if err != nil {
-		logger.Errorf("error marshalling policy to json, err is:  %v", err)
+		return nil, fmt.Errorf("error marshalling policy to json, err is:  %w", err)
 	}
 
-	return rawPolicy
+	return rawPolicy, nil
 }
 
 // IPConfigsRequestHandlerWrapper is the middleware function for handling SWIFT v2 IP configs requests for AKS-SWIFT. This function wrapped the default SWIFT request
@@ -136,7 +148,7 @@ func (k *K8sSWIFTv2Middleware) IPConfigsRequestHandlerWrapper(defaultHandler, fa
 		}
 
 		//  GetDefaultDenyBool takes in mtpnc and returns the value of defaultDenyACLBool from it
-		defaultDenyACLBool, err := GetDefaultDenyBool(mtpnc)
+		defaultDenyACLBool := GetDefaultDenyBool(mtpnc)
 
 		// ipConfigsResp has infra IP configs -> if defaultDenyACLbool is enabled, add the default deny endpoint policies as a property in PodIpInfo
 		for i := range ipConfigsResp.PodIPInfo {
@@ -193,7 +205,7 @@ func (k *K8sSWIFTv2Middleware) IPConfigsRequestHandlerWrapper(defaultHandler, fa
 	}
 }
 
-func GetDefaultDenyBool(mtpnc v1alpha1.MultitenantPodNetworkConfig) (bool, error) {
+func GetDefaultDenyBool(mtpnc v1alpha1.MultitenantPodNetworkConfig) bool {
 	// returns the value of DefaultDenyACL from mtpnc
-	return mtpnc.Status.DefaultDenyACL, nil
+	return mtpnc.Status.DefaultDenyACL
 }

cns/middlewares/k8sSwiftV2_windows_test.go

@@ -10,6 +10,7 @@ import (
 	"github.com/Azure/azure-container-networking/cns/middlewares/mock"
 	"github.com/Azure/azure-container-networking/crd/multitenancy/api/v1alpha1"
 	"github.com/Azure/azure-container-networking/network/policy"
+	"github.com/google/go-cmp/cmp"
 	"github.com/stretchr/testify/require"
 	"gotest.tools/v3/assert"
 )
@@ -150,16 +151,16 @@ func TestAddDefaultDenyACL(t *testing.T) {
 	var defaultDenyEgressPolicy, defaultDenyIngressPolicy policy.Policy
 	var err error
 
-	defaultDenyEgressPolicy = getEndpointPolicy("Out")
-	defaultDenyIngressPolicy = getEndpointPolicy("In")
+	defaultDenyEgressPolicy = mustGetEndpointPolicy("Out")
+	defaultDenyIngressPolicy = mustGetEndpointPolicy("In")
 
 	allEndpoints = append(allEndpoints, defaultDenyEgressPolicy, defaultDenyIngressPolicy)
 
 	// Normalize both slices so there is no extra spacing, new lines, etc
 	normalizedExpected := normalizeKVPairs(t, expectedDefaultDenyEndpoint)
 	normalizedActual := normalizeKVPairs(t, allEndpoints)
-	if !reflect.DeepEqual(normalizedExpected, normalizedActual) {
-		t.Errorf("got '%+v', expected '%+v'", normalizedActual, normalizedExpected)
+	if !cmp.Equal(normalizedExpected, normalizedActual) {
+		t.Error("received policy differs from expectation: diff", cmp.Diff(normalizedExpected, normalizedActual))
 	}
 	assert.Equal(t, err, nil)
 }