test: added test for pkg/utils/policy/marshal.go (kyverno#9583)

* test: added test for pkg/utils/policy/marshal.go

Signed-off-by: sivasathyaseeelan <dnsiva.sathyaseelan.chy21@iitbhu.ac.in>

* test: added test for pkg/utils/policy/marshal.go

Signed-off-by: sivasathyaseeelan <dnsiva.sathyaseelan.chy21@iitbhu.ac.in>

---------

Signed-off-by: sivasathyaseeelan <dnsiva.sathyaseelan.chy21@iitbhu.ac.in>

pkg/utils/policy/marshal_test.go

@@ -0,0 +1,96 @@
+package policy
+
+import (
+	"encoding/json"
+	"reflect"
+	"testing"
+
+	kyvernov1 "github.com/kyverno/kyverno/api/kyverno/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"sigs.k8s.io/yaml"
+)
+
+func TestToJson(t *testing.T) {
+	tests := []struct {
+		name   string
+		policy kyvernov1.PolicyInterface
+	}{
+		{
+			name: "Valid ClusterPolicy",
+			policy: &kyvernov1.ClusterPolicy{
+				ObjectMeta: metav1.ObjectMeta{Name: "test-policy"},
+				TypeMeta:   metav1.TypeMeta{Kind: "APIv1"},
+			},
+		},
+		{
+			name: "Valid Policy",
+			policy: &kyvernov1.Policy{
+				ObjectMeta: metav1.ObjectMeta{Name: "test-namespace-policy", Namespace: "test-namespace"},
+			},
+		},
+		{
+			name:   "Nil Policy",
+			policy: nil,
+		},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			result, err := ToJson(test.policy)
+			if err != nil {
+				t.Errorf("Unexpected error: %v", err)
+			}
+			expectedResult, err := json.Marshal(test.policy)
+			if err != nil {
+				t.Errorf("Unexpected error: %v", err)
+			}
+			if !reflect.DeepEqual(result, expectedResult) {
+				t.Errorf("Expected Json %s, got %s", expectedResult, result)
+			}
+		})
+	}
+}
+
+func TestToYaml(t *testing.T) {
+	tests := []struct {
+		name   string
+		policy kyvernov1.PolicyInterface
+	}{
+		{
+			name: "Valid ClusterPolicy",
+			policy: &kyvernov1.ClusterPolicy{
+				ObjectMeta: metav1.ObjectMeta{Name: "test-policy"},
+			},
+		},
+		{
+			name: "Valid Policy",
+			policy: &kyvernov1.Policy{
+				ObjectMeta: metav1.ObjectMeta{Name: "test-namespace-policy", Namespace: "test-namespace"},
+			},
+		},
+		{
+			name:   "Nil Policy",
+			policy: nil,
+		},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			result, err := ToYaml(test.policy)
+			if err != nil {
+				t.Errorf("Unexpected error: %v", err)
+			}
+			jsonBytes, err := ToJson(test.policy)
+			if err != nil {
+				if !reflect.DeepEqual(result, nil) {
+					t.Errorf("Expected Json %+v, got %s", nil, result)
+				}
+			}
+			expectedResult, err := yaml.JSONToYAML(jsonBytes)
+			if err != nil {
+				t.Errorf("Unexpected error: %v", err)
+			}
+			if !reflect.DeepEqual(result, expectedResult) {
+				t.Errorf("Expected Json %s, got %s", expectedResult, result)
+			}
+		})
+	}
+}