layer1: add namespace tombstone helper step 34

pkg/utils/namespace_manager_model_test.go

@@ -5,6 +5,7 @@ import (
 	"time"
 
 	corev1 "k8s.io/api/core/v1"
+	k8sCache "k8s.io/client-go/tools/cache"
 )
 
 func TestNamespaceRecordClone(t *testing.T) {
@@ -107,3 +108,40 @@ func TestNamespaceEventFromNamespace(t *testing.T) {
 		t.Fatalf("expected event labels to stay detached from original namespace")
 	}
 }
+
+func TestNamespaceFromObject(t *testing.T) {
+	namespace := &corev1.Namespace{}
+	namespace.Name = "tenant-a"
+
+	extracted, ok := NamespaceFromObject(namespace)
+	if !ok || extracted.Name != "tenant-a" {
+		t.Fatalf("expected namespace object to be extracted directly")
+	}
+
+	extracted, ok = NamespaceFromObject(k8sCache.DeletedFinalStateUnknown{Obj: namespace})
+	if !ok || extracted.Name != "tenant-a" {
+		t.Fatalf("expected namespace tombstone to be extracted")
+	}
+}
+
+func TestNamespaceEventFromObject(t *testing.T) {
+	namespace := &corev1.Namespace{}
+	namespace.Name = "tenant-a"
+	namespace.Labels = map[string]string{ManagedNamespaceLabelKey: ManagedNamespaceLabelValue}
+
+	event := NamespaceEventFromObject(NamespaceEventRemove, k8sCache.DeletedFinalStateUnknown{Obj: namespace}, NamespaceSourceWatcher, time.Now().UTC())
+	if event.Type != NamespaceEventRemove {
+		t.Fatalf("expected remove event type")
+	}
+	if event.Name != "tenant-a" {
+		t.Fatalf("expected tenant-a event name")
+	}
+	if event.Labels[ManagedNamespaceLabelKey] != ManagedNamespaceLabelValue {
+		t.Fatalf("expected labels copied from tombstone namespace")
+	}
+
+	emptyEvent := NamespaceEventFromObject(NamespaceEventRemove, "not-a-namespace", NamespaceSourceWatcher, time.Now().UTC())
+	if emptyEvent.Name != "" {
+		t.Fatalf("expected empty name for unsupported object")
+	}
+}