fix(appset): events not honouring configured namespaces (#21219) (#21241) (#21519)

* fix: 21219 Honour ARGOCD_APPLICATIONSET_CONTROLLER_NAMESPACES for all ApplicationSet events

Namespace filtering is applied to Update, Delete and Generic events.

Fixes #21219



* fix: 21219 Add tests for ignoreNotAllowedNamespaces



* fix: 21219 Remove redundant package import



---------

Signed-off-by: eadred <eadred77@googlemail.com>

Author: eadred

applicationset/controllers/applicationset_controller.go

@@ -525,11 +525,9 @@ func (r *ApplicationSetReconciler) getMinRequeueAfter(applicationSetInfo *argov1
 }
 
 func ignoreNotAllowedNamespaces(namespaces []string) predicate.Predicate {
-	return predicate.Funcs{
-		CreateFunc: func(e event.CreateEvent) bool {
-			return utils.IsNamespaceAllowed(namespaces, e.Object.GetNamespace())
-		},
-	}
+	return predicate.NewPredicateFuncs(func(object client.Object) bool {
+		return utils.IsNamespaceAllowed(namespaces, object.GetNamespace())
+	})
 }
 
 func appControllerIndexer(rawObj client.Object) []string {

applicationset/controllers/applicationset_controller_test.go

@@ -6657,3 +6657,86 @@ func TestMigrateStatus(t *testing.T) {
 		})
 	}
 }
+
+func TestIgnoreNotAllowedNamespaces(t *testing.T) {
+	tests := []struct {
+		name       string
+		namespaces []string
+		objectNS   string
+		expected   bool
+	}{
+		{
+			name:       "Namespace allowed",
+			namespaces: []string{"allowed-namespace"},
+			objectNS:   "allowed-namespace",
+			expected:   true,
+		},
+		{
+			name:       "Namespace not allowed",
+			namespaces: []string{"allowed-namespace"},
+			objectNS:   "not-allowed-namespace",
+			expected:   false,
+		},
+		{
+			name:       "Empty allowed namespaces",
+			namespaces: []string{},
+			objectNS:   "any-namespace",
+			expected:   false,
+		},
+		{
+			name:       "Multiple allowed namespaces",
+			namespaces: []string{"allowed-namespace-1", "allowed-namespace-2"},
+			objectNS:   "allowed-namespace-2",
+			expected:   true,
+		},
+		{
+			name:       "Namespace not in multiple allowed namespaces",
+			namespaces: []string{"allowed-namespace-1", "allowed-namespace-2"},
+			objectNS:   "not-allowed-namespace",
+			expected:   false,
+		},
+		{
+			name:       "Namespace matched by glob pattern",
+			namespaces: []string{"allowed-namespace-*"},
+			objectNS:   "allowed-namespace-1",
+			expected:   true,
+		},
+		{
+			name:       "Namespace matched by regex pattern",
+			namespaces: []string{"/^allowed-namespace-[^-]+$/"},
+			objectNS:   "allowed-namespace-1",
+			expected:   true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			predicate := ignoreNotAllowedNamespaces(tt.namespaces)
+			object := &v1alpha1.ApplicationSet{
+				ObjectMeta: metav1.ObjectMeta{
+					Namespace: tt.objectNS,
+				},
+			}
+
+			t.Run(tt.name+":Create", func(t *testing.T) {
+				result := predicate.Create(event.CreateEvent{Object: object})
+				assert.Equal(t, tt.expected, result)
+			})
+
+			t.Run(tt.name+":Update", func(t *testing.T) {
+				result := predicate.Update(event.UpdateEvent{ObjectNew: object})
+				assert.Equal(t, tt.expected, result)
+			})
+
+			t.Run(tt.name+":Delete", func(t *testing.T) {
+				result := predicate.Delete(event.DeleteEvent{Object: object})
+				assert.Equal(t, tt.expected, result)
+			})
+
+			t.Run(tt.name+":Generic", func(t *testing.T) {
+				result := predicate.Generic(event.GenericEvent{Object: object})
+				assert.Equal(t, tt.expected, result)
+			})
+		})
+	}
+}