add label selector for created-by: nats-manager

internal/label/label.go

@@ -14,13 +14,19 @@ const (
 	KeyPartOf    = "app.kubernetes.io/part-of"
 	KeyDashboard = "kyma-project.io/dashboard"
 
-	// Kubernetes label keys used by nats-manager.
+	// Kubernetes label values used by nats-manager.
 	ValueNATS        = "nats"
 	ValueNATSManager = "nats-manager"
 )
 
-// SelectorInstanceNATS returns a labelselector for instance ("app.kubernetes.io/instance") as usesd
+// SelectorInstanceNATS returns a labelselector for instance ("app.kubernetes.io/instance") as used
 // by the nats-manager.
 func SelectorInstanceNATS() labels.Selector {
 	return labels.SelectorFromSet(map[string]string{KeyInstance: ValueNATSManager})
 }
+
+// SelectorCreatedByNATS returns a labelselector for created-by ("app.kubernetes.io/created-by") as used
+// by the nats-manager.
+func SelectorCreatedByNATS() labels.Selector {
+	return labels.SelectorFromSet(map[string]string{KeyCreatedBy: ValueNATSManager})
+}

internal/label/label_test.go

@@ -21,3 +21,16 @@ func TestSelectorInstanceNATS(t *testing.T) {
 		t.Errorf("Expected %v, but got %v", wantedSelector, actualSelector)
 	}
 }
+
+func TestSelectorCreatedByNATS(t *testing.T) {
+	// arrange
+	wantedSelector := labels.SelectorFromSet(map[string]string{"app.kubernetes.io/created-by": "nats-manager"})
+
+	// act
+	actualSelector := label.SelectorCreatedByNATS()
+
+	// assert
+	if !reflect.DeepEqual(wantedSelector, actualSelector) {
+		t.Errorf("Expected %v, but got %v", wantedSelector, actualSelector)
+	}
+}