podMap[controllerRef.UID] = append(podMap[controllerRef.UID], pod)
		}
	}
	return podMap, nil
}

// syncDeployment will sync the deployment with the given key.
// This function is not meant to be invoked concurrently with the same key.
func (dc *DeploymentController) syncDeployment(ctx context.Context, key string) error {
	logger := klog.FromContext(ctx)
	namespace, name, err := cache.SplitMetaNamespaceKey(key)

	if err != nil {
		f.t.Fatalf("error creating Deployment controller: %v", err)
	}
	if startInformers {
		stopCh := make(chan struct{})
		defer close(stopCh)
		informers.Start(stopCh)
	}

	err = c.syncDeployment(ctx, deploymentName)
	if !expectError && err != nil {
		f.t.Errorf("error syncing deployment: %v", err)
	} else if expectError && err == nil {
		f.t.Error("expected error syncing deployment, got nil")
	}