// and populates it with a few test RuntimeClass objects.
func NewPopulatedClient() clientset.Interface {
	return fake.NewSimpleClientset(
		NewRuntimeClass(EmptyRuntimeClass, ""),
		NewRuntimeClass(SandboxRuntimeClass, SandboxRuntimeHandler),
	)
}

// StartManagerSync starts the manager, and waits for the informer cache to sync.

// PrepareForUpdate clears fields that are not allowed to be set by end users on update.
func (strategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
	newRuntimeClass := obj.(*node.RuntimeClass)
	oldRuntimeClass := old.(*node.RuntimeClass)

	_, _ = newRuntimeClass, oldRuntimeClass
}

// Validate validates a new RuntimeClass. Validation must check for a correct signature.

	if err != nil {
		return err
	}
	if err := validateOverhead(attributes, pod, runtimeClass); err != nil {
		return err
	}

	return nil
}

// NewRuntimeClass creates a new RuntimeClass admission control handler
func NewRuntimeClass() *RuntimeClass {
	return &RuntimeClass{
		Handler: admission.NewHandler(admission.Create),
	}
}

}

func newRuntimeClassForTest(
	addLister bool,
	listerObject *nodev1.RuntimeClass,
	addClient bool,
	clientObject *nodev1.RuntimeClass) *RuntimeClass {
	runtimeClass := NewRuntimeClass()

	if addLister {
		informerFactory := informers.NewSharedInformerFactory(nil, controller.NoResyncPeriodFunc())
		runtimeClass.SetExternalKubeInformerFactory(informerFactory)
		if listerObject != nil {