// controller will never change LabelServiceName, users might. This check
	// ensures that we handle changes to this label.
	svcName := endpointSlice.Labels[discovery.LabelServiceName]
	prevSvcName := prevEndpointSlice.Labels[discovery.LabelServiceName]
	if svcName != prevSvcName {

			}},
		},
		endpointSlices: []*discovery.EndpointSlice{{
			ObjectMeta: metav1.ObjectMeta{
				Name: endpointsName + "-1",
				Labels: map[string]string{
					discovery.LabelServiceName: endpointsName,
					discovery.LabelManagedBy:   controllerName,
				},
			},
		}},
		expectedNumActions: 1,
		expectedNumSlices:  0,
	}, {

	// controller will never change LabelServiceName, users might. This check
	// ensures that we handle changes to this label.
	svcName := endpointSlice.Labels[discovery.LabelServiceName]
	prevSvcName := prevEndpointSlice.Labels[discovery.LabelServiceName]
	if svcName != prevSvcName {

					t.Fatalf("expected Service Type %s, got %s", test.svcType, svcs[i].Spec.Type)
				}
				if eps[i].ObjectMeta.Labels[discovery.LabelServiceName] != svcs[i].Name {
					t.Fatalf("endpoint slice reference %s instead of Service %s", eps[i].ObjectMeta.Labels[discovery.LabelServiceName], svcs[i].Name)
				}
				if len(eps[i].Endpoints) != test.epPerService {

	var err error
	serviceName, ok := endpointSlice.Labels[discovery.LabelServiceName]
	if !ok || serviceName == "" {
		err = fmt.Errorf("no %s label set on endpoint slice: %s", discovery.LabelServiceName, endpointSlice.Name)
	} else if endpointSlice.Namespace == "" || endpointSlice.Name == "" {

type endpointSliceController struct {
	endpointCache *endpointSliceCache
	slices        kclient.Client[*v1.EndpointSlice]
	c             *Controller
}

var (
	endpointSliceRequirement = labelRequirement(mcs.LabelServiceName, selection.DoesNotExist, nil)
	endpointSliceSelector    = klabels.NewSelector().Add(*endpointSliceRequirement)
)

func newEndpointSliceController(c *Controller) *endpointSliceController {

		}

		serviceNameVal, ok := epSlice.Labels[discovery.LabelServiceName]
		if !ok {
			t.Errorf("Expected EndpointSlice to have %s label set", discovery.LabelServiceName)
		}
		if serviceNameVal != endpoints.Name {
			t.Errorf("Expected EndpointSlice to have %s label set to %s, got %s", discovery.LabelServiceName, endpoints.Name, serviceNameVal)
		}

	endpoint2 := discovery.Endpoint{Addresses: []string{"10.0.1.1"}}

	objMeta := metav1.ObjectMeta{
		Name:      "foo",
		Namespace: "bar",
		Labels:    map[string]string{discovery.LabelServiceName: "svc1"},
	}

	testCases := map[string]struct {
		cache         *EndpointSliceCache
		initialSlice  *discovery.EndpointSlice
		updatedSlice  *discovery.EndpointSlice
		expectChanged bool
	}{

	endpointSlice := &discovery.EndpointSlice{
		ObjectMeta: metav1.ObjectMeta{
			Name:      fmt.Sprintf("%s-1", svcPortName.Name),
			Namespace: svcPortName.Namespace,
			Labels:    map[string]string{discovery.LabelServiceName: svcPortName.Name},
		},
		Ports: []discovery.EndpointPort{{
			Name:     &svcPortName.Port,
			Port:     ptr.To[int32](80),
			Protocol: ptr.To(v1.ProtocolTCP),
		}},

	epSlice := &discovery.EndpointSlice{
		ObjectMeta:  metav1.ObjectMeta{Name: name, Namespace: namespace},
		AddressType: discovery.AddressTypeIPv4,
	}
	epSlice.Labels = map[string]string{discovery.LabelServiceName: name}
	subset := corev1.EndpointSubset{}

	for i, port := range ports {
		endpointPort := corev1.EndpointPort{
			Name:     fmt.Sprintf("port-%d", i),
			Port:     int32(port),