namespaces, err := namespace.GetAll(t)
	if err != nil {
		return fmt.Errorf("failed retrieving list of namespaces: %v", err)
	}

	// Restrict egress from this namespace to only those endpoints in the same Echos.
	cfg := t.ConfigIstio().New()
	cfg.Eval(ns.Name(), map[string]any{
		"Namespaces": namespaces,
	}, `
apiVersion: networking.istio.io/v1alpha3
kind: Sidecar
metadata:
  name: restrict-to-namespace
spec:

{
  "kind": "Namespace",
  "apiVersion": "v1",
  "metadata": {
    "name": "nameValue",
    "generateName": "generateNameValue",
    "namespace": "namespaceValue",
    "selfLink": "selfLinkValue",
    "uid": "uidValue",
    "resourceVersion": "resourceVersionValue",
    "generation": 7,
    "creationTimestamp": "2008-01-01T01:01:01Z",
    "deletionTimestamp": "2009-01-01T01:01:01Z",
    "deletionGracePeriodSeconds": 10,
    "labels": {

apiVersion: v1
kind: Namespace
metadata:
  annotations:
    annotationsKey: annotationsValue
  creationTimestamp: "2008-01-01T01:01:01Z"
  deletionGracePeriodSeconds: 10
  deletionTimestamp: "2009-01-01T01:01:01Z"
  finalizers:
  - finalizersValue
  generateName: generateNameValue
  generation: 7
  labels:
    labelsKey: labelsValue
  managedFields:
  - apiVersion: apiVersionValue
    fieldsType: fieldsTypeValue
    fieldsV1: {}

SataQiu <******@****.***> 1713430345 +0800

`
		})).
		// Create namespaces first. This way, echo can correctly configure egress to all namespaces.
		SetupParallel(
			namespace.Setup(&echo1NS, namespace.Config{Prefix: "echo1", Inject: true}),
			namespace.Setup(&echo2NS, namespace.Config{Prefix: "echo2", Inject: true}),
			namespace.Setup(&externalNS, namespace.Config{Prefix: "external", Inject: false}),

				return fmt.Errorf("failed to create Kubernetes client: %v", err)
			}
			ns := ctx.NamespaceOrDefault(ctx.Namespace())
			// If a user decides to enroll their namespace with a waypoint, verify that they have labeled their namespace as ambient.
			// If they don't, the user will be warned and be presented with the command to label their namespace as ambient if they
			// choose to do so.
			//

	},
	{
		Attributes: model.ServiceAttributes{
			Namespace: "group-namespace1",
		},
		Ports:    ports,
		Hostname: "httpbin.group-namespace1.svc.domain.suffix",
	},
	{
		Attributes: model.ServiceAttributes{
			Namespace: "group-namespace2",
		},
		Ports:    ports,
		Hostname: "httpbin.group-namespace2.svc.domain.suffix",
	},
	{
		Attributes: model.ServiceAttributes{

	// Namespace1 is used as the default namespace for reachability tests and other tests which can reuse the same config for echo instances
	Namespace1 namespace.Instance
	// Namespace2 is used by most authorization test cases within authorization_test.go
	Namespace2 namespace.Instance
	// Namespace3 is used by TestAuthorization_Conditions and there is one C echo instance deployed

			AddFunc: func(obj interface{}) {
				namespace := obj.(*v1.Namespace)
				namespaceController.enqueueNamespace(namespace)
			},
			UpdateFunc: func(oldObj, newObj interface{}) {
				namespace := newObj.(*v1.Namespace)
				namespaceController.enqueueNamespace(namespace)
			},
		},
		resyncPeriod,
	)
	namespaceController.lister = namespaceInformer.Lister()
	namespaceController.listerSynced = namespaceInformer.Informer().HasSynced

	case *apiistioioapinetworkingv1alpha3.DestinationRule:
		return c.Istio().NetworkingV1alpha3().DestinationRules(namespace).(ktypes.WriteAPI[T])
	case *k8sioapidiscoveryv1.EndpointSlice:
		return c.Kube().DiscoveryV1().EndpointSlices(namespace).(ktypes.WriteAPI[T])
	case *k8sioapicorev1.Endpoints:
		return c.Kube().CoreV1().Endpoints(namespace).(ktypes.WriteAPI[T])
	case *apiistioioapinetworkingv1alpha3.EnvoyFilter: