ads := s.ConnectADS()

		ads.RequestResponseAck(t, &discovery.DiscoveryRequest{TypeUrl: v3.ClusterType})
		ads.RequestResponseAck(t, &discovery.DiscoveryRequest{TypeUrl: v3.ListenerType})
		ads.RequestResponseAck(t, &discovery.DiscoveryRequest{
			TypeUrl:       v3.EndpointType,
			ResourceNames: []string{"outbound|9080||app2.default.svc.cluster.local"},
		})
		ads.RequestResponseAck(t, &discovery.DiscoveryRequest{

	t.Helper()
	req = a.fillInRequestDefaults(req)
	if err := a.client.Send(req); err != nil {
		t.Fatal(err)
	}
}

// RequestResponseAck does a full XDS exchange: Send a request, get a response, and ACK the response
func (a *AdsTest) RequestResponseAck(t test.Failer, req *discovery.DiscoveryRequest) *discovery.DiscoveryResponse {
	t.Helper()
	req = a.fillInRequestDefaults(req)
	a.Request(t, req)

		},
	}

	s := xds.NewFakeDiscoveryServer(t, xds.FakeOptions{})
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			ads := s.ConnectADS().WithType(v3.RouteType).WithID(tt.node)
			ads.RequestResponseAck(t, &discovery.DiscoveryRequest{ResourceNames: tt.routes})
		})
	}
}

const (
	app3Ip    = "10.2.0.1"
	gatewayIP = "10.3.0.1"
)

// Common code for the xds testing.

	req = a.fillInRequestDefaults(req)
	if err := a.client.Send(req); err != nil {
		a.t.Fatal(err)
	}
}

// RequestResponseAck does a full XDS exchange: Send a request, get a response, and ACK the response
func (a *DeltaAdsTest) RequestResponseAck(req *discovery.DeltaDiscoveryRequest) *discovery.DeltaDiscoveryResponse {
	a.t.Helper()
	req = a.fillInRequestDefaults(req)
	a.Request(req)

			s := xds.NewFakeDiscoveryServer(t, xds.FakeOptions{
				ConfigString: mustReadFile(t, "./testdata/nds-se.yaml"),
			})

			ads := s.ConnectADS().WithType(v3.NameTableType)
			res := ads.RequestResponseAck(t, &discovery.DiscoveryRequest{
				Node: &core.Node{
					Id:       ads.ID,
					Metadata: tt.meta.ToStruct(),
				},
			})

			nt := &dnsProto.NameTable{}
			err := res.Resources[0].UnmarshalTo(nt)

	"istio.io/istio/pkg/test/util/assert"
	"istio.io/istio/pkg/util/sets"
)

func TestCDS(t *testing.T) {
	s := xds.NewFakeDiscoveryServer(t, xds.FakeOptions{})
	ads := s.ConnectADS().WithType(v3.ClusterType)
	ads.RequestResponseAck(t, nil)
}

func TestSAN(t *testing.T) {
	labels := map[string]string{"app": "test"}
	pod := &v1.Pod{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "pod",
			Namespace: "default",
			Labels:    labels,