go sharedInformers.Start(stopCh)
	go config.Run(stopCh)

	endpoints1 := &discoveryv1.EndpointSlice{
		ObjectMeta:  metav1.ObjectMeta{Namespace: "testnamespace", Name: "foo"},
		AddressType: discoveryv1.AddressTypeIPv4,
		Endpoints: []discoveryv1.Endpoint{{
			Addresses: []string{"1.1.1.1"},
		}, {
			Addresses: []string{"2.2.2.2"},
		}},

	tests := []struct {
		name        string
		addressType discovery.AddressType
		wantWarning bool
	}{
		{
			name:        "AddressType = FQDN",
			addressType: discovery.AddressTypeFQDN,
			wantWarning: true,
		},
		{
			name:        "AddressType = IPV4",
			addressType: discovery.AddressTypeIPv4,
			wantWarning: false,
		},
		{
			name:        "AddressType = IPV6",

		expect := buildExpect(t)
		s := xds.NewFakeDiscoveryServer(t, xds.FakeOptions{
			KubernetesObjects: []runtime.Object{mkPod("pod", "sa", "127.0.0.1", "not-node")},
		})
		ads := s.ConnectDeltaADS().WithType(v3.AddressType).WithMetadata(model.NodeMetadata{NodeName: "node"})
		ads.Request(&discovery.DeltaDiscoveryRequest{
			ResourceNamesSubscribe:   []string{"*"},
			ResourceNamesUnsubscribe: []string{"*"},
		})
		ads.ExpectEmptyResponse()

	_, epSlice4IP := generateEndpointsAndSlice("foo", "testing", []int{80}, []string{"10.1.2.7", "10.1.2.8"})
	// "IP" is a deprecated address type, ensuring that it is handled properly.
	epSlice4IP.AddressType = discovery.AddressType("IP")
	_, epSlice4IPv4 := generateEndpointsAndSlice("foo", "testing", []int{80}, []string{"10.1.2.7", "10.1.2.8"})

	testCases := map[string]struct {
		expectedError  error

				switch epSlice.AddressType {
				case discovery.AddressTypeIPv4:
					matchingEndpointsV4 = append(matchingEndpointsV4, epSlice.Endpoints...)
				case discovery.AddressTypeIPv6:
					matchingEndpointsV6 = append(matchingEndpointsV6, epSlice.Endpoints...)
				default:
					t.Fatalf("Unexpected EndpointSlice address type found: %v", epSlice.AddressType)
				}
			}
		}

	disableRouteGeneration bool

	// disableNameSuffix, if set, will avoid appending -<class> to names
	disableNameSuffix bool

	// addressType is the default address type to report
	addressType gateway.AddressType
}

var classInfos = getClassInfos()

var builtinClasses = getBuiltinClasses()

func getBuiltinClasses() map[gateway.ObjectName]gateway.GatewayController {

    int numBytes = isIpv6 ? 16 : 4;

    byte[] addressBytes = address.toByteArray();
    byte[] targetCopyArray = new byte[numBytes];

    int srcPos = Math.max(0, addressBytes.length - numBytes);
    int copyLength = addressBytes.length - srcPos;
    int destPos = numBytes - copyLength;

    // Check the extra bytes in the BigInteger are all zero.

    int numBytes = isIpv6 ? 16 : 4;

    byte[] addressBytes = address.toByteArray();
    byte[] targetCopyArray = new byte[numBytes];

    int srcPos = Math.max(0, addressBytes.length - numBytes);
    int copyLength = addressBytes.length - srcPos;
    int destPos = numBytes - copyLength;

    // Check the extra bytes in the BigInteger are all zero.

				Addresses: []k8s.GatewayAddress{
					{
						Value: "abc",
					},
					{
						Type: func() *k8s.AddressType {
							t := k8s.HostnameAddressType
							return &t
						}(),
						Value: "example.com",
					},
					{
						Type: func() *k8s.AddressType {
							t := k8s.IPAddressType
							return &t
						}(),
						Value: "1.2.3.4",
					},
				},
			},

				{Type: v1.NodeHostName, Address: hostname},
			}
		}
		return nil
	}
}

func hasAddressType(addresses []v1.NodeAddress, addressType v1.NodeAddressType) bool {
	for _, address := range addresses {
		if address.Type == addressType {
			return true
		}
	}
	return false
}
func hasAddressValue(addresses []v1.NodeAddress, addressValue string) bool {
	for _, address := range addresses {