testcases := map[string]struct {
		Labels      map[string]string
		Addresses   []v1.NodeAddress
		Preferences []v1.NodeAddressType

		ExpectErr     string
		ExpectAddress string
	}{
		"no addresses": {
			ExpectErr: "no preferred addresses found; known addresses: []",
		},
		"missing address": {
			Addresses: []v1.NodeAddress{
				{Type: v1.NodeInternalIP, Address: "1.2.3.4"},
			},

class InetAddressesTest extends Specification{
    def addresses = new InetAddresses()

    def "always contains at least one loopback address"() {
        expect:
        !addresses.loopback.empty
    }

    @Requires(UnitTestPreconditions.Online)
    def "always contains at least one remote address"() {
        expect:
        !addresses.remote.empty
    }

    def "No remote addresses are loopback addresses"() {
        expect:

import spock.lang.Specification

class InetAddressFactoryTest extends Specification {

    def factory = new InetAddressFactory()
    InetAddresses addresses = Mock()

    def setup() {
        factory.inetAddresses = addresses
    }

    def "Loopback addresses are preferred"() {
        when:
        def loopback = [ip(127, 0, 0, 1)]
        loopbackAddresses(loopback)
        remoteAddresses([ip(192, 168, 17, 256)])

Xiaopeng Han <******@****.***> 1654695840 +0800

	for i := 0; i < n; i++ {
		endpoints = append(endpoints, discovery.Endpoint{
			Addresses: []string{fmt.Sprintf("10.1.2.%d", i%255)},
		})
	}
	return endpoints
}

func generateIPAddresses(n int) []string {
	addresses := []string{}
	for i := 0; i < n; i++ {
		addresses = append(addresses, fmt.Sprintf("10.1.2.%d", i%255))
	}
	return addresses
}

func generateTopology(n int) map[string]string {

                final String toStrs = fessConfig.getNotificationTo();
                final String[] toAddresses;
                if (StringUtil.isNotBlank(toStrs)) {
                    toAddresses = toStrs.split(",");
                } else {
                    toAddresses = StringUtil.EMPTY_STRINGS;
                }
                final Postbox postbox = ComponentUtil.getComponent(Postbox.class);

        private Map<Address, DaemonInfo> readInfosMap(Decoder decoder, List<Address> addresses) throws Exception {
            Map<Address, DaemonInfo> infosMap = new LinkedHashMap<Address, DaemonInfo>(addresses.size());
            DaemonInfo.Serializer daemonInfoSerializer = new DaemonInfo.Serializer(addresses);
            for (Address address : addresses) {
                infosMap.put(address, daemonInfoSerializer.read(decoder));
            }

	nodeAddresses, err := manager.NodeAddresses()
	if err != nil {
		t.Errorf("Unexpected err: %q\n", err)
	}
	if !reflect.DeepEqual(nodeAddresses, cloud.Addresses) {
		t.Errorf("Unexpected diff of node addresses: %v", cmp.Diff(nodeAddresses, cloud.Addresses))
	}

	// Change the IP address
	cloud.SetNodeAddresses(createNodeInternalIPAddress("10.0.1.13"))

	// Wait until the IP address changes
	maxRetry := 5

/**
 * Implementation of HappyEyeballs Sorting Addresses.
 *
 * The current implementation does not address any of:
 *  - Async DNS split by IP class
 *  - Stateful handling of connectivity results
 *  - The prioritisation of addresses
 *
 * https://datatracker.ietf.org/doc/html/rfc8305#section-4
 */
fun reorderForHappyEyeballs(addresses: List<InetAddress>): List<InetAddress> {
  if (addresses.size < 2) {
    return addresses
  }

	DeleteDummyDevice(devName string) error
	// ListBindAddress will list all IP addresses which are bound in a given interface
	ListBindAddress(devName string) ([]string, error)
	// GetAllLocalAddresses return all local addresses on the node.
	// Only the addresses of the current family are returned.
	// IPv6 link-local and loopback addresses are excluded.
	GetAllLocalAddresses() (sets.Set[string], error)