}{
		{
			testName:      "no existing endpoints",
			serviceName:   "foo",
			ip:            "1.2.3.4",
			endpointPorts: []corev1.EndpointPort{{Name: "foo", Port: 8080, Protocol: "TCP"}},
			initialState:  nil,
			expectCreate:  makeEndpointsArray("foo", []string{"1.2.3.4"}, []corev1.EndpointPort{{Name: "foo", Port: 8080, Protocol: "TCP"}}),
		},
		{
			testName:      "existing endpoints satisfy",
			serviceName:   "foo",

	dropHints := !utilfeature.DefaultFeatureGate.Enabled(features.TopologyAwareHints)
	if dropHints {
		for _, ep := range oldEPS.Endpoints {
			if ep.Hints != nil {
				dropHints = false
				break
			}
		}
	}

	if dropHints {
		for i := range newEPS.Endpoints {
			if dropHints {
				newEPS.Endpoints[i].Hints = nil
			}
		}
	}
}

var errEtcdUnreachable = errors.New("etcd is unreachable, please check your endpoints")

func etcdErrToErr(err error, etcdEndpoints []string) error {
	if err == nil {
		return nil
	}
	switch err {
	case context.DeadlineExceeded:
		return fmt.Errorf("%w %s", errEtcdUnreachable, etcdEndpoints)
	default:
		return fmt.Errorf("unexpected error %w from etcd, please check your endpoints %s", err, etcdEndpoints)
	}
}

)

var printEndpointError = func() func(Endpoint, error, bool) {
	var mutex sync.Mutex
	printOnce := make(map[Endpoint]map[string]int)

	return func(endpoint Endpoint, err error, once bool) {
		reqInfo := (&logger.ReqInfo{}).AppendTags("endpoint", endpoint.String())
		ctx := logger.SetReqInfo(GlobalContext, reqInfo)
		mutex.Lock()
		defer mutex.Unlock()

		m, ok := printOnce[endpoint]
		if !ok {
			m = make(map[string]int)

		t.Run(testCase.s, func(t *testing.T) {
			endpoints, secure, err := parseEndpoints(testCase.s)
			if err != nil && testCase.success {
				t.Errorf("expected to succeed but failed with %s", err)
			}
			if !testCase.success && err == nil {
				t.Error("expected failure but succeeded instead")
			}
			if testCase.success {
				if !reflect.DeepEqual(endpoints, testCase.endpoints) {

				if len(cluster.LoadAssignment.Endpoints) != len(tt.expected) {
					t.Fatalf("expected endpoints %d but got %d", len(cluster.LoadAssignment.Endpoints), len(tt.expected))
				}
				for i := range cluster.LoadAssignment.Endpoints {
					// TODO Below assertions are not robust to ordering changes in cluster.LoadAssignment.Endpoints[i]

		{SlashSeparator, Endpoint{}, -1, fmt.Errorf("empty or root endpoint is not supported")},
		{`\`, Endpoint{}, -1, fmt.Errorf("empty or root endpoint is not supported")},
		{"c://foo", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format")},
		{"ftp://foo", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format")},
		{"http://server/path?location", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format")},

type EndpointsLock struct {
	// EndpointsMeta should contain a Name and a Namespace of an
	// Endpoints object that the LeaderElector will attempt to lead.
	EndpointsMeta metav1.ObjectMeta
	Client        corev1client.EndpointsGetter
	LockConfig    ResourceLockConfig
	e             *v1.Endpoints
}

// Get returns the election record from a Endpoints Annotation
func (el *EndpointsLock) Get(ctx context.Context) (*LeaderElectionRecord, []byte, error) {

	//
	// The "endpoints change trigger" here means any Pod or Service change that resulted in the
	// Endpoints object change.
	//
	// Given the definition of the "endpoints change trigger", please note that this annotation will
	// be set ONLY for endpoints object changes triggered by either Pod or Service change. If the
	// Endpoints object changes due to other reasons, this annotation won't be set (or updated if it's

  // * FQDN: Represents a Fully Qualified Domain Name.
  optional string addressType = 4;

  // endpoints is a list of unique endpoints in this slice. Each slice may
  // include a maximum of 1000 endpoints.
  // +listType=atomic
  repeated Endpoint endpoints = 2;

  // ports specifies the list of network ports exposed by each endpoint in
  // this slice. Each port must have a unique name. When ports is empty, it