// +build windows

/*
Copyright 2018 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package winkernel

import (
	"fmt"
	"net"
	"strings"
	"testing"
	"time"

	"github.com/Microsoft/hcsshim/hcn"
	v1 "k8s.io/api/core/v1"
	discovery "k8s.io/api/discovery/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/apimachinery/pkg/util/intstr"
	"k8s.io/kubernetes/pkg/proxy"
	"k8s.io/kubernetes/pkg/proxy/healthcheck"
	utilpointer "k8s.io/utils/pointer"
)

const (
	testHostName      = "test-hostname"
	macAddress        = "00-11-22-33-44-55"
	clusterCIDR       = "192.168.1.0/24"
	destinationPrefix = "192.168.2.0/24"
	providerAddress   = "10.0.0.3"
	guid              = "123ABC"
)

type fakeHNS struct{}

func newFakeHNS() *fakeHNS {
	return &fakeHNS{}
}

func (hns fakeHNS) getNetworkByName(name string) (*hnsNetworkInfo, error) {
	var remoteSubnets []*remoteSubnetInfo
	rs := &remoteSubnetInfo{
		destinationPrefix: destinationPrefix,
		isolationID:       4096,
		providerAddress:   providerAddress,
		drMacAddress:      macAddress,
	}
	remoteSubnets = append(remoteSubnets, rs)
	return &hnsNetworkInfo{
		id:            strings.ToUpper(guid),
		name:          name,
		networkType:   NETWORK_TYPE_OVERLAY,
		remoteSubnets: remoteSubnets,
	}, nil
}

func (hns fakeHNS) getEndpointByID(id string) (*endpointsInfo, error) {
	return nil, nil
}

func (hns fakeHNS) getEndpointByIpAddress(ip string, networkName string) (*endpointsInfo, error) {
	_, ipNet, _ := net.ParseCIDR(destinationPrefix)

	if ipNet.Contains(net.ParseIP(ip)) {
		return &endpointsInfo{
			ip:         ip,
			isLocal:    false,
			macAddress: macAddress,
			hnsID:      guid,
			hns:        hns,
		}, nil
	}
	return nil, nil

}

func (hns fakeHNS) createEndpoint(ep *endpointsInfo, networkName string) (*endpointsInfo, error) {
	return &endpointsInfo{
		ip:         ep.ip,
		isLocal:    ep.isLocal,
		macAddress: ep.macAddress,
		hnsID:      guid,
		hns:        hns,
	}, nil
}

func (hns fakeHNS) deleteEndpoint(hnsID string) error {
	return nil
}

func (hns fakeHNS) getLoadBalancer(endpoints []endpointsInfo, flags loadBalancerFlags, sourceVip string, vip string, protocol uint16, internalPort uint16, externalPort uint16) (*loadBalancerInfo, error) {
	return &loadBalancerInfo{
		hnsID: guid,
	}, nil
}

func (hns fakeHNS) deleteLoadBalancer(hnsID string) error {
	return nil
}

func NewFakeProxier(syncPeriod time.Duration, minSyncPeriod time.Duration, clusterCIDR string, hostname string, nodeIP net.IP, networkType string) *Proxier {
	sourceVip := "192.168.1.2"
	hnsNetworkInfo := &hnsNetworkInfo{
		id:          strings.ToUpper(guid),
		name:        "TestNetwork",
		networkType: networkType,
	}
	proxier := &Proxier{
		serviceMap:          make(proxy.ServiceMap),
		endpointsMap:        make(proxy.EndpointsMap),
		clusterCIDR:         clusterCIDR,
		hostname:            testHostName,
		nodeIP:              nodeIP,
		serviceHealthServer: healthcheck.NewFakeServiceHealthServer(),
		network:             *hnsNetworkInfo,
		sourceVip:           sourceVip,
		hostMac:             macAddress,
		isDSR:               false,
		hns:                 newFakeHNS(),
		endPointsRefCount:   make(endPointsReferenceCountMap),
	}

	serviceChanges := proxy.NewServiceChangeTracker(proxier.newServiceInfo, v1.IPv4Protocol, nil, proxier.serviceMapChange)
	endpointChangeTracker := proxy.NewEndpointChangeTracker(hostname, proxier.newEndpointInfo, v1.IPv4Protocol, nil, proxier.endpointsMapChange)
	proxier.endpointsChanges = endpointChangeTracker
	proxier.serviceChanges = serviceChanges

	return proxier
}

func TestCreateServiceVip(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, clusterCIDR, "testhost", net.ParseIP("10.0.0.1"), NETWORK_TYPE_OVERLAY)
	if proxier == nil {
		t.Error()
	}

	svcIP := "10.20.30.41"
	svcPort := 80
	svcNodePort := 3001
	svcExternalIPs := "50.60.70.81"
	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}
	timeoutSeconds := v1.DefaultClientIPServiceAffinitySeconds

	makeServiceMap(proxier,
		makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP
			svc.Spec.ExternalIPs = []string{svcExternalIPs}
			svc.Spec.SessionAffinity = v1.ServiceAffinityClientIP
			svc.Spec.SessionAffinityConfig = &v1.SessionAffinityConfig{
				ClientIP: &v1.ClientIPConfig{
					TimeoutSeconds: &timeoutSeconds,
				},
			}
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName.Port,
				Port:     int32(svcPort),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort),
			}}
		}),
	)
	proxier.setInitialized(true)
	proxier.syncProxyRules()

	svc := proxier.serviceMap[svcPortName]
	svcInfo, ok := svc.(*serviceInfo)
	if !ok {
		t.Errorf("Failed to cast serviceInfo %q", svcPortName.String())

	} else {
		if svcInfo.remoteEndpoint == nil {
			t.Error()
		}
		if svcInfo.remoteEndpoint.ip != svcIP {
			t.Error()
		}
	}
}

func TestCreateRemoteEndpointOverlay(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, clusterCIDR, "testhost", net.ParseIP("10.0.0.1"), NETWORK_TYPE_OVERLAY)
	if proxier == nil {
		t.Error()
	}

	svcIP := "10.20.30.41"
	svcPort := 80
	svcNodePort := 3001
	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}
	tcpProtocol := v1.ProtocolTCP

	makeServiceMap(proxier,
		makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName.Port,
				Port:     int32(svcPort),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort),
			}}
		}),
	)
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     utilpointer.StringPtr(svcPortName.Port),
				Port:     utilpointer.Int32(int32(svcPort)),
				Protocol: &tcpProtocol,
			}}
		}),
	)
	proxier.setInitialized(true)
	proxier.syncProxyRules()

	ep := proxier.endpointsMap[svcPortName][0]
	epInfo, ok := ep.(*endpointsInfo)
	if !ok {
		t.Errorf("Failed to cast endpointsInfo %q", svcPortName.String())

	} else {
		if epInfo.hnsID != guid {
			t.Errorf("%v does not match %v", epInfo.hnsID, guid)
		}
	}

	if *proxier.endPointsRefCount[guid] <= 0 {
		t.Errorf("RefCount not incremented. Current value: %v", *proxier.endPointsRefCount[guid])
	}

	if *proxier.endPointsRefCount[guid] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[guid], *epInfo.refCount)
	}
}

func TestCreateRemoteEndpointL2Bridge(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, clusterCIDR, "testhost", net.ParseIP("10.0.0.1"), "L2Bridge")
	if proxier == nil {
		t.Error()
	}

	tcpProtocol := v1.ProtocolTCP
	svcIP := "10.20.30.41"
	svcPort := 80
	svcNodePort := 3001
	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       tcpProtocol,
	}

	makeServiceMap(proxier,
		makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName.Port,
				Port:     int32(svcPort),
				Protocol: tcpProtocol,
				NodePort: int32(svcNodePort),
			}}
		}),
	)
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     utilpointer.String(svcPortName.Port),
				Port:     utilpointer.Int32(int32(svcPort)),
				Protocol: &tcpProtocol,
			}}
		}),
	)
	proxier.setInitialized(true)
	proxier.syncProxyRules()
	ep := proxier.endpointsMap[svcPortName][0]
	epInfo, ok := ep.(*endpointsInfo)
	if !ok {
		t.Errorf("Failed to cast endpointsInfo %q", svcPortName.String())

	} else {
		if epInfo.hnsID != guid {
			t.Errorf("%v does not match %v", epInfo.hnsID, guid)
		}
	}

	if *proxier.endPointsRefCount[guid] <= 0 {
		t.Errorf("RefCount not incremented. Current value: %v", *proxier.endPointsRefCount[guid])
	}

	if *proxier.endPointsRefCount[guid] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[guid], *epInfo.refCount)
	}
}
func TestSharedRemoteEndpointDelete(t *testing.T) {
	syncPeriod := 30 * time.Second
	tcpProtocol := v1.ProtocolTCP
	proxier := NewFakeProxier(syncPeriod, syncPeriod, clusterCIDR, "testhost", net.ParseIP("10.0.0.1"), "L2Bridge")
	if proxier == nil {
		t.Error()
	}

	svcIP1 := "10.20.30.41"
	svcPort1 := 80
	svcNodePort1 := 3001
	svcPortName1 := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	svcIP2 := "10.20.30.42"
	svcPort2 := 80
	svcNodePort2 := 3002
	svcPortName2 := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc2"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	makeServiceMap(proxier,
		makeTestService(svcPortName1.Namespace, svcPortName1.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP1
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName1.Port,
				Port:     int32(svcPort1),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort1),
			}}
		}),
		makeTestService(svcPortName2.Namespace, svcPortName2.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP2
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName2.Port,
				Port:     int32(svcPort2),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort2),
			}}
		}),
	)
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName1.Namespace, svcPortName1.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     utilpointer.StringPtr(svcPortName1.Port),
				Port:     utilpointer.Int32(int32(svcPort1)),
				Protocol: &tcpProtocol,
			}}
		}),
		makeTestEndpointSlice(svcPortName2.Namespace, svcPortName2.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     utilpointer.StringPtr(svcPortName2.Port),
				Port:     utilpointer.Int32(int32(svcPort2)),
				Protocol: &tcpProtocol,
			}}
		}),
	)
	proxier.setInitialized(true)
	proxier.syncProxyRules()
	ep := proxier.endpointsMap[svcPortName1][0]
	epInfo, ok := ep.(*endpointsInfo)
	if !ok {
		t.Errorf("Failed to cast endpointsInfo %q", svcPortName1.String())

	} else {
		if epInfo.hnsID != guid {
			t.Errorf("%v does not match %v", epInfo.hnsID, guid)
		}
	}

	if *proxier.endPointsRefCount[guid] != 2 {
		t.Errorf("RefCount not incremented. Current value: %v", *proxier.endPointsRefCount[guid])
	}

	if *proxier.endPointsRefCount[guid] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[guid], *epInfo.refCount)
	}

	proxier.setInitialized(false)
	deleteServices(proxier,
		makeTestService(svcPortName2.Namespace, svcPortName2.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP2
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName2.Port,
				Port:     int32(svcPort2),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort2),
			}}
		}),
	)

	deleteEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName2.Namespace, svcPortName2.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     utilpointer.StringPtr(svcPortName2.Port),
				Port:     utilpointer.Int32(int32(svcPort2)),
				Protocol: &tcpProtocol,
			}}
		}),
	)

	proxier.setInitialized(true)
	proxier.syncProxyRules()

	ep = proxier.endpointsMap[svcPortName1][0]
	epInfo, ok = ep.(*endpointsInfo)
	if !ok {
		t.Errorf("Failed to cast endpointsInfo %q", svcPortName1.String())

	} else {
		if epInfo.hnsID != guid {
			t.Errorf("%v does not match %v", epInfo.hnsID, guid)
		}
	}

	if *epInfo.refCount != 1 {
		t.Errorf("Incorrect Refcount. Current value: %v", *epInfo.refCount)
	}

	if *proxier.endPointsRefCount[guid] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[guid], *epInfo.refCount)
	}
}
func TestSharedRemoteEndpointUpdate(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, clusterCIDR, "testhost", net.ParseIP("10.0.0.1"), "L2Bridge")
	if proxier == nil {
		t.Error()
	}

	svcIP1 := "10.20.30.41"
	svcPort1 := 80
	svcNodePort1 := 3001
	svcPortName1 := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	svcIP2 := "10.20.30.42"
	svcPort2 := 80
	svcNodePort2 := 3002
	svcPortName2 := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc2"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	makeServiceMap(proxier,
		makeTestService(svcPortName1.Namespace, svcPortName1.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP1
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName1.Port,
				Port:     int32(svcPort1),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort1),
			}}
		}),
		makeTestService(svcPortName2.Namespace, svcPortName2.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP2
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName2.Port,
				Port:     int32(svcPort2),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort2),
			}}
		}),
	)

	tcpProtocol := v1.ProtocolTCP
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName1.Namespace, svcPortName1.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     utilpointer.StringPtr(svcPortName1.Port),
				Port:     utilpointer.Int32(int32(svcPort1)),
				Protocol: &tcpProtocol,
			}}
		}),
		makeTestEndpointSlice(svcPortName2.Namespace, svcPortName2.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     utilpointer.StringPtr(svcPortName2.Port),
				Port:     utilpointer.Int32(int32(svcPort2)),
				Protocol: &tcpProtocol,
			}}
		}),
	)
	proxier.setInitialized(true)
	proxier.syncProxyRules()
	ep := proxier.endpointsMap[svcPortName1][0]
	epInfo, ok := ep.(*endpointsInfo)
	if !ok {
		t.Errorf("Failed to cast endpointsInfo %q", svcPortName1.String())

	} else {
		if epInfo.hnsID != guid {
			t.Errorf("%v does not match %v", epInfo.hnsID, guid)
		}
	}

	if *proxier.endPointsRefCount[guid] != 2 {
		t.Errorf("RefCount not incremented. Current value: %v", *proxier.endPointsRefCount[guid])
	}

	if *proxier.endPointsRefCount[guid] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[guid], *epInfo.refCount)
	}

	proxier.setInitialized(false)

	proxier.OnServiceUpdate(
		makeTestService(svcPortName1.Namespace, svcPortName1.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP1
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName1.Port,
				Port:     int32(svcPort1),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort1),
			}}
		}),
		makeTestService(svcPortName1.Namespace, svcPortName1.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP1
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName1.Port,
				Port:     int32(svcPort1),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(3003),
			}}
		}))

	proxier.OnEndpointSliceUpdate(
		makeTestEndpointSlice(svcPortName1.Namespace, svcPortName1.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     utilpointer.StringPtr(svcPortName1.Port),
				Port:     utilpointer.Int32(int32(svcPort1)),
				Protocol: &tcpProtocol,
			}}
		}),
		makeTestEndpointSlice(svcPortName1.Namespace, svcPortName1.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     utilpointer.StringPtr(svcPortName1.Port),
				Port:     utilpointer.Int32(int32(svcPort1)),
				Protocol: &tcpProtocol,
			},
				{
					Name:     utilpointer.StringPtr("p443"),
					Port:     utilpointer.Int32(int32(443)),
					Protocol: &tcpProtocol,
				}}
		}))

	proxier.mu.Lock()
	proxier.endpointSlicesSynced = true
	proxier.mu.Unlock()

	proxier.setInitialized(true)
	proxier.syncProxyRules()

	ep = proxier.endpointsMap[svcPortName1][0]
	epInfo, ok = ep.(*endpointsInfo)

	if !ok {
		t.Errorf("Failed to cast endpointsInfo %q", svcPortName1.String())

	} else {
		if epInfo.hnsID != guid {
			t.Errorf("%v does not match %v", epInfo.hnsID, guid)
		}
	}

	if *epInfo.refCount != 2 {
		t.Errorf("Incorrect refcount. Current value: %v", *epInfo.refCount)
	}

	if *proxier.endPointsRefCount[guid] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[guid], *epInfo.refCount)
	}
}
func TestCreateLoadBalancer(t *testing.T) {
	syncPeriod := 30 * time.Second
	tcpProtocol := v1.ProtocolTCP
	proxier := NewFakeProxier(syncPeriod, syncPeriod, clusterCIDR, "testhost", net.ParseIP("10.0.0.1"), NETWORK_TYPE_OVERLAY)
	if proxier == nil {
		t.Error()
	}

	svcIP := "10.20.30.41"
	svcPort := 80
	svcNodePort := 3001
	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	makeServiceMap(proxier,
		makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName.Port,
				Port:     int32(svcPort),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort),
			}}
		}),
	)
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     utilpointer.StringPtr(svcPortName.Port),
				Port:     utilpointer.Int32(int32(svcPort)),
				Protocol: &tcpProtocol,
			}}
		}),
	)

	proxier.setInitialized(true)
	proxier.syncProxyRules()

	svc := proxier.serviceMap[svcPortName]
	svcInfo, ok := svc.(*serviceInfo)
	if !ok {
		t.Errorf("Failed to cast serviceInfo %q", svcPortName.String())

	} else {
		if svcInfo.hnsID != guid {
			t.Errorf("%v does not match %v", svcInfo.hnsID, guid)
		}
	}

}

func TestCreateDsrLoadBalancer(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, clusterCIDR, "testhost", net.ParseIP("10.0.0.1"), NETWORK_TYPE_OVERLAY)
	if proxier == nil {
		t.Error()
	}

	svcIP := "10.20.30.41"
	svcPort := 80
	svcNodePort := 3001
	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	makeServiceMap(proxier,
		makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP
			svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName.Port,
				Port:     int32(svcPort),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort),
			}}
		}),
	)
	tcpProtocol := v1.ProtocolTCP
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     utilpointer.StringPtr(svcPortName.Port),
				Port:     utilpointer.Int32(int32(svcPort)),
				Protocol: &tcpProtocol,
			}}
		}),
	)

	proxier.setInitialized(true)
	proxier.syncProxyRules()

	svc := proxier.serviceMap[svcPortName]
	svcInfo, ok := svc.(*serviceInfo)
	if !ok {
		t.Errorf("Failed to cast serviceInfo %q", svcPortName.String())

	} else {
		if svcInfo.hnsID != guid {
			t.Errorf("%v does not match %v", svcInfo.hnsID, guid)
		}
		if svcInfo.localTrafficDSR != true {
			t.Errorf("Failed to create DSR loadbalancer with local traffic policy")
		}
	}
}

func TestEndpointSlice(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, clusterCIDR, "testhost", net.ParseIP("10.0.0.1"), NETWORK_TYPE_OVERLAY)
	if proxier == nil {
		t.Error()
	}

	proxier.servicesSynced = true
	proxier.endpointSlicesSynced = true

	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	proxier.OnServiceAdd(&v1.Service{
		ObjectMeta: metav1.ObjectMeta{Name: svcPortName.Name, Namespace: svcPortName.Namespace},
		Spec: v1.ServiceSpec{
			ClusterIP: "172.20.1.1",
			Selector:  map[string]string{"foo": "bar"},
			Ports:     []v1.ServicePort{{Name: svcPortName.Port, TargetPort: intstr.FromInt(80), Protocol: v1.ProtocolTCP}},
		},
	})

	// Add initial endpoint slice
	tcpProtocol := v1.ProtocolTCP
	endpointSlice := &discovery.EndpointSlice{
		ObjectMeta: metav1.ObjectMeta{
			Name:      fmt.Sprintf("%s-1", svcPortName.Name),
			Namespace: svcPortName.Namespace,
			Labels:    map[string]string{discovery.LabelServiceName: svcPortName.Name},
		},
		Ports: []discovery.EndpointPort{{
			Name:     &svcPortName.Port,
			Port:     utilpointer.Int32Ptr(80),
			Protocol: &tcpProtocol,
		}},
		AddressType: discovery.AddressTypeIPv4,
		Endpoints: []discovery.Endpoint{{
			Addresses:  []string{"192.168.2.3"},
			Conditions: discovery.EndpointConditions{Ready: utilpointer.BoolPtr(true)},
			NodeName:   utilpointer.StringPtr("testhost2"),
		}},
	}

	proxier.OnEndpointSliceAdd(endpointSlice)
	proxier.setInitialized(true)
	proxier.syncProxyRules()

	svc := proxier.serviceMap[svcPortName]
	svcInfo, ok := svc.(*serviceInfo)
	if !ok {
		t.Errorf("Failed to cast serviceInfo %q", svcPortName.String())

	} else {
		if svcInfo.hnsID != guid {
			t.Errorf("The Hns Loadbalancer Id %v does not match %v. ServicePortName %q", svcInfo.hnsID, guid, svcPortName.String())
		}
	}

	ep := proxier.endpointsMap[svcPortName][0]
	epInfo, ok := ep.(*endpointsInfo)
	if !ok {
		t.Errorf("Failed to cast endpointsInfo %q", svcPortName.String())

	} else {
		if epInfo.hnsID != guid {
			t.Errorf("Hns EndpointId %v does not match %v. ServicePortName %q", epInfo.hnsID, guid, svcPortName.String())
		}
	}
}

func TestNoopEndpointSlice(t *testing.T) {
	p := Proxier{}
	p.OnEndpointSliceAdd(&discovery.EndpointSlice{})
	p.OnEndpointSliceUpdate(&discovery.EndpointSlice{}, &discovery.EndpointSlice{})
	p.OnEndpointSliceDelete(&discovery.EndpointSlice{})
	p.OnEndpointSlicesSynced()
}

func TestFindRemoteSubnetProviderAddress(t *testing.T) {
	networkInfo, _ := newFakeHNS().getNetworkByName("TestNetwork")
	pa := networkInfo.findRemoteSubnetProviderAddress(providerAddress)

	if pa != providerAddress {
		t.Errorf("%v does not match %v", pa, providerAddress)
	}

	pa = networkInfo.findRemoteSubnetProviderAddress(epIpAddressRemote)

	if pa != providerAddress {
		t.Errorf("%v does not match %v", pa, providerAddress)
	}

	pa = networkInfo.findRemoteSubnetProviderAddress(serviceVip)

	if len(pa) != 0 {
		t.Errorf("Provider address is not empty as expected")
	}
}

func makeNSN(namespace, name string) types.NamespacedName {
	return types.NamespacedName{Namespace: namespace, Name: name}
}

func makeServiceMap(proxier *Proxier, allServices ...*v1.Service) {
	for i := range allServices {
		proxier.OnServiceAdd(allServices[i])
	}

	proxier.mu.Lock()
	defer proxier.mu.Unlock()
	proxier.servicesSynced = true
}
func deleteServices(proxier *Proxier, allServices ...*v1.Service) {
	for i := range allServices {
		proxier.OnServiceDelete(allServices[i])
	}

	proxier.mu.Lock()
	defer proxier.mu.Unlock()
	proxier.servicesSynced = true
}

func makeTestService(namespace, name string, svcFunc func(*v1.Service)) *v1.Service {
	svc := &v1.Service{
		ObjectMeta: metav1.ObjectMeta{
			Name:        name,
			Namespace:   namespace,
			Annotations: map[string]string{},
		},
		Spec:   v1.ServiceSpec{},
		Status: v1.ServiceStatus{},
	}
	svcFunc(svc)
	return svc
}

func deleteEndpointSlices(proxier *Proxier, allEndpointSlices ...*discovery.EndpointSlice) {
	for i := range allEndpointSlices {
		proxier.OnEndpointSliceDelete(allEndpointSlices[i])
	}

	proxier.mu.Lock()
	defer proxier.mu.Unlock()
	proxier.endpointSlicesSynced = true
}

func populateEndpointSlices(proxier *Proxier, allEndpointSlices ...*discovery.EndpointSlice) {
	for i := range allEndpointSlices {
		proxier.OnEndpointSliceAdd(allEndpointSlices[i])
	}
}

func makeTestEndpointSlice(namespace, name string, sliceNum int, epsFunc func(*discovery.EndpointSlice)) *discovery.EndpointSlice {
	eps := &discovery.EndpointSlice{
		ObjectMeta: metav1.ObjectMeta{
			Name:      fmt.Sprintf("%s-%d", name, sliceNum),
			Namespace: namespace,
			Labels:    map[string]string{discovery.LabelServiceName: name},
		},
	}
	epsFunc(eps)
	return eps
}

func Test_kernelSupportsDualstack(t *testing.T) {
	tests := []struct {
		currentVersion hcn.Version
		name           string
		want           bool
	}{
		{
			hcn.Version{Major: 10, Minor: 10},
			"Less than minimal should not be supported",
			false,
		},
		{
			hcn.Version{Major: 9, Minor: 11},
			"Less than minimal should not be supported",
			false,
		},
		{
			hcn.Version{Major: 11, Minor: 1},
			"Less than minimal should not be supported",
			false,
		},
		{
			hcn.Version{Major: 11, Minor: 10},
			"Current version should be supported",
			true,
		},
		{
			hcn.Version{Major: 11, Minor: 11},
			"Greater than minimal version should be supported",
			true,
		},
		{
			hcn.Version{Major: 12, Minor: 1},
			"Greater than minimal version should be supported",
			true,
		},
		{
			hcn.Version{Major: 12, Minor: 12},
			"Greater than minimal should be supported",
			true,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := kernelSupportsDualstack(tt.currentVersion); got != tt.want {
				t.Errorf("kernelSupportsDualstack on version %v: got %v, want %v", tt.currentVersion, got, tt.want)
			}
		})
	}
}
