// the IPv4 or IPv6 zero CIDR
func IsZeroCIDR(cidr string) bool {
	if cidr == IPv4ZeroCIDR || cidr == IPv6ZeroCIDR {
		return true
	}
	return false
}

// ShouldSkipService checks if a given service should skip proxying
func ShouldSkipService(service *v1.Service) bool {
	// if ClusterIP is "None" or empty, skip proxying
	if !helper.IsServiceIPSet(service) {

//
// NOTE: service object should NOT be modified.
func (sct *ServiceChangeTracker) serviceToServiceMap(service *v1.Service) ServicePortMap {
	if service == nil {
		return nil
	}

	if proxyutil.ShouldSkipService(service) {
		return nil
	}

	clusterIP := proxyutil.GetClusterIPByFamily(sct.ipFamily, service)
	if clusterIP == "" {
		return nil
	}

	svcPortMap := make(ServicePortMap)

				Spec: v1.ServiceSpec{
					ClusterIP: "1.2.3.4",
					Type:      v1.ServiceTypeLoadBalancer,
				},
			},
			shouldSkip: false,
		},
	}

	for i := range testCases {
		skip := ShouldSkipService(testCases[i].service)
		if skip != testCases[i].shouldSkip {
			t.Errorf("case %d: expect %v, got %v", i, testCases[i].shouldSkip, skip)
		}
	}
}

func TestAppendPortIfNeeded(t *testing.T) {