svctest.SetIPFamilies(api.IPv6Protocol)),
					expectPolicy:   api.IPFamilyPolicyRequireDualStack,
					expectFamilies: []api.IPFamily{api.IPv6Protocol, api.IPv4Protocol},
				}, {
					name: "ClusterIPs:unset_Policy:RequireDualStack_Families:v4v6",
					line: line(),
					svc: svctest.MakeService("foo",
						svctest.SetIPFamilyPolicy(api.IPFamilyPolicyRequireDualStack),

		} else if service.Spec.ClusterIP == api.ClusterIPNone && len(service.Spec.Selector) == 0 {
			// Special-case: headless + selectorless defaults to dual.
			requireDualStack := api.IPFamilyPolicyRequireDualStack
			service.Spec.IPFamilyPolicy = &requireDualStack
		} else {
			// create or update from an object without policy (e.g.
			// ExternalName) to one that needs policy

	// assume IPFamilyPolicy can't be set either.
	if len(service.Spec.IPFamilies) > 0 {
		return
	}

	singleStack := api.IPFamilyPolicySingleStack
	requireDualStack := api.IPFamilyPolicyRequireDualStack

	if service.Spec.ClusterIP == api.ClusterIPNone {
		// Headless.
		if len(service.Spec.Selector) == 0 {
			// Headless + selectorless is a special-case.
			//

	// configured on the cluster
	IPFamilyPolicyPreferDualStack IPFamilyPolicy = "PreferDualStack"
	// IPFamilyPolicyRequireDualStack indicates that this service requires dual-stack. Using
	// IPFamilyPolicyRequireDualStack on a single stack cluster will result in validation errors. The
	// IPFamilies (and their order) assigned  to this service is based on service.spec.ipFamilies. If

	// configured on the cluster
	IPFamilyPolicyPreferDualStack IPFamilyPolicy = "PreferDualStack"
	// IPFamilyPolicyRequireDualStack indicates that this service requires dual-stack. Using
	// IPFamilyPolicyRequireDualStack on a single stack cluster will result in validation errors. The
	// IPFamilies (and their order) assigned  to this service is based on service.spec.ipFamilies. If

			}
		}
	}
}

func TestValidateServiceCreate(t *testing.T) {
	requireDualStack := core.IPFamilyPolicyRequireDualStack
	singleStack := core.IPFamilyPolicySingleStack
	preferDualStack := core.IPFamilyPolicyPreferDualStack

	testCases := []struct {
		name         string

var supportedServiceIPFamily = sets.New(core.IPv4Protocol, core.IPv6Protocol)
var supportedServiceIPFamilyPolicy = sets.New(
	core.IPFamilyPolicySingleStack,
	core.IPFamilyPolicyPreferDualStack,
	core.IPFamilyPolicyRequireDualStack)

// ValidateService tests if required fields/annotations of a Service are valid.
func ValidateService(service *core.Service) field.ErrorList {
	metaPath := field.NewPath("metadata")

a single IPFamily. If the IPFamily is not set in service.spec.ipFamilies then the service will be assigned the default IPFamily configured on the cluster\n - `\"RequireDualStack\"` indicates that this service requires dual-stack. Using IPFamilyPolicyRequireDualStack on a single stack cluster will result in validation errors. The IPFamilies (and their order) assigned to this service is based on service.spec.ipFamilies. If service.spec.ipFamilies was not provided then it will be assigned according to...