custom-kube-scheduler/kubernetes-v1.15.4/pkg/apis/extensions/v1beta1/defaults_test.go

/*
Copyright 2015 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 v1beta1_test

import (
	"math"
	"reflect"
	"testing"

	extensionsv1beta1 "k8s.io/api/extensions/v1beta1"

	"k8s.io/api/core/v1"
	apiequality "k8s.io/apimachinery/pkg/api/equality"
	"k8s.io/apimachinery/pkg/api/resource"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/util/intstr"
	"k8s.io/kubernetes/pkg/api/legacyscheme"
	api "k8s.io/kubernetes/pkg/apis/core"
	_ "k8s.io/kubernetes/pkg/apis/core/install"
	_ "k8s.io/kubernetes/pkg/apis/extensions/install"
	. "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
	utilpointer "k8s.io/utils/pointer"
)

func TestSetDefaultDaemonSetSpec(t *testing.T) {
	defaultLabels := map[string]string{"foo": "bar"}
	period := int64(v1.DefaultTerminationGracePeriodSeconds)
	defaultTemplate := v1.PodTemplateSpec{
		Spec: v1.PodSpec{
			DNSPolicy:                     v1.DNSClusterFirst,
			RestartPolicy:                 v1.RestartPolicyAlways,
			SecurityContext:               &v1.PodSecurityContext{},
			TerminationGracePeriodSeconds: &period,
			SchedulerName:                 api.DefaultSchedulerName,
		},
		ObjectMeta: metav1.ObjectMeta{
			Labels: defaultLabels,
		},
	}
	templateNoLabel := v1.PodTemplateSpec{
		Spec: v1.PodSpec{
			DNSPolicy:                     v1.DNSClusterFirst,
			RestartPolicy:                 v1.RestartPolicyAlways,
			SecurityContext:               &v1.PodSecurityContext{},
			TerminationGracePeriodSeconds: &period,
			SchedulerName:                 api.DefaultSchedulerName,
		},
	}
	tests := []struct {
		original *extensionsv1beta1.DaemonSet
		expected *extensionsv1beta1.DaemonSet
	}{
		{ // Labels change/defaulting test.
			original: &extensionsv1beta1.DaemonSet{
				Spec: extensionsv1beta1.DaemonSetSpec{
					Template: defaultTemplate,
				},
			},
			expected: &extensionsv1beta1.DaemonSet{
				ObjectMeta: metav1.ObjectMeta{
					Labels: defaultLabels,
				},
				Spec: extensionsv1beta1.DaemonSetSpec{
					Selector: &metav1.LabelSelector{
						MatchLabels: defaultLabels,
					},
					Template: defaultTemplate,
					UpdateStrategy: extensionsv1beta1.DaemonSetUpdateStrategy{
						Type: extensionsv1beta1.OnDeleteDaemonSetStrategyType,
					},
					RevisionHistoryLimit: utilpointer.Int32Ptr(10),
				},
			},
		},
		{ // Labels change/defaulting test.
			original: &extensionsv1beta1.DaemonSet{
				ObjectMeta: metav1.ObjectMeta{
					Labels: map[string]string{
						"bar": "foo",
					},
				},
				Spec: extensionsv1beta1.DaemonSetSpec{
					Template:             defaultTemplate,
					RevisionHistoryLimit: utilpointer.Int32Ptr(1),
				},
			},
			expected: &extensionsv1beta1.DaemonSet{
				ObjectMeta: metav1.ObjectMeta{
					Labels: map[string]string{
						"bar": "foo",
					},
				},
				Spec: extensionsv1beta1.DaemonSetSpec{
					Selector: &metav1.LabelSelector{
						MatchLabels: defaultLabels,
					},
					Template: defaultTemplate,
					UpdateStrategy: extensionsv1beta1.DaemonSetUpdateStrategy{
						Type: extensionsv1beta1.OnDeleteDaemonSetStrategyType,
					},
					RevisionHistoryLimit: utilpointer.Int32Ptr(1),
				},
			},
		},
		{ // Update strategy.
			original: &extensionsv1beta1.DaemonSet{},
			expected: &extensionsv1beta1.DaemonSet{
				Spec: extensionsv1beta1.DaemonSetSpec{
					Template: templateNoLabel,
					UpdateStrategy: extensionsv1beta1.DaemonSetUpdateStrategy{
						Type: extensionsv1beta1.OnDeleteDaemonSetStrategyType,
					},
					RevisionHistoryLimit: utilpointer.Int32Ptr(10),
				},
			},
		},
		{ // Custom unique label key.
			original: &extensionsv1beta1.DaemonSet{
				Spec: extensionsv1beta1.DaemonSetSpec{},
			},
			expected: &extensionsv1beta1.DaemonSet{
				Spec: extensionsv1beta1.DaemonSetSpec{
					Template: templateNoLabel,
					UpdateStrategy: extensionsv1beta1.DaemonSetUpdateStrategy{
						Type: extensionsv1beta1.OnDeleteDaemonSetStrategyType,
					},
					RevisionHistoryLimit: utilpointer.Int32Ptr(10),
				},
			},
		},
	}

	for i, test := range tests {
		original := test.original
		expected := test.expected
		obj2 := roundTrip(t, runtime.Object(original))
		got, ok := obj2.(*extensionsv1beta1.DaemonSet)
		if !ok {
			t.Errorf("(%d) unexpected object: %v", i, got)
			t.FailNow()
		}
		if !apiequality.Semantic.DeepEqual(got.Spec, expected.Spec) {
			t.Errorf("(%d) got different than expected\ngot:\n\t%+v\nexpected:\n\t%+v", i, got.Spec, expected.Spec)
		}
	}
}

func TestSetDefaultDeployment(t *testing.T) {
	defaultIntOrString := intstr.FromInt(1)
	differentIntOrString := intstr.FromInt(5)
	period := int64(v1.DefaultTerminationGracePeriodSeconds)
	defaultTemplate := v1.PodTemplateSpec{
		Spec: v1.PodSpec{
			DNSPolicy:                     v1.DNSClusterFirst,
			RestartPolicy:                 v1.RestartPolicyAlways,
			SecurityContext:               &v1.PodSecurityContext{},
			TerminationGracePeriodSeconds: &period,
			SchedulerName:                 api.DefaultSchedulerName,
		},
	}
	tests := []struct {
		original *extensionsv1beta1.Deployment
		expected *extensionsv1beta1.Deployment
	}{
		{
			original: &extensionsv1beta1.Deployment{},
			expected: &extensionsv1beta1.Deployment{
				Spec: extensionsv1beta1.DeploymentSpec{
					Replicas: utilpointer.Int32Ptr(1),
					Strategy: extensionsv1beta1.DeploymentStrategy{
						Type: extensionsv1beta1.RollingUpdateDeploymentStrategyType,
						RollingUpdate: &extensionsv1beta1.RollingUpdateDeployment{
							MaxSurge:       &defaultIntOrString,
							MaxUnavailable: &defaultIntOrString,
						},
					},
					Template:                defaultTemplate,
					ProgressDeadlineSeconds: utilpointer.Int32Ptr(math.MaxInt32),
					RevisionHistoryLimit:    utilpointer.Int32Ptr(math.MaxInt32),
				},
			},
		},
		{
			original: &extensionsv1beta1.Deployment{
				Spec: extensionsv1beta1.DeploymentSpec{
					Replicas: utilpointer.Int32Ptr(5),
					Strategy: extensionsv1beta1.DeploymentStrategy{
						RollingUpdate: &extensionsv1beta1.RollingUpdateDeployment{
							MaxSurge: &differentIntOrString,
						},
					},
				},
			},
			expected: &extensionsv1beta1.Deployment{
				Spec: extensionsv1beta1.DeploymentSpec{
					Replicas: utilpointer.Int32Ptr(5),
					Strategy: extensionsv1beta1.DeploymentStrategy{
						Type: extensionsv1beta1.RollingUpdateDeploymentStrategyType,
						RollingUpdate: &extensionsv1beta1.RollingUpdateDeployment{
							MaxSurge:       &differentIntOrString,
							MaxUnavailable: &defaultIntOrString,
						},
					},
					Template:                defaultTemplate,
					ProgressDeadlineSeconds: utilpointer.Int32Ptr(math.MaxInt32),
					RevisionHistoryLimit:    utilpointer.Int32Ptr(math.MaxInt32),
				},
			},
		},
		{
			original: &extensionsv1beta1.Deployment{
				Spec: extensionsv1beta1.DeploymentSpec{
					Replicas: utilpointer.Int32Ptr(3),
					Strategy: extensionsv1beta1.DeploymentStrategy{
						Type:          extensionsv1beta1.RollingUpdateDeploymentStrategyType,
						RollingUpdate: nil,
					},
				},
			},
			expected: &extensionsv1beta1.Deployment{
				Spec: extensionsv1beta1.DeploymentSpec{
					Replicas: utilpointer.Int32Ptr(3),
					Strategy: extensionsv1beta1.DeploymentStrategy{
						Type: extensionsv1beta1.RollingUpdateDeploymentStrategyType,
						RollingUpdate: &extensionsv1beta1.RollingUpdateDeployment{
							MaxSurge:       &defaultIntOrString,
							MaxUnavailable: &defaultIntOrString,
						},
					},
					Template:                defaultTemplate,
					ProgressDeadlineSeconds: utilpointer.Int32Ptr(math.MaxInt32),
					RevisionHistoryLimit:    utilpointer.Int32Ptr(math.MaxInt32),
				},
			},
		},
		{
			original: &extensionsv1beta1.Deployment{
				Spec: extensionsv1beta1.DeploymentSpec{
					Replicas: utilpointer.Int32Ptr(5),
					Strategy: extensionsv1beta1.DeploymentStrategy{
						Type: extensionsv1beta1.RecreateDeploymentStrategyType,
					},
				},
			},
			expected: &extensionsv1beta1.Deployment{
				Spec: extensionsv1beta1.DeploymentSpec{
					Replicas: utilpointer.Int32Ptr(5),
					Strategy: extensionsv1beta1.DeploymentStrategy{
						Type: extensionsv1beta1.RecreateDeploymentStrategyType,
					},
					Template:                defaultTemplate,
					ProgressDeadlineSeconds: utilpointer.Int32Ptr(math.MaxInt32),
					RevisionHistoryLimit:    utilpointer.Int32Ptr(math.MaxInt32),
				},
			},
		},
		{
			original: &extensionsv1beta1.Deployment{
				Spec: extensionsv1beta1.DeploymentSpec{
					Replicas: utilpointer.Int32Ptr(5),
					Strategy: extensionsv1beta1.DeploymentStrategy{
						Type: extensionsv1beta1.RecreateDeploymentStrategyType,
					},
					ProgressDeadlineSeconds: utilpointer.Int32Ptr(30),
				},
			},
			expected: &extensionsv1beta1.Deployment{
				Spec: extensionsv1beta1.DeploymentSpec{
					Replicas: utilpointer.Int32Ptr(5),
					Strategy: extensionsv1beta1.DeploymentStrategy{
						Type: extensionsv1beta1.RecreateDeploymentStrategyType,
					},
					Template:                defaultTemplate,
					ProgressDeadlineSeconds: utilpointer.Int32Ptr(30),
					RevisionHistoryLimit:    utilpointer.Int32Ptr(math.MaxInt32),
				},
			},
		},
	}

	for _, test := range tests {
		original := test.original
		expected := test.expected
		obj2 := roundTrip(t, runtime.Object(original))
		got, ok := obj2.(*extensionsv1beta1.Deployment)
		if !ok {
			t.Errorf("unexpected object: %v", got)
			t.FailNow()
		}
		if !apiequality.Semantic.DeepEqual(got.Spec, expected.Spec) {
			t.Errorf("object mismatch!\nexpected:\n\t%+v\ngot:\n\t%+v", got.Spec, expected.Spec)
		}
	}
}

func TestSetDefaultReplicaSet(t *testing.T) {
	tests := []struct {
		rs             *extensionsv1beta1.ReplicaSet
		expectLabels   bool
		expectSelector bool
	}{
		{
			rs: &extensionsv1beta1.ReplicaSet{
				Spec: extensionsv1beta1.ReplicaSetSpec{
					Template: v1.PodTemplateSpec{
						ObjectMeta: metav1.ObjectMeta{
							Labels: map[string]string{
								"foo": "bar",
							},
						},
					},
				},
			},
			expectLabels:   true,
			expectSelector: true,
		},
		{
			rs: &extensionsv1beta1.ReplicaSet{
				ObjectMeta: metav1.ObjectMeta{
					Labels: map[string]string{
						"bar": "foo",
					},
				},
				Spec: extensionsv1beta1.ReplicaSetSpec{
					Template: v1.PodTemplateSpec{
						ObjectMeta: metav1.ObjectMeta{
							Labels: map[string]string{
								"foo": "bar",
							},
						},
					},
				},
			},
			expectLabels:   false,
			expectSelector: true,
		},
		{
			rs: &extensionsv1beta1.ReplicaSet{
				ObjectMeta: metav1.ObjectMeta{
					Labels: map[string]string{
						"bar": "foo",
					},
				},
				Spec: extensionsv1beta1.ReplicaSetSpec{
					Selector: &metav1.LabelSelector{
						MatchLabels: map[string]string{
							"some": "other",
						},
					},
					Template: v1.PodTemplateSpec{
						ObjectMeta: metav1.ObjectMeta{
							Labels: map[string]string{
								"foo": "bar",
							},
						},
					},
				},
			},
			expectLabels:   false,
			expectSelector: false,
		},
		{
			rs: &extensionsv1beta1.ReplicaSet{
				Spec: extensionsv1beta1.ReplicaSetSpec{
					Selector: &metav1.LabelSelector{
						MatchLabels: map[string]string{
							"some": "other",
						},
					},
					Template: v1.PodTemplateSpec{
						ObjectMeta: metav1.ObjectMeta{
							Labels: map[string]string{
								"foo": "bar",
							},
						},
					},
				},
			},
			expectLabels:   true,
			expectSelector: false,
		},
	}

	for _, test := range tests {
		rs := test.rs
		obj2 := roundTrip(t, runtime.Object(rs))
		rs2, ok := obj2.(*extensionsv1beta1.ReplicaSet)
		if !ok {
			t.Errorf("unexpected object: %v", rs2)
			t.FailNow()
		}
		if test.expectSelector != reflect.DeepEqual(rs2.Spec.Selector.MatchLabels, rs2.Spec.Template.Labels) {
			if test.expectSelector {
				t.Errorf("expected: %v, got: %v", rs2.Spec.Template.Labels, rs2.Spec.Selector)
			} else {
				t.Errorf("unexpected equality: %v", rs.Spec.Selector)
			}
		}
		if test.expectLabels != reflect.DeepEqual(rs2.Labels, rs2.Spec.Template.Labels) {
			if test.expectLabels {
				t.Errorf("expected: %v, got: %v", rs2.Spec.Template.Labels, rs2.Labels)
			} else {
				t.Errorf("unexpected equality: %v", rs.Labels)
			}
		}
	}
}

func TestSetDefaultReplicaSetReplicas(t *testing.T) {
	tests := []struct {
		rs             extensionsv1beta1.ReplicaSet
		expectReplicas int32
	}{
		{
			rs: extensionsv1beta1.ReplicaSet{
				Spec: extensionsv1beta1.ReplicaSetSpec{
					Template: v1.PodTemplateSpec{
						ObjectMeta: metav1.ObjectMeta{
							Labels: map[string]string{
								"foo": "bar",
							},
						},
					},
				},
			},
			expectReplicas: 1,
		},
		{
			rs: extensionsv1beta1.ReplicaSet{
				Spec: extensionsv1beta1.ReplicaSetSpec{
					Replicas: utilpointer.Int32Ptr(0),
					Template: v1.PodTemplateSpec{
						ObjectMeta: metav1.ObjectMeta{
							Labels: map[string]string{
								"foo": "bar",
							},
						},
					},
				},
			},
			expectReplicas: 0,
		},
		{
			rs: extensionsv1beta1.ReplicaSet{
				Spec: extensionsv1beta1.ReplicaSetSpec{
					Replicas: utilpointer.Int32Ptr(3),
					Template: v1.PodTemplateSpec{
						ObjectMeta: metav1.ObjectMeta{
							Labels: map[string]string{
								"foo": "bar",
							},
						},
					},
				},
			},
			expectReplicas: 3,
		},
	}

	for _, test := range tests {
		rs := &test.rs
		obj2 := roundTrip(t, runtime.Object(rs))
		rs2, ok := obj2.(*extensionsv1beta1.ReplicaSet)
		if !ok {
			t.Errorf("unexpected object: %v", rs2)
			t.FailNow()
		}
		if rs2.Spec.Replicas == nil {
			t.Errorf("unexpected nil Replicas")
		} else if test.expectReplicas != *rs2.Spec.Replicas {
			t.Errorf("expected: %d replicas, got: %d", test.expectReplicas, *rs2.Spec.Replicas)
		}
	}
}

func TestDefaultRequestIsNotSetForReplicaSet(t *testing.T) {
	s := v1.PodSpec{}
	s.Containers = []v1.Container{
		{
			Resources: v1.ResourceRequirements{
				Limits: v1.ResourceList{
					v1.ResourceCPU: resource.MustParse("100m"),
				},
			},
		},
	}
	rs := &extensionsv1beta1.ReplicaSet{
		Spec: extensionsv1beta1.ReplicaSetSpec{
			Replicas: utilpointer.Int32Ptr(3),
			Template: v1.PodTemplateSpec{
				ObjectMeta: metav1.ObjectMeta{
					Labels: map[string]string{
						"foo": "bar",
					},
				},
				Spec: s,
			},
		},
	}
	output := roundTrip(t, runtime.Object(rs))
	rs2 := output.(*extensionsv1beta1.ReplicaSet)
	defaultRequest := rs2.Spec.Template.Spec.Containers[0].Resources.Requests
	requestValue := defaultRequest[v1.ResourceCPU]
	if requestValue.String() != "0" {
		t.Errorf("Expected 0 request value, got: %s", requestValue.String())
	}
}

func TestDefaultAllowPrivilegeEscalationForPodSecurityPolicy(t *testing.T) {
	psp := &extensionsv1beta1.PodSecurityPolicy{}
	output := roundTrip(t, runtime.Object(psp))
	psp2 := output.(*extensionsv1beta1.PodSecurityPolicy)
	if psp2.Spec.AllowPrivilegeEscalation == nil || *psp2.Spec.AllowPrivilegeEscalation != true {
		t.Errorf("Expected default to true, got: %#v", psp2.Spec.AllowPrivilegeEscalation)
	}
}

func TestSetDefaultNetworkPolicy(t *testing.T) {
	tests := []struct {
		original *extensionsv1beta1.NetworkPolicy
		expected *extensionsv1beta1.NetworkPolicy
	}{
		{ // Empty NetworkPolicy should be set to PolicyTypes Ingress
			original: &extensionsv1beta1.NetworkPolicy{
				Spec: extensionsv1beta1.NetworkPolicySpec{
					PodSelector: metav1.LabelSelector{
						MatchLabels: map[string]string{"a": "b"},
					},
				},
			},
			expected: &extensionsv1beta1.NetworkPolicy{
				Spec: extensionsv1beta1.NetworkPolicySpec{
					PodSelector: metav1.LabelSelector{
						MatchLabels: map[string]string{"a": "b"},
					},
					PolicyTypes: []extensionsv1beta1.PolicyType{extensionsv1beta1.PolicyTypeIngress},
				},
			},
		},
		{ // Empty Ingress NetworkPolicy should be set to PolicyTypes Ingress
			original: &extensionsv1beta1.NetworkPolicy{
				Spec: extensionsv1beta1.NetworkPolicySpec{
					PodSelector: metav1.LabelSelector{
						MatchLabels: map[string]string{"a": "b"},
					},
					Ingress: []extensionsv1beta1.NetworkPolicyIngressRule{},
				},
			},
			expected: &extensionsv1beta1.NetworkPolicy{
				Spec: extensionsv1beta1.NetworkPolicySpec{
					PodSelector: metav1.LabelSelector{
						MatchLabels: map[string]string{"a": "b"},
					},
					Ingress:     []extensionsv1beta1.NetworkPolicyIngressRule{},
					PolicyTypes: []extensionsv1beta1.PolicyType{extensionsv1beta1.PolicyTypeIngress},
				},
			},
		},
		{ // Defined Ingress and Egress should be set to Ingress,Egress
			original: &extensionsv1beta1.NetworkPolicy{
				Spec: extensionsv1beta1.NetworkPolicySpec{
					PodSelector: metav1.LabelSelector{
						MatchLabels: map[string]string{"a": "b"},
					},
					Ingress: []extensionsv1beta1.NetworkPolicyIngressRule{
						{
							From: []extensionsv1beta1.NetworkPolicyPeer{
								{
									PodSelector: &metav1.LabelSelector{
										MatchLabels: map[string]string{"c": "d"},
									},
									NamespaceSelector: &metav1.LabelSelector{
										MatchLabels: map[string]string{"c": "d"},
									},
								},
							},
						},
					},
					Egress: []extensionsv1beta1.NetworkPolicyEgressRule{
						{
							To: []extensionsv1beta1.NetworkPolicyPeer{
								{
									NamespaceSelector: &metav1.LabelSelector{
										MatchLabels: map[string]string{"c": "d"},
									},
								},
							},
						},
					},
				},
			},
			expected: &extensionsv1beta1.NetworkPolicy{
				Spec: extensionsv1beta1.NetworkPolicySpec{
					PodSelector: metav1.LabelSelector{
						MatchLabels: map[string]string{"a": "b"},
					},
					Ingress: []extensionsv1beta1.NetworkPolicyIngressRule{
						{
							From: []extensionsv1beta1.NetworkPolicyPeer{
								{
									PodSelector: &metav1.LabelSelector{
										MatchLabels: map[string]string{"c": "d"},
									},
									NamespaceSelector: &metav1.LabelSelector{
										MatchLabels: map[string]string{"c": "d"},
									},
								},
							},
						},
					},
					Egress: []extensionsv1beta1.NetworkPolicyEgressRule{
						{
							To: []extensionsv1beta1.NetworkPolicyPeer{
								{
									NamespaceSelector: &metav1.LabelSelector{
										MatchLabels: map[string]string{"c": "d"},
									},
								},
							},
						},
					},
					PolicyTypes: []extensionsv1beta1.PolicyType{extensionsv1beta1.PolicyTypeIngress, extensionsv1beta1.PolicyTypeEgress},
				},
			},
		},
		{ // Egress only with unset PolicyTypes should be set to Ingress, Egress
			original: &extensionsv1beta1.NetworkPolicy{
				Spec: extensionsv1beta1.NetworkPolicySpec{
					PodSelector: metav1.LabelSelector{
						MatchLabels: map[string]string{"a": "b"},
					},
					Egress: []extensionsv1beta1.NetworkPolicyEgressRule{
						{
							To: []extensionsv1beta1.NetworkPolicyPeer{
								{
									NamespaceSelector: &metav1.LabelSelector{
										MatchLabels: map[string]string{"c": "d"},
									},
								},
							},
						},
					},
				},
			},
			expected: &extensionsv1beta1.NetworkPolicy{
				Spec: extensionsv1beta1.NetworkPolicySpec{
					PodSelector: metav1.LabelSelector{
						MatchLabels: map[string]string{"a": "b"},
					},
					Egress: []extensionsv1beta1.NetworkPolicyEgressRule{
						{
							To: []extensionsv1beta1.NetworkPolicyPeer{
								{
									NamespaceSelector: &metav1.LabelSelector{
										MatchLabels: map[string]string{"c": "d"},
									},
								},
							},
						},
					},
					PolicyTypes: []extensionsv1beta1.PolicyType{extensionsv1beta1.PolicyTypeIngress, extensionsv1beta1.PolicyTypeEgress},
				},
			},
		},
		{ // Egress only with PolicyTypes set to Egress should be set to only Egress
			original: &extensionsv1beta1.NetworkPolicy{
				Spec: extensionsv1beta1.NetworkPolicySpec{
					PodSelector: metav1.LabelSelector{
						MatchLabels: map[string]string{"a": "b"},
					},
					Egress: []extensionsv1beta1.NetworkPolicyEgressRule{
						{
							To: []extensionsv1beta1.NetworkPolicyPeer{
								{
									NamespaceSelector: &metav1.LabelSelector{
										MatchLabels: map[string]string{"Egress": "only"},
									},
								},
							},
						},
					},
					PolicyTypes: []extensionsv1beta1.PolicyType{extensionsv1beta1.PolicyTypeEgress},
				},
			},
			expected: &extensionsv1beta1.NetworkPolicy{
				Spec: extensionsv1beta1.NetworkPolicySpec{
					PodSelector: metav1.LabelSelector{
						MatchLabels: map[string]string{"a": "b"},
					},
					Egress: []extensionsv1beta1.NetworkPolicyEgressRule{
						{
							To: []extensionsv1beta1.NetworkPolicyPeer{
								{
									NamespaceSelector: &metav1.LabelSelector{
										MatchLabels: map[string]string{"Egress": "only"},
									},
								},
							},
						},
					},
					PolicyTypes: []extensionsv1beta1.PolicyType{extensionsv1beta1.PolicyTypeEgress},
				},
			},
		},
	}

	for i, test := range tests {
		original := test.original
		expected := test.expected
		obj2 := roundTrip(t, runtime.Object(original))
		got, ok := obj2.(*extensionsv1beta1.NetworkPolicy)
		if !ok {
			t.Errorf("(%d) unexpected object: %v", i, got)
			t.FailNow()
		}
		if !apiequality.Semantic.DeepEqual(got.Spec, expected.Spec) {
			t.Errorf("(%d) got different than expected\ngot:\n\t%+v\nexpected:\n\t%+v", i, got.Spec, expected.Spec)
		}
	}
}

func roundTrip(t *testing.T, obj runtime.Object) runtime.Object {
	data, err := runtime.Encode(legacyscheme.Codecs.LegacyCodec(SchemeGroupVersion), obj)
	if err != nil {
		t.Errorf("%v\n %#v", err, obj)
		return nil
	}
	obj2, err := runtime.Decode(legacyscheme.Codecs.UniversalDecoder(), data)
	if err != nil {
		t.Errorf("%v\nData: %s\nSource: %#v", err, string(data), obj)
		return nil
	}
	obj3 := reflect.New(reflect.TypeOf(obj).Elem()).Interface().(runtime.Object)
	err = legacyscheme.Scheme.Convert(obj2, obj3, nil)
	if err != nil {
		t.Errorf("%v\nSource: %#v", err, obj2)
		return nil
	}
	return obj3
}