controllerutil_test.go

/*
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 controllerutil_test

import (
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
	appsv1 "k8s.io/api/apps/v1"
	extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/client-go/kubernetes/scheme"
	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)

var _ = Describe("Controllerutil", func() {
	Describe("SetControllerReference", func() {
		It("should set the OwnerReference if it can find the group version kind", func() {
			rs := &appsv1.ReplicaSet{}
			dep := &extensionsv1beta1.Deployment{
				ObjectMeta: metav1.ObjectMeta{Name: "foo", UID: "foo-uid"},
			}

			Expect(controllerutil.SetControllerReference(dep, rs, scheme.Scheme)).NotTo(HaveOccurred())
			t := true
			Expect(rs.OwnerReferences).To(ConsistOf(metav1.OwnerReference{
				Name:               "foo",
				Kind:               "Deployment",
				APIVersion:         "extensions/v1beta1",
				UID:                "foo-uid",
				Controller:         &t,
				BlockOwnerDeletion: &t,
			}))
		})

		It("should return an error if it can't find the group version kind of the owner", func() {
			rs := &appsv1.ReplicaSet{}
			dep := &extensionsv1beta1.Deployment{
				ObjectMeta: metav1.ObjectMeta{Name: "foo"},
			}
			Expect(controllerutil.SetControllerReference(dep, rs, runtime.NewScheme())).To(HaveOccurred())
		})

		It("should return an error if the owner isn't a runtime.Object", func() {
			rs := &appsv1.ReplicaSet{}
			Expect(controllerutil.SetControllerReference(&errMetaObj{}, rs, scheme.Scheme)).To(HaveOccurred())
		})

		It("should return an error if object is already owned by another controller", func() {
			t := true
			rsOwners := []metav1.OwnerReference{
				metav1.OwnerReference{
					Name:               "bar",
					Kind:               "Deployment",
					APIVersion:         "extensions/v1beta1",
					UID:                "bar-uid",
					Controller:         &t,
					BlockOwnerDeletion: &t,
				},
			}
			rs := &appsv1.ReplicaSet{ObjectMeta: metav1.ObjectMeta{Name: "foo", Namespace: "default", OwnerReferences: rsOwners}}
			dep := &extensionsv1beta1.Deployment{ObjectMeta: metav1.ObjectMeta{Name: "foo", Namespace: "default", UID: "foo-uid"}}

			err := controllerutil.SetControllerReference(dep, rs, scheme.Scheme)

			Expect(err).To(HaveOccurred())
			Expect(err).To(BeAssignableToTypeOf(&controllerutil.AlreadyOwnedError{}))
		})

		It("should not duplicate existing owner reference", func() {
			f := false
			t := true
			rsOwners := []metav1.OwnerReference{
				metav1.OwnerReference{
					Name:               "foo",
					Kind:               "Deployment",
					APIVersion:         "extensions/v1beta1",
					UID:                "foo-uid",
					Controller:         &f,
					BlockOwnerDeletion: &t,
				},
			}
			rs := &appsv1.ReplicaSet{ObjectMeta: metav1.ObjectMeta{Name: "foo", Namespace: "default", OwnerReferences: rsOwners}}
			dep := &extensionsv1beta1.Deployment{ObjectMeta: metav1.ObjectMeta{Name: "foo", Namespace: "default", UID: "foo-uid"}}

			Expect(controllerutil.SetControllerReference(dep, rs, scheme.Scheme)).NotTo(HaveOccurred())
			Expect(rs.OwnerReferences).To(ConsistOf(metav1.OwnerReference{
				Name:               "foo",
				Kind:               "Deployment",
				APIVersion:         "extensions/v1beta1",
				UID:                "foo-uid",
				Controller:         &t,
				BlockOwnerDeletion: &t,
			}))
		})
	})
})

var _ metav1.Object = &errMetaObj{}

type errMetaObj struct {
	metav1.ObjectMeta
}