kubernetes/pkg/registry/endpoint/etcd/etcd_test.go

/*
Copyright 2015 The Kubernetes Authors All rights reserved.

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 etcd

import (
	"testing"

	"k8s.io/kubernetes/pkg/api"
	"k8s.io/kubernetes/pkg/api/rest/resttest"
	"k8s.io/kubernetes/pkg/api/testapi"
	"k8s.io/kubernetes/pkg/registry/registrytest"
	"k8s.io/kubernetes/pkg/runtime"
	"k8s.io/kubernetes/pkg/tools"
	"k8s.io/kubernetes/pkg/tools/etcdtest"
	"k8s.io/kubernetes/pkg/util"

	"github.com/coreos/go-etcd/etcd"
)

func newStorage(t *testing.T) (*REST, *tools.FakeEtcdClient) {
	etcdStorage, fakeClient := registrytest.NewEtcdStorage(t)
	return NewREST(etcdStorage, false), fakeClient
}

func validNewEndpoints() *api.Endpoints {
	return &api.Endpoints{
		ObjectMeta: api.ObjectMeta{
			Name:      "foo",
			Namespace: api.NamespaceDefault,
		},
		Subsets: []api.EndpointSubset{{
			Addresses: []api.EndpointAddress{{IP: "1.2.3.4"}},
			Ports:     []api.EndpointPort{{Port: 80, Protocol: "TCP"}},
		}},
	}
}

func validChangedEndpoints() *api.Endpoints {
	endpoints := validNewEndpoints()
	endpoints.ResourceVersion = "1"
	endpoints.Subsets = []api.EndpointSubset{{
		Addresses: []api.EndpointAddress{{IP: "1.2.3.4"}, {IP: "5.6.7.8"}},
		Ports:     []api.EndpointPort{{Port: 80, Protocol: "TCP"}},
	}}
	return endpoints
}

func TestCreate(t *testing.T) {
	storage, fakeClient := newStorage(t)
	test := resttest.New(t, storage, fakeClient.SetError)
	endpoints := validNewEndpoints()
	endpoints.ObjectMeta = api.ObjectMeta{}
	test.TestCreate(
		// valid
		endpoints,
		// invalid
		&api.Endpoints{
			ObjectMeta: api.ObjectMeta{Name: "_-a123-a_"},
		},
	)
}

func TestDelete(t *testing.T) {
	ctx := api.NewDefaultContext()
	storage, fakeClient := newStorage(t)
	test := resttest.New(t, storage, fakeClient.SetError)

	endpoints := validChangedEndpoints()
	key, _ := storage.KeyFunc(ctx, endpoints.Name)
	key = etcdtest.AddPrefix(key)
	createFn := func() runtime.Object {
		fakeClient.Data[key] = tools.EtcdResponseWithError{
			R: &etcd.Response{
				Node: &etcd.Node{
					Value:         runtime.EncodeOrDie(testapi.Codec(), endpoints),
					ModifiedIndex: 1,
				},
			},
		}
		return endpoints
	}
	gracefulSetFn := func() bool {
		if fakeClient.Data[key].R.Node == nil {
			return false
		}
		return fakeClient.Data[key].R.Node.TTL == 30
	}
	test.TestDelete(createFn, gracefulSetFn)
}

func TestEtcdGetEndpoints(t *testing.T) {
	storage, fakeClient := newStorage(t)
	test := resttest.New(t, storage, fakeClient.SetError)
	endpoints := validNewEndpoints()
	test.TestGet(endpoints)
}

func TestEtcdListEndpoints(t *testing.T) {
	storage, fakeClient := newStorage(t)
	test := resttest.New(t, storage, fakeClient.SetError)
	endpoints := validNewEndpoints()
	key := etcdtest.AddPrefix(storage.KeyRootFunc(test.TestContext()))
	test.TestList(
		endpoints,
		func(objects []runtime.Object) []runtime.Object {
			return registrytest.SetObjectsForKey(fakeClient, key, objects)
		},
		func(resourceVersion uint64) {
			registrytest.SetResourceVersion(fakeClient, resourceVersion)
		})
}

func TestEndpointsDecode(t *testing.T) {
	storage, _ := newStorage(t)
	expected := validNewEndpoints()
	body, err := testapi.Codec().Encode(expected)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	actual := storage.New()
	if err := testapi.Codec().DecodeInto(body, actual); err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	if !api.Semantic.DeepEqual(expected, actual) {
		t.Errorf("mismatch: %s", util.ObjectDiff(expected, actual))
	}
}

func TestEtcdUpdateEndpoints(t *testing.T) {
	ctx := api.NewDefaultContext()
	storage, fakeClient := newStorage(t)
	endpoints := validChangedEndpoints()

	key, _ := storage.KeyFunc(ctx, "foo")
	key = etcdtest.AddPrefix(key)
	fakeClient.Set(key, runtime.EncodeOrDie(testapi.Codec(), validNewEndpoints()), 0)

	_, _, err := storage.Update(ctx, endpoints)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}

	response, err := fakeClient.Get(key, false, false)
	if err != nil {
		t.Fatalf("Unexpected error %v", err)
	}
	var endpointsOut api.Endpoints
	err = testapi.Codec().DecodeInto([]byte(response.Node.Value), &endpointsOut)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}

	endpoints.ObjectMeta.ResourceVersion = endpointsOut.ObjectMeta.ResourceVersion
	if !api.Semantic.DeepEqual(endpoints, &endpointsOut) {
		t.Errorf("Unexpected endpoints: %#v, expected %#v", &endpointsOut, endpoints)
	}
}

func TestDeleteEndpoints(t *testing.T) {
	ctx := api.NewDefaultContext()
	storage, fakeClient := newStorage(t)
	endpoints := validNewEndpoints()
	name := endpoints.Name
	key, _ := storage.KeyFunc(ctx, name)
	key = etcdtest.AddPrefix(key)
	fakeClient.ChangeIndex = 1
	fakeClient.Data[key] = tools.EtcdResponseWithError{
		R: &etcd.Response{
			Node: &etcd.Node{
				Value:         runtime.EncodeOrDie(testapi.Codec(), endpoints),
				ModifiedIndex: 1,
				CreatedIndex:  1,
			},
		},
	}
	_, err := storage.Delete(ctx, name, nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
}