mirror of https://github.com/k3s-io/k3s
638 lines
19 KiB
Go
638 lines
19 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package etcd
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import (
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"fmt"
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"math/rand"
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"net"
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"net/http"
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"net/http/httptest"
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"path"
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"reflect"
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"strconv"
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"sync"
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"testing"
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"time"
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"github.com/coreos/go-etcd/etcd"
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"github.com/stretchr/testify/assert"
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"golang.org/x/net/context"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/testapi"
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apitesting "k8s.io/kubernetes/pkg/api/testing"
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"k8s.io/kubernetes/pkg/conversion"
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"k8s.io/kubernetes/pkg/runtime"
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"k8s.io/kubernetes/pkg/storage"
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etcdtesting "k8s.io/kubernetes/pkg/storage/etcd/testing"
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storagetesting "k8s.io/kubernetes/pkg/storage/testing"
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// TODO: once fakeClient has been purged move utils
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// and eliminate these deps
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"k8s.io/kubernetes/pkg/tools"
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"k8s.io/kubernetes/pkg/tools/etcdtest"
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)
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const validEtcdVersion = "etcd 2.0.9"
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var scheme *runtime.Scheme
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var codec runtime.Codec
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func init() {
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scheme = runtime.NewScheme()
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scheme.AddKnownTypes("", &storagetesting.TestResource{})
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scheme.AddKnownTypes(testapi.Default.Version(), &storagetesting.TestResource{})
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codec = runtime.CodecFor(scheme, testapi.Default.Version())
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scheme.AddConversionFuncs(
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func(in *storagetesting.TestResource, out *storagetesting.TestResource, s conversion.Scope) error {
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*out = *in
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return nil
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},
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)
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}
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func newEtcdHelper(client tools.EtcdClient, codec runtime.Codec, prefix string) etcdHelper {
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return *NewEtcdStorage(client, codec, prefix).(*etcdHelper)
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}
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func TestIsEtcdNotFound(t *testing.T) {
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try := func(err error, isNotFound bool) {
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if IsEtcdNotFound(err) != isNotFound {
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t.Errorf("Expected %#v to return %v, but it did not", err, isNotFound)
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}
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}
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try(tools.EtcdErrorNotFound, true)
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try(&etcd.EtcdError{ErrorCode: 101}, false)
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try(nil, false)
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try(fmt.Errorf("some other kind of error"), false)
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}
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// Returns an encoded version of api.Pod with the given name.
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func getEncodedPod(name string) string {
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pod, _ := testapi.Default.Codec().Encode(&api.Pod{
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ObjectMeta: api.ObjectMeta{Name: name},
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})
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return string(pod)
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}
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func createObj(t *testing.T, helper etcdHelper, name string, obj, out runtime.Object, ttl uint64) error {
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err := helper.Create(context.TODO(), name, obj, out, ttl)
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if err != nil {
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t.Errorf("Unexpected error %v", err)
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}
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return err
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}
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func createPodList(t *testing.T, helper etcdHelper, list *api.PodList) error {
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for i := range list.Items {
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returnedObj := &api.Pod{}
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err := createObj(t, helper, list.Items[i].Name, &list.Items[i], returnedObj, 0)
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if err != nil {
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return err
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}
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list.Items[i] = *returnedObj
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}
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return nil
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}
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func TestList(t *testing.T) {
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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key := etcdtest.AddPrefix("/some/key")
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helper := newEtcdHelper(server.Client, testapi.Default.Codec(), key)
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list := api.PodList{
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Items: []api.Pod{
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{
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ObjectMeta: api.ObjectMeta{Name: "bar"},
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Spec: apitesting.DeepEqualSafePodSpec(),
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},
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{
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ObjectMeta: api.ObjectMeta{Name: "baz"},
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Spec: apitesting.DeepEqualSafePodSpec(),
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},
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{
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ObjectMeta: api.ObjectMeta{Name: "foo"},
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Spec: apitesting.DeepEqualSafePodSpec(),
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},
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},
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}
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createPodList(t, helper, &list)
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var got api.PodList
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// TODO: a sorted filter function could be applied such implied
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// ordering on the returned list doesn't matter.
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err := helper.List(context.TODO(), key, 0, storage.Everything, &got)
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if err != nil {
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t.Errorf("Unexpected error %v", err)
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}
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if e, a := list.Items, got.Items; !reflect.DeepEqual(e, a) {
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t.Errorf("Expected %#v, got %#v", e, a)
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}
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}
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func TestListFiltered(t *testing.T) {
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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key := etcdtest.AddPrefix("/some/key")
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helper := newEtcdHelper(server.Client, testapi.Default.Codec(), key)
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list := api.PodList{
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Items: []api.Pod{
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{
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ObjectMeta: api.ObjectMeta{Name: "bar"},
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Spec: apitesting.DeepEqualSafePodSpec(),
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},
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{
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ObjectMeta: api.ObjectMeta{Name: "baz"},
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Spec: apitesting.DeepEqualSafePodSpec(),
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},
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{
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ObjectMeta: api.ObjectMeta{Name: "foo"},
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Spec: apitesting.DeepEqualSafePodSpec(),
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},
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},
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}
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createPodList(t, helper, &list)
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filter := func(obj runtime.Object) bool {
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pod := obj.(*api.Pod)
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return pod.Name == "bar"
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}
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var got api.PodList
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err := helper.List(context.TODO(), key, 0, filter, &got)
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if err != nil {
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t.Errorf("Unexpected error %v", err)
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}
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// Check to make certain that the filter function only returns "bar"
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if e, a := list.Items[0], got.Items[0]; !reflect.DeepEqual(e, a) {
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t.Errorf("Expected %#v, got %#v", e, a)
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}
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}
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// TestListAcrossDirectories ensures that the client excludes directories and flattens tree-response - simulates cross-namespace query
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func TestListAcrossDirectories(t *testing.T) {
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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rootkey := etcdtest.AddPrefix("/some/key")
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key1 := etcdtest.AddPrefix("/some/key/directory1")
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key2 := etcdtest.AddPrefix("/some/key/directory2")
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roothelper := newEtcdHelper(server.Client, testapi.Default.Codec(), rootkey)
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helper1 := newEtcdHelper(server.Client, testapi.Default.Codec(), key1)
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helper2 := newEtcdHelper(server.Client, testapi.Default.Codec(), key2)
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list := api.PodList{
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Items: []api.Pod{
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{
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ObjectMeta: api.ObjectMeta{Name: "baz"},
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Spec: apitesting.DeepEqualSafePodSpec(),
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},
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{
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ObjectMeta: api.ObjectMeta{Name: "foo"},
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Spec: apitesting.DeepEqualSafePodSpec(),
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},
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{
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ObjectMeta: api.ObjectMeta{Name: "bar"},
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Spec: apitesting.DeepEqualSafePodSpec(),
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},
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},
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}
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returnedObj := &api.Pod{}
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// create the 1st 2 elements in one directory
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createObj(t, helper1, list.Items[0].Name, &list.Items[0], returnedObj, 0)
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list.Items[0] = *returnedObj
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createObj(t, helper1, list.Items[1].Name, &list.Items[1], returnedObj, 0)
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list.Items[1] = *returnedObj
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// create the last element in the other directory
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createObj(t, helper2, list.Items[2].Name, &list.Items[2], returnedObj, 0)
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list.Items[2] = *returnedObj
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var got api.PodList
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err := roothelper.List(context.TODO(), rootkey, 0, storage.Everything, &got)
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if err != nil {
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t.Errorf("Unexpected error %v", err)
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}
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if e, a := list.Items, got.Items; !reflect.DeepEqual(e, a) {
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t.Errorf("Expected %#v, got %#v", e, a)
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}
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}
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func TestGet(t *testing.T) {
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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key := etcdtest.AddPrefix("/some/key")
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helper := newEtcdHelper(server.Client, testapi.Default.Codec(), key)
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expect := api.Pod{
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ObjectMeta: api.ObjectMeta{Name: "foo"},
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Spec: apitesting.DeepEqualSafePodSpec(),
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}
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var got api.Pod
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if err := helper.Set(context.TODO(), key, &expect, &got, 0); err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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expect = got
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if err := helper.Get(context.TODO(), key, &got, false); err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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if !reflect.DeepEqual(got, expect) {
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t.Errorf("Wanted %#v, got %#v", expect, got)
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}
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}
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func TestGetNotFoundErr(t *testing.T) {
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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key := etcdtest.AddPrefix("/some/key")
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boguskey := etcdtest.AddPrefix("/some/boguskey")
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helper := newEtcdHelper(server.Client, testapi.Default.Codec(), key)
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var got api.Pod
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err := helper.Get(context.TODO(), boguskey, &got, false)
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if !IsEtcdNotFound(err) {
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t.Errorf("Unexpected reponse on key=%v, err=%v", key, err)
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}
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}
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func TestCreate(t *testing.T) {
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obj := &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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helper := newEtcdHelper(server.Client, testapi.Default.Codec(), etcdtest.PathPrefix())
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returnedObj := &api.Pod{}
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err := helper.Create(context.TODO(), "/some/key", obj, returnedObj, 5)
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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_, err = testapi.Default.Codec().Encode(obj)
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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err = helper.Get(context.TODO(), "/some/key", returnedObj, false)
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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_, err = testapi.Default.Codec().Encode(returnedObj)
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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if obj.Name != returnedObj.Name {
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t.Errorf("Wanted %v, got %v", obj.Name, returnedObj.Name)
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}
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}
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func TestCreateNilOutParam(t *testing.T) {
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obj := &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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helper := newEtcdHelper(server.Client, testapi.Default.Codec(), etcdtest.PathPrefix())
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err := helper.Create(context.TODO(), "/some/key", obj, nil, 5)
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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}
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func TestSet(t *testing.T) {
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obj := &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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helper := newEtcdHelper(server.Client, testapi.Default.Codec(), etcdtest.PathPrefix())
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returnedObj := &api.Pod{}
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err := helper.Set(context.TODO(), "/some/key", obj, returnedObj, 5)
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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if obj.ObjectMeta.Name == returnedObj.ObjectMeta.Name {
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// Set worked, now override the values.
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obj = returnedObj
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}
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err = helper.Get(context.TODO(), "/some/key", returnedObj, false)
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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if !reflect.DeepEqual(obj, returnedObj) {
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t.Errorf("Wanted %#v, got %#v", obj, returnedObj)
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}
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}
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func TestSetFailCAS(t *testing.T) {
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obj := &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo", ResourceVersion: "1"}}
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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helper := newEtcdHelper(server.Client, testapi.Default.Codec(), etcdtest.PathPrefix())
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err := helper.Set(context.TODO(), "/some/key", obj, nil, 5)
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if err == nil {
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t.Errorf("Expecting error.")
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}
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}
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func TestSetWithVersion(t *testing.T) {
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obj := &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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helper := newEtcdHelper(server.Client, testapi.Default.Codec(), etcdtest.PathPrefix())
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returnedObj := &api.Pod{}
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err := helper.Set(context.TODO(), "/some/key", obj, returnedObj, 7)
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if err != nil {
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t.Fatalf("Unexpected error %#v", err)
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}
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// resource revision is now set, try to set again with new value to test CAS
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obj = returnedObj
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obj.Name = "bar"
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err = helper.Set(context.TODO(), "/some/key", obj, returnedObj, 7)
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if err != nil {
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t.Fatalf("Unexpected error %#v", err)
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}
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if returnedObj.Name != "bar" {
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t.Fatalf("Unexpected error %#v", returnedObj)
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}
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}
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func TestSetWithoutResourceVersioner(t *testing.T) {
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obj := &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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helper := newEtcdHelper(server.Client, testapi.Default.Codec(), etcdtest.PathPrefix())
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helper.versioner = nil
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returnedObj := &api.Pod{}
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err := helper.Set(context.TODO(), "/some/key", obj, returnedObj, 3)
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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if returnedObj.ResourceVersion != "" {
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t.Errorf("Resource revision should not be set on returned objects")
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}
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}
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func TestSetNilOutParam(t *testing.T) {
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obj := &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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helper := newEtcdHelper(server.Client, testapi.Default.Codec(), etcdtest.PathPrefix())
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helper.versioner = nil
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err := helper.Set(context.TODO(), "/some/key", obj, nil, 3)
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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}
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func TestGuaranteedUpdate(t *testing.T) {
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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key := etcdtest.AddPrefix("/some/key")
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helper := newEtcdHelper(server.Client, codec, key)
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obj := &storagetesting.TestResource{ObjectMeta: api.ObjectMeta{Name: "foo"}, Value: 1}
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err := helper.GuaranteedUpdate(context.TODO(), key, &storagetesting.TestResource{}, true, storage.SimpleUpdate(func(in runtime.Object) (runtime.Object, error) {
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return obj, nil
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}))
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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// Update an existing node.
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callbackCalled := false
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objUpdate := &storagetesting.TestResource{ObjectMeta: api.ObjectMeta{Name: "foo"}, Value: 2}
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err = helper.GuaranteedUpdate(context.TODO(), key, &storagetesting.TestResource{}, true, storage.SimpleUpdate(func(in runtime.Object) (runtime.Object, error) {
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callbackCalled = true
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if in.(*storagetesting.TestResource).Value != 1 {
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t.Errorf("Callback input was not current set value")
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}
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return objUpdate, nil
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}))
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objCheck := &storagetesting.TestResource{}
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err = helper.Get(context.TODO(), key, objCheck, false)
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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if objCheck.Value != 2 {
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t.Errorf("Value should have been 2 but got", objCheck.Value)
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}
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if !callbackCalled {
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t.Errorf("tryUpdate callback should have been called.")
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}
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}
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func TestGuaranteedUpdateNoChange(t *testing.T) {
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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key := etcdtest.AddPrefix("/some/key")
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helper := newEtcdHelper(server.Client, codec, key)
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obj := &storagetesting.TestResource{ObjectMeta: api.ObjectMeta{Name: "foo"}, Value: 1}
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err := helper.GuaranteedUpdate(context.TODO(), key, &storagetesting.TestResource{}, true, storage.SimpleUpdate(func(in runtime.Object) (runtime.Object, error) {
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return obj, nil
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}))
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if err != nil {
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t.Errorf("Unexpected error %#v", err)
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}
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// Update an existing node with the same data
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callbackCalled := false
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objUpdate := &storagetesting.TestResource{ObjectMeta: api.ObjectMeta{Name: "foo"}, Value: 1}
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err = helper.GuaranteedUpdate(context.TODO(), key, &storagetesting.TestResource{}, true, storage.SimpleUpdate(func(in runtime.Object) (runtime.Object, error) {
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callbackCalled = true
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return objUpdate, nil
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}))
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if err != nil {
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t.Fatalf("Unexpected error %#v", err)
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}
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if !callbackCalled {
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t.Errorf("tryUpdate callback should have been called.")
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}
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}
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func TestGuaranteedUpdateKeyNotFound(t *testing.T) {
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server := etcdtesting.NewEtcdTestClientServer(t)
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defer server.Terminate(t)
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key := etcdtest.AddPrefix("/some/key")
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helper := newEtcdHelper(server.Client, codec, key)
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// Create a new node.
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obj := &storagetesting.TestResource{ObjectMeta: api.ObjectMeta{Name: "foo"}, Value: 1}
|
|
|
|
f := storage.SimpleUpdate(func(in runtime.Object) (runtime.Object, error) {
|
|
return obj, nil
|
|
})
|
|
|
|
ignoreNotFound := false
|
|
err := helper.GuaranteedUpdate(context.TODO(), key, &storagetesting.TestResource{}, ignoreNotFound, f)
|
|
if err == nil {
|
|
t.Errorf("Expected error for key not found.")
|
|
}
|
|
|
|
ignoreNotFound = true
|
|
err = helper.GuaranteedUpdate(context.TODO(), key, &storagetesting.TestResource{}, ignoreNotFound, f)
|
|
if err != nil {
|
|
t.Errorf("Unexpected error %v.", err)
|
|
}
|
|
}
|
|
|
|
func TestGuaranteedUpdate_CreateCollision(t *testing.T) {
|
|
server := etcdtesting.NewEtcdTestClientServer(t)
|
|
defer server.Terminate(t)
|
|
key := etcdtest.AddPrefix("/some/key")
|
|
helper := newEtcdHelper(server.Client, codec, etcdtest.PathPrefix())
|
|
|
|
const concurrency = 10
|
|
var wgDone sync.WaitGroup
|
|
var wgForceCollision sync.WaitGroup
|
|
wgDone.Add(concurrency)
|
|
wgForceCollision.Add(concurrency)
|
|
|
|
for i := 0; i < concurrency; i++ {
|
|
// Increment storagetesting.TestResource.Value by 1
|
|
go func() {
|
|
defer wgDone.Done()
|
|
|
|
firstCall := true
|
|
err := helper.GuaranteedUpdate(context.TODO(), key, &storagetesting.TestResource{}, true, storage.SimpleUpdate(func(in runtime.Object) (runtime.Object, error) {
|
|
defer func() { firstCall = false }()
|
|
|
|
if firstCall {
|
|
// Force collision by joining all concurrent GuaranteedUpdate operations here.
|
|
wgForceCollision.Done()
|
|
wgForceCollision.Wait()
|
|
}
|
|
|
|
currValue := in.(*storagetesting.TestResource).Value
|
|
obj := &storagetesting.TestResource{ObjectMeta: api.ObjectMeta{Name: "foo"}, Value: currValue + 1}
|
|
return obj, nil
|
|
}))
|
|
if err != nil {
|
|
t.Errorf("Unexpected error %#v", err)
|
|
}
|
|
}()
|
|
}
|
|
wgDone.Wait()
|
|
|
|
stored := &storagetesting.TestResource{}
|
|
err := helper.Get(context.TODO(), key, stored, false)
|
|
if err != nil {
|
|
t.Errorf("Unexpected error %#v", stored)
|
|
}
|
|
if stored.Value != concurrency {
|
|
t.Errorf("Some of the writes were lost. Stored value: %d", stored.Value)
|
|
}
|
|
}
|
|
|
|
func TestGetEtcdVersion_ValidVersion(t *testing.T) {
|
|
testServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
fmt.Fprint(w, validEtcdVersion)
|
|
}))
|
|
defer testServer.Close()
|
|
|
|
var version string
|
|
var err error
|
|
if version, err = GetEtcdVersion(testServer.URL); err != nil {
|
|
t.Errorf("Unexpected error: %v", err)
|
|
}
|
|
assert.Equal(t, validEtcdVersion, version, "Unexpected version")
|
|
assert.Nil(t, err)
|
|
}
|
|
|
|
func TestGetEtcdVersion_ErrorStatus(t *testing.T) {
|
|
testServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
w.WriteHeader(http.StatusServiceUnavailable)
|
|
}))
|
|
defer testServer.Close()
|
|
|
|
_, err := GetEtcdVersion(testServer.URL)
|
|
assert.NotNil(t, err)
|
|
}
|
|
|
|
func TestGetEtcdVersion_NotListening(t *testing.T) {
|
|
portIsOpen := func(port int) bool {
|
|
conn, err := net.DialTimeout("tcp", "127.0.0.1:"+strconv.Itoa(port), 1*time.Second)
|
|
if err == nil {
|
|
conn.Close()
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
port := rand.Intn((1 << 16) - 1)
|
|
for tried := 0; portIsOpen(port); tried++ {
|
|
if tried >= 10 {
|
|
t.Fatal("Couldn't find a closed TCP port to continue testing")
|
|
}
|
|
port++
|
|
}
|
|
|
|
_, err := GetEtcdVersion("http://127.0.0.1:" + strconv.Itoa(port))
|
|
assert.NotNil(t, err)
|
|
}
|
|
|
|
func TestPrefixEtcdKey(t *testing.T) {
|
|
server := etcdtesting.NewEtcdTestClientServer(t)
|
|
defer server.Terminate(t)
|
|
prefix := path.Join("/", etcdtest.PathPrefix())
|
|
helper := newEtcdHelper(server.Client, testapi.Default.Codec(), prefix)
|
|
|
|
baseKey := "/some/key"
|
|
|
|
// Verify prefix is added
|
|
keyBefore := baseKey
|
|
keyAfter := helper.prefixEtcdKey(keyBefore)
|
|
|
|
assert.Equal(t, keyAfter, path.Join(prefix, baseKey), "Prefix incorrectly added by EtcdHelper")
|
|
|
|
// Verify prefix is not added
|
|
keyBefore = path.Join(prefix, baseKey)
|
|
keyAfter = helper.prefixEtcdKey(keyBefore)
|
|
|
|
assert.Equal(t, keyBefore, keyAfter, "Prefix incorrectly added by EtcdHelper")
|
|
}
|
|
|
|
func TestEtcdHealthCheck(t *testing.T) {
|
|
tests := []struct {
|
|
data string
|
|
expectErr bool
|
|
}{
|
|
{
|
|
data: "{\"health\": \"true\"}",
|
|
expectErr: false,
|
|
},
|
|
{
|
|
data: "{\"health\": \"false\"}",
|
|
expectErr: true,
|
|
},
|
|
{
|
|
data: "invalid json",
|
|
expectErr: true,
|
|
},
|
|
}
|
|
for _, test := range tests {
|
|
err := EtcdHealthCheck([]byte(test.data))
|
|
if err != nil && !test.expectErr {
|
|
t.Errorf("unexpected error: %v", err)
|
|
}
|
|
if err == nil && test.expectErr {
|
|
t.Error("unexpected non-error")
|
|
}
|
|
}
|
|
}
|