mirror of
https://github.com/kubernetes/client-go.git
synced 2025-12-02 11:05:30 +00:00
375 lines
11 KiB
Go
375 lines
11 KiB
Go
/*
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Copyright 2024 The Kubernetes Authors.
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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 rest
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import (
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"context"
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"fmt"
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"regexp"
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"testing"
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"github.com/google/go-cmp/cmp"
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v1 "k8s.io/api/core/v1"
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apiequality "k8s.io/apimachinery/pkg/api/equality"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/watch"
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clientfeatures "k8s.io/client-go/features"
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clientfeaturestesting "k8s.io/client-go/features/testing"
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)
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func TestWatchListResult(t *testing.T) {
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scenarios := []struct {
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name string
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target WatchListResult
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result runtime.Object
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expectedResult *v1.PodList
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expectedErr error
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}{
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{
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name: "not a pointer",
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result: fakeObj{},
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expectedErr: fmt.Errorf("rest.fakeObj is not a list: expected pointer, but got rest.fakeObj type"),
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},
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{
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name: "nil input won't panic",
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result: nil,
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expectedErr: fmt.Errorf("<nil> is not a list: expected pointer, but got invalid kind"),
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},
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{
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name: "not a list",
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result: &v1.Pod{},
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expectedErr: fmt.Errorf("*v1.Pod is not a list: no Items field in this object"),
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},
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{
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name: "an err is always returned",
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result: nil,
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target: WatchListResult{err: fmt.Errorf("dummy err")},
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expectedErr: fmt.Errorf("dummy err"),
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},
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{
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name: "empty list",
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result: &v1.PodList{},
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expectedResult: &v1.PodList{
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TypeMeta: metav1.TypeMeta{Kind: "PodList"},
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Items: []v1.Pod{},
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},
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},
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{
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name: "gv is applied",
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result: &v1.PodList{},
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target: WatchListResult{gv: schema.GroupVersion{Group: "g", Version: "v"}},
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expectedResult: &v1.PodList{
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TypeMeta: metav1.TypeMeta{Kind: "PodList", APIVersion: "g/v"},
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Items: []v1.Pod{},
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},
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},
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{
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name: "gv is applied, empty group",
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result: &v1.PodList{},
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target: WatchListResult{gv: schema.GroupVersion{Version: "v"}},
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expectedResult: &v1.PodList{
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TypeMeta: metav1.TypeMeta{Kind: "PodList", APIVersion: "v"},
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Items: []v1.Pod{},
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},
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},
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{
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name: "rv is applied",
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result: &v1.PodList{},
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target: WatchListResult{initialEventsEndBookmarkRV: "100"},
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expectedResult: &v1.PodList{
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TypeMeta: metav1.TypeMeta{Kind: "PodList"},
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ListMeta: metav1.ListMeta{ResourceVersion: "100"},
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Items: []v1.Pod{},
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},
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},
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{
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name: "items are applied",
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result: &v1.PodList{},
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target: WatchListResult{items: []runtime.Object{makePod(1), makePod(2)}},
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expectedResult: &v1.PodList{
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TypeMeta: metav1.TypeMeta{Kind: "PodList"},
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Items: []v1.Pod{*makePod(1), *makePod(2)},
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},
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},
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{
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name: "type mismatch",
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result: &v1.PodList{},
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target: WatchListResult{items: []runtime.Object{makeNamespace("1")}},
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expectedErr: fmt.Errorf("received object type = v1.Namespace at index = 0, doesn't match the list item type = v1.Pod"),
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},
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}
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for _, scenario := range scenarios {
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t.Run(scenario.name, func(t *testing.T) {
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err := scenario.target.Into(scenario.result)
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if scenario.expectedErr != nil && err == nil {
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t.Fatalf("expected an error = %v, got nil", scenario.expectedErr)
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}
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if scenario.expectedErr == nil && err != nil {
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t.Fatalf("didn't expect an error, got = %v", err)
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}
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if err != nil {
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if scenario.expectedErr.Error() != err.Error() {
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t.Fatalf("unexpected err = %v, expected = %v", err, scenario.expectedErr)
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}
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return
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}
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if !apiequality.Semantic.DeepEqual(scenario.expectedResult, scenario.result) {
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t.Errorf("diff: %v", cmp.Diff(scenario.expectedResult, scenario.result))
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}
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})
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}
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}
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func TestWatchListSuccess(t *testing.T) {
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scenarios := []struct {
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name string
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gv schema.GroupVersion
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watchEvents []watch.Event
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expectedResult *v1.PodList
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}{
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{
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name: "happy path",
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// Note that the APIVersion for the core API group is "v1" (not "core/v1").
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// We fake "core/v1" here to test if the Group part is properly
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// recognized and set on the resulting object.
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gv: schema.GroupVersion{Group: "core", Version: "v1"},
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watchEvents: []watch.Event{
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{Type: watch.Added, Object: makePod(1)},
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{Type: watch.Added, Object: makePod(2)},
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{Type: watch.Bookmark, Object: makeBookmarkEvent(5)},
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},
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expectedResult: &v1.PodList{
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TypeMeta: metav1.TypeMeta{
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APIVersion: "core/v1",
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Kind: "PodList",
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},
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ListMeta: metav1.ListMeta{ResourceVersion: "5"},
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Items: []v1.Pod{*makePod(1), *makePod(2)},
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},
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},
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{
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name: "APIVersion with only version provided is properly set",
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gv: schema.GroupVersion{Version: "v1"},
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watchEvents: []watch.Event{
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{Type: watch.Added, Object: makePod(1)},
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{Type: watch.Bookmark, Object: makeBookmarkEvent(5)},
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},
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expectedResult: &v1.PodList{
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TypeMeta: metav1.TypeMeta{
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APIVersion: "v1",
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Kind: "PodList",
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},
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ListMeta: metav1.ListMeta{ResourceVersion: "5"},
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Items: []v1.Pod{*makePod(1)},
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},
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},
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{
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name: "only the bookmark",
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gv: schema.GroupVersion{Version: "v1"},
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watchEvents: []watch.Event{
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{Type: watch.Bookmark, Object: makeBookmarkEvent(5)},
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},
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expectedResult: &v1.PodList{
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TypeMeta: metav1.TypeMeta{
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APIVersion: "v1",
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Kind: "PodList",
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},
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ListMeta: metav1.ListMeta{ResourceVersion: "5"},
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Items: []v1.Pod{},
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},
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},
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}
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for _, scenario := range scenarios {
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t.Run(scenario.name, func(t *testing.T) {
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ctx := context.Background()
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fakeWatcher := watch.NewFake()
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target := &Request{
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c: &RESTClient{
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content: ClientContentConfig{
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GroupVersion: scenario.gv,
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},
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},
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}
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go func(watchEvents []watch.Event) {
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for _, watchEvent := range watchEvents {
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fakeWatcher.Action(watchEvent.Type, watchEvent.Object)
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}
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}(scenario.watchEvents)
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res := target.handleWatchList(ctx, fakeWatcher)
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if res.err != nil {
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t.Fatal(res.err)
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}
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result := &v1.PodList{}
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if err := res.Into(result); err != nil {
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t.Fatal(err)
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}
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if !apiequality.Semantic.DeepEqual(scenario.expectedResult, result) {
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t.Errorf("diff: %v", cmp.Diff(scenario.expectedResult, result))
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}
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if !fakeWatcher.IsStopped() {
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t.Fatalf("the watcher wasn't stopped")
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}
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})
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}
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}
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func TestWatchListFailure(t *testing.T) {
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scenarios := []struct {
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name string
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ctx context.Context
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watcher *watch.FakeWatcher
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watchEvents []watch.Event
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expectedError error
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}{
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{
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name: "request stop",
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ctx: func() context.Context {
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ctx, ctxCancel := context.WithCancel(context.TODO())
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ctxCancel()
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return ctx
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}(),
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watcher: watch.NewFake(),
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expectedError: fmt.Errorf("context canceled"),
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},
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{
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name: "stop watcher",
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ctx: context.TODO(),
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watcher: func() *watch.FakeWatcher {
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w := watch.NewFake()
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w.Stop()
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return w
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}(),
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expectedError: fmt.Errorf("unexpected watch close"),
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},
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{
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name: "stop on watch.Error",
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ctx: context.TODO(),
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watcher: watch.NewFake(),
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watchEvents: []watch.Event{{Type: watch.Error, Object: &apierrors.NewInternalError(fmt.Errorf("dummy errror")).ErrStatus}},
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expectedError: fmt.Errorf("Internal error occurred: dummy errror"),
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},
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{
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name: "incorrect watch type (Deleted)",
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ctx: context.TODO(),
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watcher: watch.NewFake(),
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watchEvents: []watch.Event{{Type: watch.Deleted, Object: makePod(1)}},
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expectedError: fmt.Errorf("unexpected watch event .*, expected to only receive watch.Added and watch.Bookmark events"),
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},
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{
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name: "incorrect watch type (Modified)",
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ctx: context.TODO(),
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watcher: watch.NewFake(),
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watchEvents: []watch.Event{{Type: watch.Modified, Object: makePod(1)}},
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expectedError: fmt.Errorf("unexpected watch event .*, expected to only receive watch.Added and watch.Bookmark events"),
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},
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{
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name: "unordered input returns an error",
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ctx: context.TODO(),
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watcher: watch.NewFake(),
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watchEvents: []watch.Event{{Type: watch.Added, Object: makePod(3)}, {Type: watch.Added, Object: makePod(1)}},
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expectedError: fmt.Errorf("cannot add the obj .* with the key = ns/pod-1, as it violates the ordering guarantees provided by the watchlist feature in beta phase, lastInsertedKey was = ns/pod-3"),
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},
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}
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for _, scenario := range scenarios {
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t.Run(scenario.name, func(t *testing.T) {
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target := &Request{}
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go func(w *watch.FakeWatcher, watchEvents []watch.Event) {
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for _, event := range watchEvents {
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w.Action(event.Type, event.Object)
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}
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}(scenario.watcher, scenario.watchEvents)
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res := target.handleWatchList(scenario.ctx, scenario.watcher)
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resErr := res.Into(nil)
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if resErr == nil {
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t.Fatal("expected to get an error, got nil")
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}
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matched, err := regexp.MatchString(scenario.expectedError.Error(), resErr.Error())
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if err != nil {
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t.Fatal(err)
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}
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if !matched {
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t.Fatalf("unexpected err = %v, expected = %v", resErr, scenario.expectedError)
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}
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if !scenario.watcher.IsStopped() {
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t.Fatalf("the watcher wasn't stopped")
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}
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})
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}
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}
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func TestWatchListWhenFeatureGateDisabled(t *testing.T) {
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clientfeaturestesting.SetFeatureDuringTest(t, clientfeatures.WatchListClient, false)
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expectedError := fmt.Errorf("%q feature gate is not enabled", clientfeatures.WatchListClient)
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target := &Request{}
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res := target.WatchList(context.TODO())
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resErr := res.Into(nil)
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if resErr == nil {
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t.Fatal("expected to get an error, got nil")
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}
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if resErr.Error() != expectedError.Error() {
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t.Fatalf("unexpected error: %v, expected: %v", resErr, expectedError)
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}
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}
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func makePod(rv uint64) *v1.Pod {
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return &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: fmt.Sprintf("pod-%d", rv),
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Namespace: "ns",
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ResourceVersion: fmt.Sprintf("%d", rv),
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Annotations: map[string]string{},
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},
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}
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}
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func makeNamespace(name string) *v1.Namespace {
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return &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: name}}
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}
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func makeBookmarkEvent(rv uint64) *v1.Pod {
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return &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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ResourceVersion: fmt.Sprintf("%d", rv),
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Annotations: map[string]string{metav1.InitialEventsAnnotationKey: "true"},
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},
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}
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}
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type fakeObj struct {
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}
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func (f fakeObj) GetObjectKind() schema.ObjectKind {
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return schema.EmptyObjectKind
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}
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func (f fakeObj) DeepCopyObject() runtime.Object {
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return fakeObj{}
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}
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