/*
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Copyright 2015 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 framework
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import (
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"sync"
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"testing"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/watch"
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)
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// ensure the watch delivers the requested and only the requested items.
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func consume(t *testing.T, w watch.Interface, rvs []string, done *sync.WaitGroup) {
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defer done.Done()
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for _, rv := range rvs {
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got, ok := <-w.ResultChan()
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if !ok {
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t.Errorf("%#v: unexpected channel close, wanted %v", rvs, rv)
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return
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}
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gotRV := got.Object.(*v1.Pod).ObjectMeta.ResourceVersion
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if e, a := rv, gotRV; e != a {
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t.Errorf("wanted %v, got %v", e, a)
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} else {
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t.Logf("Got %v as expected", gotRV)
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}
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}
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// We should not get anything else.
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got, open := <-w.ResultChan()
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if open {
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t.Errorf("%#v: unwanted object %#v", rvs, got)
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}
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}
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func TestRCNumber(t *testing.T) {
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pod := func(name string) *v1.Pod {
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return &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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},
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}
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}
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wg := &sync.WaitGroup{}
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wg.Add(3)
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source := NewFakeControllerSource()
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source.Add(pod("foo"))
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source.Modify(pod("foo"))
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source.Modify(pod("foo"))
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w, err := source.Watch(metav1.ListOptions{ResourceVersion: "1"})
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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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go consume(t, w, []string{"2", "3"}, wg)
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list, err := source.List(metav1.ListOptions{})
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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 e, a := "3", list.(*v1.List).ResourceVersion; e != a {
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t.Errorf("wanted %v, got %v", e, a)
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}
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w2, err := source.Watch(metav1.ListOptions{ResourceVersion: "2"})
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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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go consume(t, w2, []string{"3"}, wg)
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w3, err := source.Watch(metav1.ListOptions{ResourceVersion: "3"})
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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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go consume(t, w3, []string{}, wg)
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source.Shutdown()
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wg.Wait()
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}
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// TestResetWatch validates that the FakeController correctly mocks a watch
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// falling behind and ResourceVersions aging out.
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func TestResetWatch(t *testing.T) {
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pod := func(name string) *v1.Pod {
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return &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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},
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}
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}
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wg := &sync.WaitGroup{}
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wg.Add(1)
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source := NewFakeControllerSource()
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source.Add(pod("foo")) // RV = 1
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source.Modify(pod("foo")) // RV = 2
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source.Modify(pod("foo")) // RV = 3
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// Kill watch, delete change history
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source.ResetWatch()
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// This should fail, RV=1 was lost with ResetWatch
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_, err := source.Watch(metav1.ListOptions{ResourceVersion: "1"})
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if err == nil {
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t.Fatalf("Unexpected non-error")
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}
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// This should succeed, RV=3 is current
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w, err := source.Watch(metav1.ListOptions{ResourceVersion: "3"})
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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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// Modify again, ensure the watch is still working
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source.Modify(pod("foo"))
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go consume(t, w, []string{"4"}, wg)
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source.Shutdown()
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wg.Wait()
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}
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