254 lines
6.9 KiB
Go
254 lines
6.9 KiB
Go
/*
|
|
Copyright 2022 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 cacher
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"sync"
|
|
"testing"
|
|
"time"
|
|
|
|
testingclock "k8s.io/utils/clock/testing"
|
|
)
|
|
|
|
func Test_newReady(t *testing.T) {
|
|
errCh := make(chan error, 10)
|
|
ready := newReady(testingclock.NewFakeClock(time.Now()))
|
|
ready.setError(nil)
|
|
// create 10 goroutines waiting for ready
|
|
for i := 0; i < 10; i++ {
|
|
go func() {
|
|
errCh <- ready.wait(context.Background())
|
|
}()
|
|
}
|
|
select {
|
|
case <-time.After(1 * time.Second):
|
|
case <-errCh:
|
|
t.Errorf("ready should be blocking")
|
|
}
|
|
ready.setReady()
|
|
for i := 0; i < 10; i++ {
|
|
if err := <-errCh; err != nil {
|
|
t.Errorf("unexpected error on channel %d", i)
|
|
}
|
|
}
|
|
}
|
|
|
|
func Test_newReadySetIdempotent(t *testing.T) {
|
|
errCh := make(chan error, 10)
|
|
ready := newReady(testingclock.NewFakeClock(time.Now()))
|
|
ready.setError(nil)
|
|
ready.setError(nil)
|
|
ready.setError(nil)
|
|
if generation, _, err := ready.checkAndReadGeneration(); generation != 0 || err == nil {
|
|
t.Errorf("unexpected state: generation=%v ready=%v", generation, err)
|
|
}
|
|
ready.setReady()
|
|
if generation, _, err := ready.checkAndReadGeneration(); generation != 1 || err != nil {
|
|
t.Errorf("unexpected state: generation=%v ready=%v", generation, err)
|
|
}
|
|
ready.setReady()
|
|
ready.setReady()
|
|
if generation, _, err := ready.checkAndReadGeneration(); generation != 1 || err != nil {
|
|
t.Errorf("unexpected state: generation=%v ready=%v", generation, err)
|
|
}
|
|
ready.setError(nil)
|
|
// create 10 goroutines waiting for ready and stop
|
|
for i := 0; i < 10; i++ {
|
|
go func() {
|
|
errCh <- ready.wait(context.Background())
|
|
}()
|
|
}
|
|
select {
|
|
case <-time.After(1 * time.Second):
|
|
case <-errCh:
|
|
t.Errorf("ready should be blocking")
|
|
}
|
|
ready.setReady()
|
|
if generation, _, err := ready.checkAndReadGeneration(); generation != 2 || err != nil {
|
|
t.Errorf("unexpected state: generation=%v ready=%v", generation, err)
|
|
}
|
|
for i := 0; i < 10; i++ {
|
|
if err := <-errCh; err != nil {
|
|
t.Errorf("unexpected error on channel %d", i)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Test_newReadyRacy executes all the possible transitions randomly.
|
|
// It must run with the race detector enabled.
|
|
func Test_newReadyRacy(t *testing.T) {
|
|
concurrency := 1000
|
|
errCh := make(chan error, concurrency)
|
|
ready := newReady(testingclock.NewFakeClock(time.Now()))
|
|
ready.setError(nil)
|
|
|
|
wg := sync.WaitGroup{}
|
|
wg.Add(2 * concurrency)
|
|
for i := 0; i < concurrency; i++ {
|
|
go func() {
|
|
errCh <- ready.wait(context.Background())
|
|
}()
|
|
go func() {
|
|
defer wg.Done()
|
|
ready.setError(nil)
|
|
}()
|
|
go func() {
|
|
defer wg.Done()
|
|
ready.setReady()
|
|
}()
|
|
}
|
|
// Last one has to be set to true.
|
|
wg.Wait()
|
|
ready.setReady()
|
|
|
|
for i := 0; i < concurrency; i++ {
|
|
if err := <-errCh; err != nil {
|
|
t.Errorf("unexpected error %v on channel %d", err, i)
|
|
}
|
|
}
|
|
}
|
|
|
|
func Test_newReadyStop(t *testing.T) {
|
|
errCh := make(chan error, 10)
|
|
ready := newReady(testingclock.NewFakeClock(time.Now()))
|
|
ready.setError(nil)
|
|
// create 10 goroutines waiting for ready and stop
|
|
for i := 0; i < 10; i++ {
|
|
go func() {
|
|
errCh <- ready.wait(context.Background())
|
|
}()
|
|
}
|
|
select {
|
|
case <-time.After(1 * time.Second):
|
|
case <-errCh:
|
|
t.Errorf("ready should be blocking")
|
|
}
|
|
ready.stop()
|
|
for i := 0; i < 10; i++ {
|
|
if err := <-errCh; err == nil {
|
|
t.Errorf("unexpected success on channel %d", i)
|
|
}
|
|
}
|
|
}
|
|
|
|
func Test_newReadyCheck(t *testing.T) {
|
|
ready := newReady(testingclock.NewFakeClock(time.Now()))
|
|
// it starts as false
|
|
if _, err := ready.check(); err == nil {
|
|
t.Errorf("unexpected ready state %v", err)
|
|
}
|
|
ready.setReady()
|
|
if _, err := ready.check(); err != nil {
|
|
t.Errorf("unexpected ready state %v", err)
|
|
}
|
|
// stop sets ready to false
|
|
ready.stop()
|
|
if _, err := ready.check(); err == nil {
|
|
t.Errorf("unexpected ready state %v", err)
|
|
}
|
|
// can not set to true if is stopped
|
|
ready.setReady()
|
|
if _, err := ready.check(); err == nil {
|
|
t.Errorf("unexpected ready state %v", err)
|
|
}
|
|
err := ready.wait(context.Background())
|
|
if err == nil {
|
|
t.Errorf("expected error waiting on a stopped state")
|
|
}
|
|
}
|
|
|
|
func Test_newReadyCancelPending(t *testing.T) {
|
|
errCh := make(chan error, 10)
|
|
ready := newReady(testingclock.NewFakeClock(time.Now()))
|
|
ready.setError(nil)
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
// create 10 goroutines stuck on pending
|
|
for i := 0; i < 10; i++ {
|
|
go func() {
|
|
errCh <- ready.wait(ctx)
|
|
}()
|
|
}
|
|
select {
|
|
case <-time.After(1 * time.Second):
|
|
case <-errCh:
|
|
t.Errorf("ready should be blocking")
|
|
}
|
|
cancel()
|
|
for i := 0; i < 10; i++ {
|
|
if err := <-errCh; err == nil {
|
|
t.Errorf("unexpected success on channel %d", i)
|
|
}
|
|
}
|
|
}
|
|
|
|
func Test_newReadyStateChangeTimestamp(t *testing.T) {
|
|
fakeClock := testingclock.NewFakeClock(time.Now())
|
|
fakeClock.SetTime(time.Now())
|
|
|
|
ready := newReady(fakeClock)
|
|
fakeClock.Step(time.Minute)
|
|
checkReadyTransitionTime(t, ready, time.Minute)
|
|
|
|
ready.setReady()
|
|
fakeClock.Step(time.Minute)
|
|
checkReadyTransitionTime(t, ready, time.Minute)
|
|
fakeClock.Step(time.Minute)
|
|
checkReadyTransitionTime(t, ready, 2*time.Minute)
|
|
|
|
ready.setError(nil)
|
|
fakeClock.Step(time.Minute)
|
|
checkReadyTransitionTime(t, ready, time.Minute)
|
|
fakeClock.Step(time.Minute)
|
|
checkReadyTransitionTime(t, ready, 2*time.Minute)
|
|
|
|
ready.setReady()
|
|
fakeClock.Step(time.Minute)
|
|
checkReadyTransitionTime(t, ready, time.Minute)
|
|
|
|
ready.stop()
|
|
fakeClock.Step(time.Minute)
|
|
checkReadyTransitionTime(t, ready, time.Minute)
|
|
fakeClock.Step(time.Minute)
|
|
checkReadyTransitionTime(t, ready, 2*time.Minute)
|
|
}
|
|
|
|
func checkReadyTransitionTime(t *testing.T, r *ready, expectedLastStateChangeDuration time.Duration) {
|
|
if lastStateChangeDuration, _ := r.check(); lastStateChangeDuration != expectedLastStateChangeDuration {
|
|
t.Errorf("unexpected last state change duration: %v, expected: %v", lastStateChangeDuration, expectedLastStateChangeDuration)
|
|
}
|
|
}
|
|
|
|
func TestReadyError(t *testing.T) {
|
|
ready := newReady(testingclock.NewFakeClock(time.Now()))
|
|
_, _, err := ready.checkAndReadGeneration()
|
|
if err == nil || err.Error() != "storage is (re)initializing" {
|
|
t.Errorf("Unexpected error when unready, got %q", err)
|
|
}
|
|
ready.setError(errors.New("etcd is down"))
|
|
_, _, err = ready.checkAndReadGeneration()
|
|
if err == nil || err.Error() != "storage is (re)initializing: etcd is down" {
|
|
t.Errorf("Unexpected error when unready, got %q", err)
|
|
}
|
|
ready.setError(nil)
|
|
_, _, err = ready.checkAndReadGeneration()
|
|
if err == nil || err.Error() != "storage is (re)initializing" {
|
|
t.Errorf("Unexpected error when unready, got %q", err)
|
|
}
|
|
}
|