mirror of
https://github.com/genuinetools/reg.git
synced 2024-08-21 14:20:23 -04:00
143 lines
2.7 KiB
Go
143 lines
2.7 KiB
Go
package pubsub // import "github.com/docker/docker/pkg/pubsub"
|
|
|
|
import (
|
|
"fmt"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
func TestSendToOneSub(t *testing.T) {
|
|
p := NewPublisher(100*time.Millisecond, 10)
|
|
c := p.Subscribe()
|
|
|
|
p.Publish("hi")
|
|
|
|
msg := <-c
|
|
if msg.(string) != "hi" {
|
|
t.Fatalf("expected message hi but received %v", msg)
|
|
}
|
|
}
|
|
|
|
func TestSendToMultipleSubs(t *testing.T) {
|
|
p := NewPublisher(100*time.Millisecond, 10)
|
|
var subs []chan interface{}
|
|
subs = append(subs, p.Subscribe(), p.Subscribe(), p.Subscribe())
|
|
|
|
p.Publish("hi")
|
|
|
|
for _, c := range subs {
|
|
msg := <-c
|
|
if msg.(string) != "hi" {
|
|
t.Fatalf("expected message hi but received %v", msg)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestEvictOneSub(t *testing.T) {
|
|
p := NewPublisher(100*time.Millisecond, 10)
|
|
s1 := p.Subscribe()
|
|
s2 := p.Subscribe()
|
|
|
|
p.Evict(s1)
|
|
p.Publish("hi")
|
|
if _, ok := <-s1; ok {
|
|
t.Fatal("expected s1 to not receive the published message")
|
|
}
|
|
|
|
msg := <-s2
|
|
if msg.(string) != "hi" {
|
|
t.Fatalf("expected message hi but received %v", msg)
|
|
}
|
|
}
|
|
|
|
func TestClosePublisher(t *testing.T) {
|
|
p := NewPublisher(100*time.Millisecond, 10)
|
|
var subs []chan interface{}
|
|
subs = append(subs, p.Subscribe(), p.Subscribe(), p.Subscribe())
|
|
p.Close()
|
|
|
|
for _, c := range subs {
|
|
if _, ok := <-c; ok {
|
|
t.Fatal("expected all subscriber channels to be closed")
|
|
}
|
|
}
|
|
}
|
|
|
|
const sampleText = "test"
|
|
|
|
type testSubscriber struct {
|
|
dataCh chan interface{}
|
|
ch chan error
|
|
}
|
|
|
|
func (s *testSubscriber) Wait() error {
|
|
return <-s.ch
|
|
}
|
|
|
|
func newTestSubscriber(p *Publisher) *testSubscriber {
|
|
ts := &testSubscriber{
|
|
dataCh: p.Subscribe(),
|
|
ch: make(chan error),
|
|
}
|
|
go func() {
|
|
for data := range ts.dataCh {
|
|
s, ok := data.(string)
|
|
if !ok {
|
|
ts.ch <- fmt.Errorf("Unexpected type %T", data)
|
|
break
|
|
}
|
|
if s != sampleText {
|
|
ts.ch <- fmt.Errorf("Unexpected text %s", s)
|
|
break
|
|
}
|
|
}
|
|
close(ts.ch)
|
|
}()
|
|
return ts
|
|
}
|
|
|
|
// for testing with -race
|
|
func TestPubSubRace(t *testing.T) {
|
|
p := NewPublisher(0, 1024)
|
|
var subs []*testSubscriber
|
|
for j := 0; j < 50; j++ {
|
|
subs = append(subs, newTestSubscriber(p))
|
|
}
|
|
for j := 0; j < 1000; j++ {
|
|
p.Publish(sampleText)
|
|
}
|
|
time.AfterFunc(1*time.Second, func() {
|
|
for _, s := range subs {
|
|
p.Evict(s.dataCh)
|
|
}
|
|
})
|
|
for _, s := range subs {
|
|
s.Wait()
|
|
}
|
|
}
|
|
|
|
func BenchmarkPubSub(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
b.StopTimer()
|
|
p := NewPublisher(0, 1024)
|
|
var subs []*testSubscriber
|
|
for j := 0; j < 50; j++ {
|
|
subs = append(subs, newTestSubscriber(p))
|
|
}
|
|
b.StartTimer()
|
|
for j := 0; j < 1000; j++ {
|
|
p.Publish(sampleText)
|
|
}
|
|
time.AfterFunc(1*time.Second, func() {
|
|
for _, s := range subs {
|
|
p.Evict(s.dataCh)
|
|
}
|
|
})
|
|
for _, s := range subs {
|
|
if err := s.Wait(); err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
}
|
|
}
|
|
}
|