eventer: add test for concurrent Post/Register
This test reports the race condition when run using "go test -race".
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7c9508ed71
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@ -1,6 +1,10 @@
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package eventer
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import "testing"
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import (
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"math/rand"
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"testing"
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"time"
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)
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func TestChannel(t *testing.T) {
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eventer := New()
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@ -64,3 +68,46 @@ func TestOn(t *testing.T) {
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t.Error("Expected function event with data 'hello world'. Got", data)
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}
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}
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func TestConcurrentUsage(t *testing.T) {
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rand.Seed(time.Now().Unix())
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eventer := New()
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stop := make(chan struct{})
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recv := make(chan int)
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poster := func() {
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for {
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select {
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case <-stop:
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return
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default:
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eventer.Post("test", "hi")
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}
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}
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}
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listener := func(i int) {
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time.Sleep(time.Duration(rand.Intn(99)) * time.Millisecond)
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c := eventer.Register("test")
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// wait for the first event
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<-c
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recv <- i
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// keep receiving to prevent deadlock
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for {
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select {
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case <-stop:
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return
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case <-c:
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}
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}
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}
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nlisteners := 200
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go poster()
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for i := 0; i < nlisteners; i++ {
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go listener(i)
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}
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// wait until everyone has been served
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for i := 0; i < nlisteners; i++ {
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<-recv
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}
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close(stop)
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}
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