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package dnstapio
import (
"bytes"
"sync"
"testing"
"time"
tap "github.com/dnstap/golang-dnstap"
)
type buf struct {
*bytes.Buffer
cost time.Duration
}
func (b buf) Write(frame []byte) (int, error) {
time.Sleep(b.cost)
return b.Buffer.Write(frame)
}
func (b buf) Close() error {
return nil
}
func TestRace(t *testing.T) {
b := buf{&bytes.Buffer{}, 100 * time.Millisecond}
dio := New(b)
wg := &sync.WaitGroup{}
wg.Add(10)
for i := 0; i < 10; i++ {
timeout := time.After(time.Second)
go func() {
for {
select {
case <-timeout:
wg.Done()
return
default:
time.Sleep(50 * time.Millisecond)
dio.Dnstap(tap.Dnstap{})
}
}
}()
}
wg.Wait()
}
func TestClose(t *testing.T) {
done := make(chan bool)
var dio *DnstapIO
go func() {
b := buf{&bytes.Buffer{}, 0}
dio = New(b)
dio.Close()
close(done)
}()
select {
case <-done:
case <-time.After(time.Second):
t.Fatal("Not closing.")
}
func() {
defer func() {
if err := recover(); err == nil {
t.Fatal("Send on closed channel.")
}
}()
dio.Dnstap(tap.Dnstap{})
}()
}
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