sleep some time for send mail

@@ -2,10 +2,12 @@ package logs
 
 import (
 	"testing"
+	"time"
 )
 
 func TestSmtp(t *testing.T) {
 	log := NewLogger(10000)
 	log.SetLogger("smtp", `{"username":"beegotest@gmail.com","password":"xxxxxxxx","host":"smtp.gmail.com:587","sendTos":["xiemengjun@gmail.com"]}`)
 	log.Critical("sendmail critical")
+	time.Sleep(time.Second * 30)
 }