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/**
* Standalone signaling server for the Nextcloud Spreed app.
* Copyright (C) 2018 struktur AG
*
* @author Joachim Bauch <bauch@struktur.de>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package signaling
import (
"bytes"
"context"
"runtime"
"sync/atomic"
"testing"
"time"
"github.com/nats-io/nats.go"
)
func (c *LoopbackNatsClient) waitForSubscriptionsEmpty(ctx context.Context, t *testing.T) {
for {
c.mu.Lock()
count := len(c.subscriptions)
c.mu.Unlock()
if count == 0 {
break
}
select {
case <-ctx.Done():
c.mu.Lock()
t.Errorf("Error waiting for subscriptions %+v to terminate: %s", c.subscriptions, ctx.Err())
c.mu.Unlock()
return
default:
time.Sleep(time.Millisecond)
}
}
}
func CreateLoopbackNatsClientForTest(t *testing.T) NatsClient {
result, err := NewLoopbackNatsClient()
if err != nil {
t.Fatal(err)
}
return result
}
func TestLoopbackNatsClient_Subscribe(t *testing.T) {
// Give time for things to settle before capturing the number of
// go routines
time.Sleep(500 * time.Millisecond)
base := runtime.NumGoroutine()
client := CreateLoopbackNatsClientForTest(t)
dest := make(chan *nats.Msg)
sub, err := client.Subscribe("foo", dest)
if err != nil {
t.Fatal(err)
}
ch := make(chan bool)
received := int32(0)
max := int32(20)
quit := make(chan bool)
go func() {
for {
select {
case <-dest:
total := atomic.AddInt32(&received, 1)
if total == max {
err := sub.Unsubscribe()
if err != nil {
t.Errorf("Unsubscribe failed with err: %s", err)
return
}
ch <- true
}
case <-quit:
return
}
}
}()
for i := int32(0); i < max; i++ {
if err := client.Publish("foo", []byte("hello")); err != nil {
t.Error(err)
}
}
<-ch
r := atomic.LoadInt32(&received)
if r != max {
t.Fatalf("Received wrong # of messages: %d vs %d", r, max)
}
quit <- true
// Give time for things to settle before capturing the number of
// go routines
time.Sleep(500 * time.Millisecond)
delta := (runtime.NumGoroutine() - base)
if delta > 0 {
t.Fatalf("%d Go routines still exist post Close()", delta)
}
}
func TestLoopbackNatsClient_Request(t *testing.T) {
// Give time for things to settle before capturing the number of
// go routines
time.Sleep(500 * time.Millisecond)
base := runtime.NumGoroutine()
client := CreateLoopbackNatsClientForTest(t)
dest := make(chan *nats.Msg)
sub, err := client.Subscribe("foo", dest)
if err != nil {
t.Fatal(err)
}
go func() {
msg := <-dest
if err := client.Publish(msg.Reply, []byte("world")); err != nil {
t.Error(err)
return
}
if err := sub.Unsubscribe(); err != nil {
t.Error("Unsubscribe failed with err:", err)
return
}
}()
reply, err := client.Request("foo", []byte("hello"), 1*time.Second)
if err != nil {
t.Fatal(err)
}
var response []byte
if err := client.Decode(reply, &response); err != nil {
t.Fatal(err)
}
if !bytes.Equal(response, []byte("world")) {
t.Fatalf("expected 'world', got '%s'", string(reply.Data))
}
// Give time for things to settle before capturing the number of
// go routines
time.Sleep(500 * time.Millisecond)
delta := (runtime.NumGoroutine() - base)
if delta > 0 {
t.Fatalf("%d Go routines still exist post Close()", delta)
}
}
func TestLoopbackNatsClient_RequestTimeout(t *testing.T) {
// Give time for things to settle before capturing the number of
// go routines
time.Sleep(500 * time.Millisecond)
base := runtime.NumGoroutine()
client := CreateLoopbackNatsClientForTest(t)
dest := make(chan *nats.Msg)
sub, err := client.Subscribe("foo", dest)
if err != nil {
t.Fatal(err)
}
go func() {
msg := <-dest
time.Sleep(200 * time.Millisecond)
if err := client.Publish(msg.Reply, []byte("world")); err != nil {
t.Error(err)
return
}
if err := sub.Unsubscribe(); err != nil {
t.Error("Unsubscribe failed with err:", err)
return
}
}()
reply, err := client.Request("foo", []byte("hello"), 100*time.Millisecond)
if err == nil {
t.Fatalf("Request should have timed out, reeived %+v", reply)
} else if err != nats.ErrTimeout {
t.Fatalf("Request should have timed out, received error %s", err)
}
// Give time for things to settle before capturing the number of
// go routines
time.Sleep(500 * time.Millisecond)
delta := (runtime.NumGoroutine() - base)
if delta > 0 {
t.Fatalf("%d Go routines still exist post Close()", delta)
}
}
func TestLoopbackNatsClient_RequestTimeoutNoReply(t *testing.T) {
client := CreateLoopbackNatsClientForTest(t)
timeout := 100 * time.Millisecond
start := time.Now()
reply, err := client.Request("foo", []byte("hello"), timeout)
end := time.Now()
if err == nil {
t.Fatalf("Request should have timed out, reeived %+v", reply)
} else if err != nats.ErrTimeout {
t.Fatalf("Request should have timed out, received error %s", err)
}
if end.Sub(start) < timeout {
t.Errorf("Expected a delay of %s but had %s", timeout, end.Sub(start))
}
}