added router benchmark

message/router_test.go

@@ -2,6 +2,7 @@ package message_test
 
 import (
 	"fmt"
+	"sync"
 	"testing"
 	"time"
 
@@ -154,6 +155,125 @@ func TestRouter_functional_nack(t *testing.T) {
 	tests.AssertAllMessagesReceived(t, []*message.Message{publishedMsg, publishedMsg}, messages)
 }
 
+type benchMockSubscriber struct {
+	messagesToSend []*message.Message
+}
+
+func (m benchMockSubscriber) Subscribe(topic string) (chan *message.Message, error) {
+	out := make(chan *message.Message)
+
+	go func() {
+		for _, msg := range m.messagesToSend {
+			out <- msg
+			<-msg.Acked()
+		}
+
+		close(out)
+	}()
+
+	return out, nil
+}
+
+func (benchMockSubscriber) Close() error {
+	return nil
+}
+
+type nopPublisher struct {
+}
+
+func (nopPublisher) Publish(topic string, messages ...*message.Message) error {
+	return nil
+}
+
+func (nopPublisher) Close() error {
+	return nil
+}
+
+func BenchmarkRouterHandler(b *testing.B) {
+	logger := watermill.NopLogger{}
+
+	allProcessedWg := sync.WaitGroup{}
+	allProcessedWg.Add(b.N)
+
+	router, err := message.NewRouter(message.RouterConfig{}, logger)
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	sub := createBenchSubscriber(b)
+
+	if err := router.AddHandler(
+		"handler",
+		"benchmark_topic",
+		"publish_topic",
+		message.NewPubSub(nopPublisher{}, sub),
+		func(msg *message.Message) (messages []*message.Message, e error) {
+			allProcessedWg.Done()
+			return []*message.Message{msg}, nil
+		},
+	); err != nil {
+		b.Fatal(err)
+	}
+
+	go func() {
+		allProcessedWg.Wait()
+		router.Close()
+	}()
+
+	b.ResetTimer()
+	if err := router.Run(); err != nil {
+		b.Fatal(err)
+	}
+}
+
+func BenchmarkRouterNoPublisherHandler(b *testing.B) {
+	logger := watermill.NopLogger{}
+
+	allProcessedWg := sync.WaitGroup{}
+	allProcessedWg.Add(b.N)
+
+	router, err := message.NewRouter(message.RouterConfig{}, logger)
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	sub := createBenchSubscriber(b)
+
+	if err := router.AddNoPublisherHandler(
+		"handler",
+		"benchmark_topic",
+		sub,
+		func(msg *message.Message) (messages []*message.Message, e error) {
+			allProcessedWg.Done()
+			return nil, nil
+		},
+	); err != nil {
+		b.Fatal(err)
+	}
+
+	go func() {
+		allProcessedWg.Wait()
+		router.Close()
+	}()
+
+	b.ResetTimer()
+	if err := router.Run(); err != nil {
+		b.Fatal(err)
+	}
+}
+
+func createBenchSubscriber(b *testing.B) benchMockSubscriber {
+	var messagesToSend []*message.Message
+	for i := 0; i < b.N; i++ {
+		messagesToSend = append(
+			messagesToSend,
+			message.NewMessage(uuid.NewV4().String(), []byte(fmt.Sprintf("%d", i))),
+		)
+	}
+
+	return benchMockSubscriber{messagesToSend}
+}
+
 func publishMessagesForHandler(t *testing.T, messagesCount int, pubSub message.PubSub, topicName string) []*message.Message {
 	var messagesToPublish []*message.Message