diff --git a/gomore/05_fan_out/fan_out_complex.go b/gomore/05_fan_out/fan_out_complex.go
index 737159c..c5227a8 100644
--- a/gomore/05_fan_out/fan_out_complex.go
+++ b/gomore/05_fan_out/fan_out_complex.go
@@ -75,7 +75,9 @@ func (p *Pipeline) Dispatch(msg interface{}) {
 
 //NewPipeline create a Workflow  with a dispacher builder and some workers
 func NewPipeline(d DispatcherBuilder, idle uint32, debug bool) *Pipeline {
+
 	ch := make(chan interface{}, MasterQueueSize)
+
 	wk := make(map[int]*worker)
 	for i := 0; i < MaxWorkers; i++ {
 		wk[i] = &worker{
diff --git a/gomore/05_fan_out/fan_out_complex_test.go b/gomore/05_fan_out/fan_out_complex_test.go
new file mode 100644
index 0000000..06d13f7
--- /dev/null
+++ b/gomore/05_fan_out/fan_out_complex_test.go
@@ -0,0 +1,65 @@
+package fanout
+
+import (
+	"context"
+	"testing"
+
+	"google.golang.org/grpc"
+)
+
+//taggingDispatcher implement our dispatcher interface
+type taggingDispatcher struct {
+	Address string
+	//	stream  proto.StreamClient
+	conn *grpc.ClientConn
+}
+type messageContent struct{}
+
+func TestComplexStreamingFanOut(t *testing.T) {
+
+	builder := func() IDispatcher {
+		return &taggingDispatcher{Address: "SH"}
+	}
+	tagging := &Tagging{
+		topic:    "new topic",
+		pipeline: NewPipeline(builder, 2, true),
+	}
+	tagging.pipeline.Dispatch(messageContent{})
+
+	tagging.pipeline.Start(context.Background())
+}
+
+type Tagging struct {
+	topic    string
+	pipeline *Pipeline
+}
+
+func (d *taggingDispatcher) Before(ctx context.Context) error {
+	conn, err := grpc.Dial(d.Address, grpc.WithInsecure())
+	if err != nil {
+		return err
+	}
+	d.conn = conn
+	// // //	client := proto.NewClient(conn)
+	// // 	stream, err := client.StreamMetric(ctx)
+	// // 	if err != nil {
+	// // 		return err
+	// // 	}
+	// // 	d.stream = stream
+	return nil
+}
+
+func (d *taggingDispatcher) After() error {
+	// _, err := d.stream.CloseAndRecv()
+	// e := d.conn.Close()
+	// if e != nil {
+	// 	log.Error("close connection error", field.Error(e))
+	// }
+	//return err
+	return nil
+}
+
+func (d *taggingDispatcher) Process(msg interface{}) error {
+	//return d.stream.Send(msg.(*proto.Tagging))
+	return nil
+}