diff --git a/pkg/connection/connection.go b/pkg/connection/connection.go
index 080dd7b..b1eaffa 100644
--- a/pkg/connection/connection.go
+++ b/pkg/connection/connection.go
@@ -127,7 +127,7 @@ func New(conn net.Conn, modOptions ...ModOption) Connection {
 	}
 
 	if c.option.WriteChanSize > 0 {
-		c.wChan = make(chan wMsg, c.option.WriteBufSize)
+		c.wChan = make(chan wMsg, c.option.WriteChanSize)
 		c.flushDoneChan = make(chan struct{}, 1)
 		c.exitChan = make(chan struct{}, 1)
 		go c.runWriteLoop()
diff --git a/pkg/connection/connection_test.go b/pkg/connection/connection_test.go
index abe5be9..0327a89 100644
--- a/pkg/connection/connection_test.go
+++ b/pkg/connection/connection_test.go
@@ -6,11 +6,16 @@
 //
 // Author: Chef (191201771@qq.com)
 
-package connection
+package connection_test
 
 import (
+	"math/rand"
 	"net"
+	"sync/atomic"
 	"testing"
+	"time"
+
+	"github.com/q191201771/naza/pkg/connection"
 
 	"github.com/q191201771/naza/pkg/assert"
 	"github.com/q191201771/naza/pkg/nazalog"
@@ -26,12 +31,12 @@ func TestWriteTimeout(t *testing.T) {
 	assert.Equal(t, nil, err)
 	defer l.Close()
 	go func() {
-		conn, _ := l.Accept()
-		defer conn.Close()
+		srvConn, _ := l.Accept()
+		defer srvConn.Close()
 		<-ch
 	}()
 	conn, err := net.Dial("tcp", ":10027")
-	c := New(conn, func(opt *Option) {
+	c := connection.New(conn, func(opt *connection.Option) {
 		opt.WriteTimeoutMS = 1000
 	})
 	assert.Equal(t, nil, err)
@@ -45,3 +50,48 @@ func TestWriteTimeout(t *testing.T) {
 	}
 	ch <- struct{}{}
 }
+
+func TestWrite(t *testing.T) {
+	var sentN uint32
+	var sentDone uint32
+
+	rand.Seed(time.Now().Unix())
+	l, err := net.Listen("tcp", ":10027")
+	assert.Equal(t, nil, err)
+	go func() {
+		c, err := l.Accept()
+		srvConn := connection.New(c, func(option *connection.Option) {
+			option.WriteChanSize = 1024
+			//option.WriteBufSize = 256
+			option.WriteTimeoutMS = 10000
+		})
+		assert.Equal(t, nil, err)
+		for i := 0; i < 10; i++ {
+			b := make([]byte, rand.Intn(4096))
+			n, err := srvConn.Write(b)
+			if err == nil {
+				nazalog.Debugf("sent. i=%d, n=%d", i, n)
+			}
+			assert.Equal(t, nil, err)
+			atomic.AddUint32(&sentN, uint32(n))
+		}
+		err = srvConn.Flush()
+		assert.Equal(t, nil, err)
+		nazalog.Debugf("total sent:%d", sentN)
+		atomic.StoreUint32(&sentDone, 1)
+	}()
+
+	conn, err := net.Dial("tcp", ":10027")
+	assert.Equal(t, nil, err)
+	b := make([]byte, 4096)
+	var readN uint32
+	for {
+		n, err := conn.Read(b)
+		assert.Equal(t, nil, err)
+		readN += uint32(n)
+		nazalog.Debugf("total read:%d", readN)
+		if atomic.LoadUint32(&sentDone) == 1 && atomic.LoadUint32(&sentN) == readN {
+			break
+		}
+	}
+}