fix optional test

encoder.go

@@ -188,13 +188,12 @@ func (e *Encoder) EncodeWithOption(v interface{}, option *EncodeOption) (err err
 					zlog.Debug("field", zap.String("field", field.Name))
 				}
 
-				tag := field.Tag.Get("eos")
+				tag := field.Tag.Get("bin")
 				if tag == "-" {
 					continue
 				}
 
 				if v := rv.Field(i); t.Field(i).Name != "_" {
-					tag = field.Tag.Get("bin")
 					if strings.HasPrefix(tag, "sizeof=") {
 						sizeOfMap[tag] = sizeof(field.Type, v)
 					}

encoder_test.go

@@ -3,10 +3,11 @@ package bin
 import (
 	"bytes"
 	"encoding/hex"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
 	"math"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestEncoder_Float64Inf(t *testing.T) {
@@ -69,7 +70,7 @@ func Test_OptionalPrimitiveType(t *testing.T) {
 
 func Test_OptionalPointerToPrimitiveType(t *testing.T) {
 	type test struct {
-		ID *Uint64 `eos:"optional"`
+		ID *Uint64 `bin:"optional"`
 	}
 
 	out, err := MarshalBinary(test{ID: nil})

init_test.go

@@ -5,6 +5,6 @@ import (
 )
 
 func init() {
-	traceEnabled = true
+	//traceEnabled = true
 	zlog, _ = zap.NewDevelopment()
 }