#34 implement NewEncoder

feature_adapter.go

@@ -126,3 +126,22 @@ func (adapter *AdaptedDecoder) Buffered() io.Reader {
 	remaining := adapter.iter.buf[adapter.iter.head:adapter.iter.tail]
 	return bytes.NewReader(remaining)
 }
+
+func NewEncoder(writer io.Writer) *AdaptedEncoder {
+	stream := NewStream(writer, 512)
+	return &AdaptedEncoder{stream}
+}
+
+type AdaptedEncoder struct {
+	stream *Stream
+}
+
+func (adapter *AdaptedEncoder) Encode(val interface{}) error {
+	adapter.stream.WriteVal(val)
+	adapter.stream.Flush()
+	return adapter.stream.Error
+}
+
+func (adapter *AdaptedEncoder) SetIndent(prefix, indent string) {
+	// not implemented yet
+}

jsoniter_adapter_test.go

@@ -32,3 +32,15 @@ func Test_new_decoder(t *testing.T) {
 	should.Equal([]int{2}, arr2)
 	should.False(decoder2.More())
 }
+
+func Test_new_encoder(t *testing.T) {
+	should := require.New(t)
+	buf1 := &bytes.Buffer{}
+	encoder1 := json.NewEncoder(buf1)
+	encoder1.Encode([]int{1})
+	should.Equal("[1]\n", buf1.String())
+	buf2 := &bytes.Buffer{}
+	encoder2 := NewEncoder(buf2)
+	encoder2.Encode([]int{1})
+	should.Equal("[1]", buf2.String())
+}