fix: should reset _classRefFields (#87)

https://github.com/node-modules/hessian.js/pull/86/files#r145311196

Author: fengmk2

lib/v2/encoder.js

@@ -13,8 +13,8 @@ function Encoder(options) {
   EncoderV1.call(this, options);
 
   this._classRefs = [];
-  this._typeRefs = [];
   this._classRefFields = {};
+  this._typeRefs = [];
 }
 
 util.inherits(Encoder, EncoderV1);

test/v2.list.encode.test.js

@@ -8,9 +8,7 @@ var utils = require('../lib/utils');
 var java = require('js-to-java');
 
 describe('hessian v2', function () {
-
-  it('v2 list encode should ok', function() {
-
+  it('v2 list encode should ok', function () {
     var arg = {
       "$class": "com.x.Site",
       "$": {
@@ -205,6 +203,9 @@ describe('hessian v2', function () {
     var rs = hessian.decode(bytes, '2.0');
     assert.deepEqual(java.revert(arg), rs);
 
+    hessian.encoderV2.reset();
+    assert(hessian.encoderV2._classRefs.length === 0);
+    assert(hessian.encoderV2._typeRefs.length === 0);
+    assert(Object.keys(hessian.encoderV2._classRefFields).length === 0);
   });
-
 });