anchor.diff:  import 'dart:typed_data';
   import 'package:test/test.dart';
   import 'package:hprose/io.dart';
  -import 'package:hprose/rpc_core.dart';
   
   void main() {
     TypeManager.register((data) => User.fromJson(data),
  
positive.code:     expect(utf8.decode(Formatter.serialize("")), equals("e"));
      expect(utf8.decode(Formatter.serialize("c")), equals("uc"));
      expect(utf8.decode(Formatter.serialize("我")), equals("u我"));
      expect(utf8.decode(Formatter.serialize("我爱你")), equals('s3"我爱你"'));
      expect(utf8.decode(Formatter.serialize("我爱五星红旗🇨🇳")),
          equals('s10"我爱五星红旗🇨🇳"'));
      expect(
  
negative.code:     expect(Formatter.deserialize(Formatter.serialize("")), equals(""));
      expect(Formatter.deserialize(Formatter.serialize("c")), equals("c"));
      expect(Formatter.deserialize(Formatter.serialize("我")), equals("我"));
      expect(Formatter.deserialize(Formatter.serialize("我爱你")),
          equals('我爱你'));
      expect(
          Formatter.deserialize(
              Formatter.serialize("我爱五星红旗🇨🇳")),
          equals('我爱五星红旗🇨🇳'));
      expect(Formatter.deserialize(Formatter.serialize([1, 2, 3, 4, 5])),
          equals([1, 2, 3, 4, 5]));
  