text: var test = function (name) {
  
      this.name = name;
  
      this.sayHello = () => {
          return 'hello' + this.name;
      }
  
      this.sayGoodBye = () => {
          return 'goodbye' + this.name;
      }
  }
  test.prototype.nihao = '123456';
  test.prototype.hehe = (name) => {
      console.log('hehe' + name);
  }
  
  module.exports = test;
  
  console.log(module.exports);
  
  console.log(exports);
  