old_contents: var should = require('chai').should();
  var gongxi = require("../index");
  
  describe("gongxi cli test for first test", function(done) {
    it("test for faCai function", function(done) {
      result = gongxi.faCai();
      result.should.be.a("string");
      result.should.be.equal("新年快樂");
      done();
    });
  });
new_contents: var should = require('chai').should();
  var gongxi = require("../index");
  var cli = require("../bin/gongxi");
  var child_process = require("child_process");
  
  describe("gongxi main for test", function(done) {
    it("test for faCai function", function(done) {
      result = gongxi.faCai();
      result.should.be.a("string");
      result.should.be.equal("新年快樂");
      done();
    });
  });
  
  describe.only("gongxi cli test ", function(done) {
    it("test for faCai cli", function(done) {
      var command = 'bin/gongxi faCai';
      child_process.exec(command, function(err, stdout, stderr) {
        if (err) return done(err);
  
        stdout.should.be.a("string");
        stdout.should.be.equal("新年快樂\n");
        done();
      });
    });
  });
  
subject: add cli test