如何访问和测试node.js模块中的内部（非导出）功能？

该联控模块是绝对的答案。

这是我的代码，用于访问未导出的函数并使用Mocha对其进行测试。

application.js：

function logMongoError(){  console.error('MongoDB Connection Error. Please make sure that MongoDB is running.');}

test.js：

var rewire = require('rewire');var chai = require('chai');var should = chai.should();var app = rewire('../application/application.js');logError = app.__get__('logMongoError');describe('Application module', function() {  it('should output the correct error', function(done) {      logError().should.equal('MongoDB Connection Error. Please make sure that MongoDB is running.');      done();  });});