单元测试 – node.js：以一种方式导出文件中的所有功能(例如,启用单元测试)的任何方法

// save this into a variable,so it can be used reliably in other contexts
var self = this;

// the scope of the file is the `exports` object,so `this === self === exports`
self.fnName = function () { ... }

// call it the same way
self.fnName();

或这个：

// You can declare your exported functions here
var file = module.exports = {
  fn1: function () {
    // do stuff...
  },fn2: function () {
    // do stuff...
  }
}

// and use them like this in the file as well
file.fn1();

或这个：

// each function is declared like this. Have to watch for typeos,as we're typing fnName twice
fnName = exports.fnName = function () { ... }

// Now you can use them as file-scoped functions,rather than as properties of an object
fnName();