proxyquire 方便的nodejs 依赖覆盖方法模块

{

  "name": "proxyquire-learning",

  "version": "1.0.0",

  "main": "index.js",

  "license": "MIT",

  "dependencies": {

    "proxyquire": "^2.1.3"

  },

  "scripts": {

    "test":"node foo.test.js",

    "start":"node foo.js"

  }

}

├── bar.js

├── foo.js

├── foo.test.js

├── package.json

└── yarn.lock

module.exports = {

  toAtm: function (val) { return 0.986923267 * val }

}

var bar = require(‘./bar‘)

console.log(bar.toAtm(22))

var proxyquire = require(‘proxyquire‘)

var barStub = { }

barStub.toAtm = function (val) { return 0 /* wonder what happens now */ }

var foo = proxyquire(‘./foo‘, { ‘./bar‘: barStub })

yarn start

yarn test