错误：用摩卡testing时找不到模块

我使用babeljs来编写一个RPG引擎库。 我有两个文件：

dice.js

 import assert from 'assert'; import Random from 'random-js'; export default class Dice { constructor(maxNumber) { assert(typeof(maxNumber) === "number", "maxNumber must be a number"); this._mt = Random.engines.mt19937(); this.minNumber = 1; this.maxNumber = maxNumber; } makeThrow() { this._mt.autoSeed(); return Random.integer(this.minNumber, this.maxNumber)(this._mt); } } 

throwManager.js

 import assert from 'assert'; import Dice from 'dice'; export default class ThrowManager { constructor(settings) { assert(settings.hasOwnProperty("numberOfDices"), "must set 'numberOfDices'"); assert(settings.hasOwnProperty("maxNumberInDice"), "must set 'maxNumberInDice'"); assert(settings.maxNumberInDice <= 1, "must have at least 1 dice"); this.settings = settings; } execute() { var throwResults = []; for (var d = 1; d <= this.settings.numberOfDices; d++) { var dice = new Dice(this.settings.maxNumberInDice); throwResults.push(dice.makeThrow()); }; return throwResults; } } 

当我用mochatesting他们，我做这些import：

tests.js

 var assert = require('assert'); var Amzhen = require('../Amzhen.js'); var random = require('random-js'); //tests here... 

然而，当我运行testing，我得到这个：

 Error: Cannot find module 'dice' at Function.Module._resolveFilename (module.js:338:15) at Function.Module._load (module.js:280:25) at Module.require (module.js:364:17) at require (module.js:380:17) at Object.<anonymous> (/home/joel/Amzhen.js/Amzhen.js:47:28) at Module._compile (module.js:456:26) at Object.Module._extensions..js (module.js:474:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Module.require (module.js:364:17) at require (module.js:380:17) at Object.<anonymous> (/home/joel/Amzhen.js/test/tests.js:2:14) 

任何想法为什么dice模块没有被发现？

我正在用babel src --out-file Amzhen.js && mocha编译代码

Answer 1

你应该使用：

 import Dice from './dice'; 

'dice'不是已发布，已安装的Node.js模块的名称，而是本地文件，因此您应该使用./dice和相应的path。

另请参阅node.js中的Module not found错误