javascript 错误：用 mocha 测试时找不到模块
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Error: cannot find module when testing with mocha
提问by Joel A. Villarreal Bertoldi
I'm using babeljsto write an RPG engine library. I have two files:
我正在使用babeljs编写 RPG 引擎库。我有两个文件：
dice.js
骰子.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
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;
}
}
When I test them with mocha, I do these imports:
当我用 测试它们时mocha，我会执行这些导入：
tests.js
测试.js
var assert = require('assert');
var Amzhen = require('../Amzhen.js');
var random = require('random-js');
//tests here...
Yet when I run the tests, I get this:
然而，当我运行测试时，我得到了这个：
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)
Any ideas why the dicemodule isn't being found?
为什么dice找不到模块的任何想法？
I'm compiling the code with babel src --out-file Amzhen.js && mocha
我正在编译代码 babel src --out-file Amzhen.js && mocha
回答by Timothy Gu
You should use:
你应该使用：
import Dice from './dice';
'dice'is not the name of a published, installed Node.js module, but a local file, so you should use ./dicewith an appropriate path.
'dice'不是已发布的、已安装的 Node.js 模块的名称，而是一个本地文件，因此您应该使用./dice适当的路径。
See also Module not found error in node.js
另请参阅node.js 中未找到模块错误
