反应与开玩笑:无法从测试文件中找到模块 [英] React & Jest: Cannot find module from test file

问题描述

在目录app/__tests__中为Redux操作('App.js')设置Jest测试('App-test.js'):

Setting up a Jest test ('App-test.js') for a Redux action ('App.js') in a directory app/__tests__:

这是App.js的标头:

Here's the header of App.js:

jest.unmock('../../modules/actions/App.js')

import React from 'react'
import ReactDOM from 'react-dom'
import TestUtils from 'react-addons-test-utils'

import * as App from '../../modules/actions/App.js'

在app/中有一个模块config.js.这是在需要的地方导入的.

In app/ there is a module config.js. This is being imported where it is needed.

问题是，当我运行Jest测试(例如App-test.js)时，它正在寻找配置，但找不到它:

The problem is, when I run my Jest tests, such as App-test.js, it is looking for config and not finding it:

 FAIL  __tests__/actions/App-test.js
Runtime Error
Error: Cannot find module 'config' from 'User.js'

然后User.js像这样导入config: import config from 'config'

User.js是另一个正在使用的动作App.js.

有什么想法吗?

推荐答案

您应指定模块位置，否则Node.js将尝试为您猜测位置，例如:

You should specify the module location, otherwise Node.js will try to guess the location for you, like:

node_modules/config.js
node_modules/config/index.js
node_modules/config/package.json

代码中的问题是假设节点将在所需位置查找文件，正如您在前几行提供的算法中所见.

The problem in your code is the assumption that node will look for the file in the desired location, as you can see in the algorithm I provided in the previous lines.

要解决此问题，您必须在User.js文件中指定位置，例如，检查假设的文件组织:

To fix the issue you have to specify the location inside your User.js file, for example, check the hypothetical file organization:

/
/config.js
/app
/app/User.js

然后，您将导入User.js:

Then, you'd import inside User.js:

import config from '../config.js'

文件config.js相对于位于父目录中的User.js.

The file config.js is relative to User.js, located in the parent directory.

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