笑话不运行-无限期挂起 [英] Jest doesn't run -- hangs indefinitely

问题描述

我本来在create-react-app上遇到这个问题，所以我真的只是开玩笑地做了一个简单的设置:

I was originally having this problem with create-react-app, so I did really bare bones setup just of jest:

1. 创建了新目录
2. 该目录中的纱线初始化
3. 添加笑话

4. 创建了新文件sum.js:

1. created new directory
2. yarn init in that directory
3. yarn add jest

4. created new file sum.js:

   function sum(a, b) {
      return a + b;
   }
   module.exports = sum;

创建文件以测试上述功能

created file to test above function

const sum = require('./sum');

test('adds 1 + 2 = 3' , () => {
    expect(sum(1,2)).toBe(3);
});

添加到package.json:

added to package.json:

"scripts": {
"test": "jest"

}，

但是当我进行纱线测试时，我得到了:

But when I run yarn test, I get this:

terry@terry-sharewalker:~/myProjects/test-jest$ yarn jest
yarn run v1.13.0
$ /home/terry/myProjects/test-jest/node_modules/.bin/jest

从那里什么也没有发生.它只是挂了.从create-react-app运行测试也发生了同样的事情. react-scripts测试会显示，然后什么也没有.

and nothing happens from there. It just hangs. The same thing happened with running tests from create-react-app. react-scripts test would show, then nothing.

这就是我得到的:

Jest "^24.5.0"
Ubuntu 16.04
yarn 1.13.0
watchman 4.9.0
node 10.15.3

我已经重新安装并升级了我能想到的所有内容，包括npm，node，watchman，linuxbrew，yarn.如果有人可以帮助我，我将永远感激不已！！

I've reinstalled and upgraded everything I can think of, including npm, node, watchman, linuxbrew, yarn. If anybody can help me I'd be forever grateful!!

推荐答案

我不确定为什么这样做，但确实如此.我在系统上重新安装了一些全局软件包:

I'm not sure WHY this worked, but it did. I reinstalled some global packages on my system:

npm update npm -g(至6.9.0)

npm update -g  

此更新: 包裹捆绑至1.12.3

this updated: parcel-bundler to 1.12.3

更新的值班员: brew update watchman(至4.9.0)

updated watchman: brew update watchman (to 4.9.0)

这篇关于笑话不运行-无限期挂起的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！