Test suite failed to run

Jest encountered an unexpected token

This usually means that you are trying to import a file which Jest cannot parse, e.g. it's not plain JavaScript.

By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules".

Here's what you can do:
 • To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
 • If you need a custom transformation specify a "transform" option in your config.
 • If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.

You'll find more details and examples of these config options in the docs:
https://jestjs.io/docs/en/configuration.html

Details:

SyntaxError: /home/edi/web-dev/OnlineMarket/client/src/css/Home.css: Unexpected token (1:0)

> 1 | .home-wr {
    | ^
  2 |   position: relative;
  3 |   width: 80%;
  4 |   margin: 30px 10%;

  at Parser._raise (node_modules/@babel/parser/src/parser/error.js:60:45)
  at Parser.raiseWithData (node_modules/@babel/parser/src/parser/error.js:55:17)
  at Parser.raise (node_modules/@babel/parser/src/parser/error.js:39:17)
  at Parser.unexpected (node_modules/@babel/parser/src/parser/util.js:149:16)
  at Parser.parseExprAtom (node_modules/@babel/parser/src/parser/expression.js:1174:20)
  at Parser.parseExprSubscripts (node_modules/@babel/parser/src/parser/expression.js:541:23)
  at Parser.parseMaybeUnary (node_modules/@babel/parser/src/parser/expression.js:521:21)
  at Parser.parseExprOps (node_modules/@babel/parser/src/parser/expression.js:312:23)
  at Parser.parseMaybeConditional (node_modules/@babel/parser/src/parser/expression.js:264:23)
  at Parser.parseMaybeAssign (node_modules/@babel/parser/src/parser/expression.js

这是我在只有一个测试的情况下运行“npm test”时遇到的错误：

import React from 'react'
import ReactDOM from 'react-dom'
import App from '../src/App'

it('should render app', () => {
  let div = document.createElement('div')
  ReactDOM.render(<App />, div)
  ReactDOM.unmountComponentAtNode(div)
})

此外，此 React 应用程序位于我包含 node.js 应用程序的文件夹中： -client（包含 React 应用程序的文件夹） . . index.js（node.js 应用程序） package.json

我提到这一点是因为当我第一次为 node.js 应用程序安装 Jest 时，React 抛出一个错误，告诉我这是 jest-babel 版本的问题或类似的东西。我不知道这是否与此有关。此外，node.js 应用程序的测试运行良好。