React + jest 测试 hightlight.js 报错

报错信息如下：

Jest encountered an unexpected token

Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax.

报错在这行 import 'highlight.js/styles/monokai.css'

应该是js/css文件没有转换好，

处理方式如下：

1.首先安装 babel-jest和 identity-obj-proxy

yarn add babel-jest identity-obj-proxy -D

2.然后在package.json文件中的jest配置中加

moduleNameMapper

配置

{
  "jest":{
     "moduleNameMapper": {
      "\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/__mocks__/fileMock.js",
      "\\.(css|less|scss|sass)$": "identity-obj-proxy"