套装因“ SyntaxError：Unexpected token'export”'使用Jest反应打字稿而失败

问题描述

我在我的react-typescript项目中设置了玩笑和酶。在这个项目中，我没有使用babel。

我试图运行基本组件并正常运行。

此后，我添加了另一个组件，并在此组件（cc-react-common-lib）中添加了基于自定义react-typescript的lib。

当我包含cc-react-common-lib时，开玩笑会引发以下错误

语法错误：意外的令牌“导出”

 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:

    /home/convertcart/projects/intelli-blocks/node_modules/cc-react-common-lib/lib/index.js:1
    export { default as TableSpaced } from './general/table-spaced';
    ^^^^^^

    SyntaxError: Unexpected token 'export'

      1 | /* eslint-disable jsx-a11y/control-has-associated-label */
      2 | import React,{ useState,useEffect } from 'react';
    > 3 | import {
        | ^
      4 |   TextField,5 |   useAjaxForm,6 |   Spacer,

我尝试在过去1周内解决此错误，但找不到任何解决方法

jest.config.js：

module.exports = {
  // The root of your source code,typically /src
  // `<rootDir>` is a token Jest substitutes
  roots: ['<rootDir>'],// Jest transformations -- this adds support for TypeScript
  // using ts-jest
  // transform: {
  //   "^.+\\.tsx?$": "ts-jest"
  // },preset: 'ts-jest',// maxConcurrency:30,// Runs special logic,such as cleaning up components
  // when using React Testing Library and adds special
  // extended assertions to Jest
  // setupFilesAfterEnv: [
  //   "@testing-library/react/cleanup-after-each",//   "@testing-library/jest-dom/extend-expect"
  // ],// Test spec file resolution pattern
  // Matches parent folder `__tests__` and filename
  // should contain `test` or `spec`.
  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.tsx?$',// Module file extensions for importing
  moduleFileExtensions: ['ts','tsx','js','jsx','json','node'],snapshotSerializers: ['enzyme-to-json/serializer'],setupFilesAfterEnv: ['<rootDir>/setupEnzyme.ts'],};

setupEnzyme.js：

/* eslint-disable import/no-extraneous-dependencies */
import Enzyme from 'enzyme';
import ReactSixteenAdapter from 'enzyme-adapter-react-16';
Enzyme.configure({ adapter: new ReactSixteenAdapter() });

更新：当我在jest.confi.js文件中添加以下行时

transform: {
    '^.+\\.tsx?$': 'babel-jest',},

出现以下错误消息：

● Test suite failed to run

    SyntaxError: /home/convertcart/projects/intelli-blocks/client/__tests__/editblock.test.tsx: Support for the experimental syntax 'jsx' isn't currently enabled (8:29):

       6 | console.log("Edit block test");
       7 | it('Renders and Simulates Click Event ',() => {
    >  8 |     const Wrapper = shallow(<EditBlock />);
         |                             ^
       9 |     const checkbox = () => Wrapper.find({ type: 'checkbox' });
      10 |     expect(checkbox().props().checked).toBe(false);
      11 |     checkbox().simulate('change',{ target: { checked: true } });

    Add @babel/preset-react (https://git.io/JfeDR) to the 'presets' section of your Babel config to enable transformation.
    If you want to leave it as-is,add @babel/plugin-syntax-jsx (https://git.io/vb4yA) to the 'plugins' section to enable parsing.

      at Parser._raise (../node_modules/@babel/parser/src/parser/error.js:60:45)
      at Parser.raiseWithData 

解决方法

如果您通过代码编辑器插件运行测试，请尝试在编辑器中配置插件测试命令以确保插件执行正确的命令。

例如我正在使用 vscode、jestrunner 插件和纱线包管理器。所以我在我的工作区 settings.json 文件中包含了以下行：

{
    "jestrunner.jestCommand": "yarn react-scripts test"
}

同样的错误得到解决。希望它对你有用:)