开玩笑测试未通过创建反应应用程序

Question

请您帮我运行我的笑话测试。 我的带有 redux 的 create-react-app (es6) 可以按预期在浏览器中构建和运行。

开玩笑地说，我认为我的导入有问题，但不确定是什么。

你能帮我理解为什么我的笑话测试失败了吗？

---

 FAIL  src/components/__tests__/CommentBox.test.js

● 测试套件无法运行

Cannot find module 'react' from 'Provider.js'

However, Jest was able to find:
    'components/Provider.js'

You might want to include a file extension in your import, or update your 'moduleFileExtensions', which is currently ['web.js', 'js', 'web.ts', 'ts', 'web.tsx', 'tsx', 'json', 'web.jsx', 'jsx', 'node'].

See https://jestjs.io/docs/en/configuration#modulefileextensions-array-string

  at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:259:17)
  at Object.<anonymous> (../node_modules/react-redux/lib/components/Provider.js:10:38)

失败 src/components/tests/App.test.js ● 测试套件无法运行

Cannot find module 'react' from 'Provider.js'

However, Jest was able to find:
    'components/Provider.js'

You might want to include a file extension in your import, or update your 'moduleFileExtensions', which is currently ['web.js', 'js', 'web.ts', 'ts', 'web.tsx', 'tsx', 'json', 'web.jsx', 'jsx', 'node'].

See https://jestjs.io/docs/en/configuration#modulefileextensions-array-string

However, Jest was able to find:
    '../App.js'

You might want to include a file extension in your import, or update your 'moduleFileExtensions', which is currently ['web.js', 'js', 'web.ts', 'ts', 'web.tsx', 'tsx', 'json', 'web.jsx', 'jsx', 'node'].

See https://jestjs.io/docs/en/configuration#modulefileextensions-array-string

  at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:259:17)
  at Object.<anonymous> (../node_modules/react-redux/lib/components/Provider.js:10:38)

测试套件：2 个失败，总共 2 个 测试：共 0 快照：共 0 个 时间：4.715s 运行所有测试套件。

观看用法：按 w 显示更多。

Answer 1

看起来您只是缺少 react-redux 和 redux 依赖项。

只需安装它们：npm install redux react-redux，您的测试就会通过。