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When running yarn test in package.json which is
CI=true react-app-rewired test --coverage
I got following error
Test suite failed to run
Cannot find module 'react' from 'pure.js'
However, Jest was able to find:
'./pure.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/@testing-library/react/dist/pure.js:28:37)
Not sure why getting react from pure.js, any idea?
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To solve the "Cannot find module react or its corresponding type declarations" error, install the module and its type definitions by running the commands npm install react and npm i --save-dev @types/react . Copied! Now you should be able to import the react library with the following line of code.
To solve the error "Module not found: Error: Can't resolve 'react-dom'", make sure to install the react-dom package by opening your terminal in your project's root directory and running the command npm install react-dom react and restart your development server.
To solve the error "Cannot find module 'react/jsx-runtime' or its corresponding type declarations", make sure to install the typings for react running the command npm install --save-dev @types/react@latest @types/react-dom@latest and restart your dev server.
The error "could not find declaration file for module 'react'" occurs when TypeScript cannot find the type declaration for a react-related module. To solve the error install the types for the module by running the command from the error message, e.g. npm install -D @types/react .
I was also facing the same issue, then I installed "react-test-renderer": "^16.13.1" and the issue is resolved.
So you can try this also just installed this dependency by command npm install react-test-renderer --save.
As you can see in the below image:
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Jest is unable to find 'react' because it is either not installed or the closest package.json does not have react as a dependency (if it's a monorepo).
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