'I can't import testing-library/react in my project
I am trying to write tests using @testing-library/react in my create-react-app with Typescript, but for some reason the module does not seem to import:
Even my editor complains:
The error reads:
Could not find a declaration file for module '@testing-library/react'. '/home/dbugger/projects/foo/node_modules/@testing-library/react/dist/index.js' implicitly has an 'any' type.
Why is this happening?
Configuration files
This is my tsconfig.json file:
{
"compilerOptions": {
"target": "es6",
"lib": [
"dom",
"dom.iterable",
"esnext"
],
"allowJs": true,
"skipLibCheck": true,
"esModuleInterop": true,
"allowSyntheticDefaultImports": true,
"strict": true,
"forceConsistentCasingInFileNames": true,
"module": "esnext",
"moduleResolution": "node",
"resolveJsonModule": true,
"isolatedModules": true,
"noEmit": true,
"jsx": "react",
"noUnusedLocals": false
},
"include": [
"src"
]
}
my jest.config.js
module.exports = {
testMatch: ['**/__tests__/**/*.(spec|test|feature).(js|ts|tsx)'],
testTimeout: 30000,
transform: {
'^.+\\.(js|jsx|ts|tsx)$': '<rootDir>/node_modules/babel-jest',
},
setupFilesAfterEnv: ['<rootDir>/setupTests.ts'],
testEnvironment: 'jest-environment-jsdom',
testPathIgnorePatterns: ['src/styles/'],
moduleNameMapper: {
'\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$':
'<rootDir>/__mocks__/fileMock.js',
'\\.(css|less|scss|sass)$': '<rootDir>/__mocks__/styleMock.js',
},
};
and my package.json:
{
"name": "abf_frontend",
"version": "2.0.0",
"private": true,
"dependencies": {
"@date-io/moment": "^1.3.13",
"@emotion/react": "^11.7.1",
"@emotion/styled": "^11.3.0",
"@material-ui/pickers": "^3.3.10",
"@mui/material": "^5.2.7",
"@nordlb-ui/nukular": "3.9.2",
"@reduxjs/toolkit": "^1.7.1",
"chart.js": "^2.9.3",
"classnames": "^2.2.6",
"env-cmd": "^10.1.0",
"eslint-plugin-import": "^2.25.4",
"eslint-plugin-react": "^7.28.0",
"history": "^4.10.1",
"lodash": "^4.17.21",
"moment": "^2.29.1",
"oidc-client": "^1.10.1",
"ramda": "0.28.0",
"react": "^17.0.1",
"react-chartjs-2": "^2.10.0",
"react-dom": "^17.0.1",
"react-download-link": "^2.3.0",
"react-hook-form": "^6.0.2",
"react-redux": "^7.2.0",
"react-resize-detector": "^6.7.7",
"react-router-dom": "^5.3.0",
"react-scripts": "3.4.1",
"react-select": "^4.3.0",
"redux-devtools-extension": "^2.13.8",
"redux-saga": "1.1.3",
"redux-saga-test-plan": "^4.0.4",
"shortid": "^2.2.16",
"typed-redux-saga": "1.3.1"
},
"peerDependencies": {
"@types/react": "^17.0.0",
"@types/react-dom": "^17.0.0",
"react": "^17.0.1",
"react-dom": "^17.0.1"
},
"devDependencies": {
"@babel/core": "^7.16.7",
"@babel/plugin-syntax-jsx": "^7.16.7",
"@babel/preset-typescript": "7.16.7",
"@testing-library/jest-dom": "^4.2.4",
"@testing-library/react": "^9.5.0",
"@testing-library/user-event": "^7.2.1",
"@types/jest": "^26.0.0",
"@types/lodash": "^4.14.178",
"@types/node": "^14.18.5",
"@types/node-sass": "^4.11.1",
"@types/ramda": "0.27.64",
"@types/react": "^17.0.38",
"@types/react-dom": "^17.0.0",
"@types/react-redux": "^7.1.21",
"@types/react-resize-detector": "^5.0.0",
"@types/react-router-dom": "^5.1.5",
"@types/react-select": "^4.0.15",
"@types/reapop": "^1.1.5",
"@types/testing-library__jest-dom": "^5.9.1",
"@types/testing-library__react": "^10.0.1",
"babel-jest": "27.0.6",
"babel-preset-react-app": "^10.0.1",
"cypress": "^9.4.1",
"eslint-config-airbnb": "^18.2.0",
"eslint-config-prettier": "^6.11.0",
"eslint-plugin-jsx-a11y": "^6.3.1",
"eslint-plugin-prettier": "^3.1.4",
"jest": "27.0.6",
"jest-dom": "4.0.0",
"node-sass": "^4.14.1",
"prettier": "^2.0.5",
"ts-jest": "^27.1.4",
"typescript": "^4.5.4",
"watch": "1.0.2"
},
"scripts": {
"start": "env-cmd -f .env.local react-scripts start",
"build": "react-scripts build",
"build:test": "env-cmd -f .env.azure-test react-scripts build",
"build:dev": "env-cmd -f .env.azure-dev react-scripts build",
"build:qa": "env-cmd -f .env.azure-qa react-scripts build",
"build:prep-external": "env-cmd -f .env.prep-external react-scripts build",
"build:prep-internal": "env-cmd -f .env.prep-internal react-scripts build",
"build:prod-external": "env-cmd -f .env.prod-external react-scripts build",
"build:prod-internal": "env-cmd -f .env.prod-internal react-scripts build",
"test": "jest --watch",
"eject": "react-scripts eject",
"cypress": "cypress open"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|


