Testing with Jest in NextJS for TypeScript
npm install typescript @types/react @types/node -D
npm i jest @testing-library/react @types/jest babel-jest @testing-library/jest-dom @testing-library/user-event @testing-library/dom -D
npm install typescript @types/react @types/node -D
npm i jest @testing-library/react @types/jest babel-jest @testing-library/jest-dom @testing-library/user-event @testing-library/dom -D
npm install typescript @types/react @types/node -D npm i jest @testing-library/react @types/jest babel-jest @testing-library/jest-dom @testing-library/user-event @testing-library/dom -D
Add to package.json:
"test": "jest --watch"
"test": "jest --watch"
"test": "jest --watch"
Add to .eslintrc.json:
{
"env": {
"jest": true
}
}
{
"env": {
"jest": true
}
}
{
"env": {
"jest": true
}
}
Add to .babelrc:
{
"presets": ["next/babel"]
}
{
"presets": ["next/babel"]
}
{
"presets": ["next/babel"]
}
Create jest.config.js
// jest.config.js
module.exports = {
setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],
testPathIgnorePatterns: ['<rootDir>/.next/', '<rootDir>/node_modules/'],
};
// jest.config.js
module.exports = {
setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],
testPathIgnorePatterns: ['<rootDir>/.next/', '<rootDir>/node_modules/'],
};
// jest.config.js
module.exports = {
setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],
testPathIgnorePatterns: ['<rootDir>/.next/', '<rootDir>/node_modules/'],
};
Create jest.setup.ts
// jest.setup.ts
import '@testing-library/jest-dom';
// jest.setup.ts
import '@testing-library/jest-dom';
// jest.setup.ts import '@testing-library/jest-dom';
About Author
I am Mathias from Heidelberg, Germany. I am a passionate IT freelancer with 15+ years experience in programming, especially in developing web based applications for companies that range from small startups to the big players out there. I create Bosycom and initiated several software projects.