jest is a testing framework for react. In this example we show how to use jest to do DOM-testing for react applications in next

npm install --save-dev jest babel-jest enzyme

• jest - The testing framework
• babel-jest - Babel preprocessor for test files
• enzyme - Mock render the elements

Add test script to the recommended package.json

package.json

...
"scripts": {
    "test": "jest",
    ...
}
...

npm run test