Download the example or clone the repo:

curl https://codeload.github.com/zeit/next.js/tar.gz/master | tar -xz --strip=2 next.js-master/examples/with-jest
cd with-jest

Install it and test:

npm install
npm test

This example features:

• An app with jest tests

A very important part of this example is the .babelrc file which configures the test environment to use babel-preset-env and configures it to transpile modules to commonjs). Learn more.