JHipster uses a combination of Jest and Enzyme to unit test the client-side components.

Jest (https://jestjs.io/) is used as the testing framework. Enzyme (http://airbnb.io/enzyme/) is a testing utility for React that makes it easy to unit test React components. In combination, these libraries provide a rich and intuitive testing environment for React.

Let's run the generated unit tests. Run npm test in a Terminal. The tests should all pass out of the box.