Are you using React with Rails? Maybe integrated with Webpack thanks to Webpacker? Have you always wanted to test those components but configuring tests in JS seems hard? Here is a guide on how to start because there are dragons 🐉🐉 on the road and it took me some hours to figure it out from a few other tutorials.

https://blog.arkency.com/testing-react-dot-js-components-with-jest-in-rails-plus-webpacker-plus-webpack-environment/