What is Jest for testing?
Jest is a testing framework that comes with a set of tools that make writing tests easier, faster, and more fun. One of the most powerful tools it offers is snapshot testing. Snapshot testing allows you to quickly describe how your component should look by generating images of the component in different states or sizes. Jest takes care of taking screenshots of the component in different contexts and then compares them to ensure visual consistency. This can be used for both React components as well as HTML elements.