Snapshot Testing
Understand how to implement snapshot testing for static React components using Jest and React Testing Library. Discover how snapshot tests help detect unintended UI changes by comparing rendered components to stored snapshots. This lesson guides you through writing and running snapshot tests to maintain quality in your React applications.
We'll cover the following...
Snapshot tests are a very useful tool when we want to make sure that our UI does not change unexpectedly. A snapshot test case follows these steps:
It renders the UI component.
It then takes a snapshot and compares it to a reference snapshot file stored alongside the test file.
If both states are the same, the snapshot test is successful. Otherwise, we will get errors and need to decide whether we need to update the snapshot tests or fix our components.
Snapshot tests are great for preventing UI regression and ensuring that the application adheres to the code quality and values of our development team.
Limitation of snapshot testing
There is a ...