How to Add Visual Screenshot Tests to Your Jest Test Suite

How to Add Visual Screenshot Tests to Your Jest Test Suite Your Jest tests pass. Your code is clean. But when you deploy, users see a broken layout that your test suite never caught. Visual regressions slip through unit tests. A button moved 10px. A color changed. Text overflowed. None of that breaks an assertion — but it breaks the user experience. Jest tests what the code does . They don't test what the code looks like . There's a better way: visual regression testing . Take a screenshot of your deployed app, compare it pixel-by-pixel to a baseline, and fail the test if the visual diff exceeds your threshold. Here's how to add screenshot-based visual tests to Jest. The Problem: Jest Tests Don't Catch Visual Regressions Unit tests are great for logic: // Jest test: logic passes, but layout breaks test ( ' checkout button is clickable ' , () => { const { getByRole } = render ( < CheckoutButton /> ); const button = getByRole ( ' button ' ); expect ( button ). toBeInTheDocument (); }); T