Catch visual regressions with Snapshots, now in beta
Blog post from Sentry
Sentry Snapshots, currently in beta, is a tool designed to catch unintended visual changes in code through screenshot diffing within continuous integration (CI) pipelines, applicable to any frontend platform. It automatically detects visual changes by comparing screenshots of the application before and after code alterations, blocking pull requests (PRs) if discrepancies are found, allowing developers to confirm intentionality. This snapshot testing provides a simple workflow to validate visual correctness across different themes, languages, or viewports, serving as a safeguard against unintentional changes. The tool is especially useful in conjunction with agents, enabling them to utilize snapshots as artifacts and improve workflows by adding context metadata to images. While the approach may not suit every repository due to challenges like managing "goldens" or git-lfs, Sentry Snapshots simplifies the process by abstracting complexities, having already proven effective for mobile apps. The platform is open to user feedback and aims to enhance code reliability and efficiency, embodying Sentry's motto, "code breaks, fix it faster."
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