- A testing technique that captures the output of a component, function, or system at a specific point in time and compares it against previously saved “snapshots” to detect unexpected changes. When tests run, the current output is compared to the stored snapshot, and any differences indicate potential regressions or intentional changes that need review. This approach is particularly popular in frontend development for testing UI components and ensuring visual consistency across code changes.
- Related terms: Testing · Usability testing · Visual regression testing · Over-testing
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