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A Practical Guide to Regression Testing: Types, Timing, and Automation

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Regression testing is a software quality practice that verifies existing functionality remains intact after code changes such as bug fixes, new features, or refactors. A key distinction exists between retesting, which confirms a specific bug is fixed, and regression testing, which ensures nothing else broke as a result of that fix. Three main types exist: corrective regression reuses current tests for minor changes, complete regression covers the entire system for major updates, and selective regression targets only affected areas. Automation is considered essential for making regression testing scalable, as manual testing on large applications is too slow and costly to be sustainable. Regression tests should be run after bug fixes, new feature additions, component integrations, and before every production release.

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A Practical Guide to Regression Testing: Types, Timing, and Automation · ShortSingh