 Regression testing

Checking whether a software change alters previously established behavior. A reference output must first be justified rather than merely copied from old software.

Regression testing is a type of software testing that involves re-running previously completed tests on a new version of the software to ensure that existing functions continue to work as intended after changes have been made. These changes may include enhancements, bug fixes, or other updates to the software. The primary goals of regression testing are to: 1. **Verify Fixes**: Ensure that any defects identified in previous versions have been successfully fixed and that the fix did not introduce new issues.