What is Regression Testing?
Regression Testing is a type of software testing that verifies whether new changes, enhancements, or bug fixes have impacted existing features of the application.
Objectives of Regression Testing
- Ensure existing functionality remains intact
- Detect new defects introduced due to changes
- Maintain software quality and reliability
Advantages
- Prevents introduction of new bugs
- Ensures stability of the software
- Boosts confidence during release cycles
Limitations
- Time-consuming for large applications
- Requires up-to-date test cases
- Can be costly if done manually
Regression Testing Process
- Identify affected areas after code changes
- Select relevant test cases for execution
- Execute test cases (manual or automated)
- Report any defects found
- Re-test after fixes and ensure stability
️ Example
Example: After adding a new payment gateway module, regression testing is done on the shopping cart and checkout functionality to ensure existing features work correctly.
Best Practices
- Maintain a comprehensive regression test suite
- Prioritize high-risk areas
- Automate repetitive regression tests where possible
- Execute regression tests regularly after code changes
