📖 Overview
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. It ensures that previously developed and tested software still performs correctly after modifications.
🔑 Key Aspects
🎯 Objectives
- 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
📋 Process
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
Real-world 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
Best Practices for Regression Testing
Maintain a comprehensive regression test suite
Prioritize high-risk areas for faster feedback
Automate repetitive regression tests where possible
Execute regression tests regularly after code changes