Software testing

1. Software Testing Types:
Regression, Integration,
Acceptance, and System Testing
Presented to 5th Year Software
Engineering Students

2. Introduction
• Software testing is crucial in ensuring
functionality, performance, and reliability.
• Covers Regression, Integration, Acceptance,
and System Testing.
• Reduces costs by detecting defects early.

3. Regression Testing
• Definition: Ensures changes do not break
existing functionality.
• Purpose: To verify modifications do not
introduce issues.
• Advantages: Detects unintended side effects,
ensures stability.
• Limitations: Time-consuming, requires
automation.
• Tools: Selenium, JUnit, TestComplete.
• Example: Amazon's checkout functionality

4. Integration Testing
• Definition: Tests module interactions.
• Purpose: Detects issues between combined
modules.
• Advantages: Identifies data flow and interface
issues.
• Limitations: Can be complex due to
dependencies.
• Tools: Postman, SoapUI, JUnit.
• Example: Banking system ensuring transaction
and authentication modules interact correctly.

5. Acceptance Testing
• Definition: Validates if software meets user
requirements.
• Purpose: Ensures product is ready for
deployment.
• Advantages: Confirms user satisfaction,
reduces post-release defects.
• Limitations: Subjective, time-consuming.
• Tools: FitNesse, Cucumber.
• Example: Uber's acceptance testing before
app launch.

6. System Testing
• Definition: Tests complete system
functionality.
• Purpose: Evaluates overall system behavior.
• Advantages: Ensures end-to-end functionality,
identifies critical defects.
• Limitations: Expensive, requires extensive test
environments.
• Tools: Selenium, TestNG.
• Example: Airline reservation system verifying
booking, payment, and seat allocation.

7. Comparison of Testing Types

8. Automated vs Manual Testing
• Automated Testing: Faster, repeatable,
suitable for large projects. Tools: Selenium,
JUnit.
• Manual Testing: More flexible, needed for
exploratory testing.
• Example: Facebook uses automated testing for
regression but manual testing for UI
improvements.

9. Importance of Software Testing
• Reduces cost and time by detecting bugs early.
• Enhances software reliability and user
satisfaction.
• Ensures compliance with industry standards.

10. Challenges in Software Testing
• Handling frequent code changes in Agile
development.
• Managing large-scale system integrations.
• Ensuring security and performance under high
traffic.

11. Future Trends in Software Testing
• AI-driven test automation (e.g., AI-assisted
bug detection).
• Shift-left testing (testing early in
development).
• Cloud-based testing for scalability.

12. Conclusion & Q&A
• Regression Testing ensures stability after
changes.
• Integration Testing validates module
interactions.
• Acceptance Testing confirms user satisfaction.
• System Testing verifies overall system
functionality.
• Effective testing improves software quality and
reliability.
• Questions?