Regression and performance testing
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Regression and performance testing

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Regression and performance testing

Regression and performance testing

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    Regression and performance testing Regression and performance testing Presentation Transcript

    • SOFTWARE REGRESSION AND PERFORMANCE TESTING Dr. Himanshu Hora SRMS College of Engineering & Technology Bareilly (INDIA)
    • What is Software Regression Testing? What is Software Regression Testing? - Testing activities occur after software changes. - Regression testing usually refers to testing activities during software maintenance phase. Major testing objectives: - Retest changed components (or parts) - Check the affected parts (or components) Regression testing at different levels: - Regression testing at the unit level - Re-integration - Regression testing at the function level - Regression testing at the system level
    • What is Software Regression Testing? Who perform software Regression: Developers - regression testing at the unit level or integration Test engineers - regression testing at the function level QA and test engineers - regression testing at the system level What do you need to perform software regression testing? - Software change information (change notes). - Updated software REQ and Design specifications, and user manuals. - Software regression testing process and strategy. - Software regression testing methods and criteria.
    • Problems and Challenges in Software Regression Testing Major problems in software regression testing: - How to identify software changes in a systematic way? - REQ. specification changes - Design specification changes - Implementation (or source code) changes - User manual changes - Environment or technology changes - Test changes - How to identify software change impacts in a systematic way? - REQ impacts - Design impacts - Implementation impacts - User impacts - Test impacts
    • Problems and Challenges in Software Regression Testing Major regression testing problems: - How to use a systematic method or tool to identify changed software parts? - How to use a systematic method or tool to identify software change impacts? - How to use a systematic method or tool to identify affected software test cases? - How to reduce the re-test suites? - How to select the test cases in a test suite? Major challenge in software regression testing: - How to minimize re-testing efforts, and achieve the adequate testing coverage?
    • Software Regression Process Software Regression Process: Step #1: Software Change Analysis - Understand and analyze various software changes. Step #2: Software Change Impact Analysis - Understand and analyze software change impacts Step #3: Define Regression Test Strategy and Criteria Step #4: Define, select, and reuse test cases to form a regression test suite Step #5: Perform re-testing at the different levels. - re-testing at the unit level - re-testing at integration level - re-testing at the function level - re-testing at the system level Step #6: Report and analyze regression test results
    • Software Regression Process Software Change Analysis Software Change Impact Analysis Define Regression Testing Strategy Build Regression Test Suite Run Regression Tests at different levels Report Retest Results
    • “With an order of magnitude fewer variables performance testing could be a science, but for now, performance testing is at best a scientific art.” --Scott Barber Vice President & Executive Director, Association for Software Testing www.associationforsoftwaretesting.org
    • PERFORMANCE TESTING What Testing conducted to evaluate the compliance of a system or component with specified performance requirements (IEEE). Why To meet/exceed the customers’ expectations as per the agreed SLAs (Service Level Agreements) for the response time of different business functions. How - Outsourcing - In house with Purchased Tools - In house with Leased Tools 9
    • Good Performance…?
    • Define Performance Testing  Stress Testing: Stress Testing is done in order to check when the application fails by varying the system resources such as RAM, HDD etc. and keeping the number of users as constant.  Load Testing: Load Testing is done in order to check when the application fails by increasing the number of users and keeping the system resources as constant.  Performance Testing: The term Performance can mean measuring response time, number of hits , resource utilization, or some other system characteristic( or group of them), by varying the number of users.
    • Performance Testing Tools • • • • HP-LoadRunner Compuware-QA Load IBM-Rational Performance Tester Borland-Silk Performer
    • Benefit of Performance Testing If done well, there can be benefits: • Dramatically reduce the overhead involved in managing test environments • Easier for performance testing to have it’s own test environment • Enable collaborative tuning without having to “borrow” hardware resources • Put the test team in control of their test environments Virtualization does not change the core principles of successful performance testing
    • SUMMARY:“Only performance testing at the conclusion of system or regression testing is like ordering a diagnostic blood test after the patient is dead.” --Scott Barber Vice President & Executive Director, Association for Software Testing www.associationforsoftwaretesting.org
    • REFERENCES • • • • • www.sqe.com/ControlImages/sqe/.../empirix_archivepresentation www.qaiconferences.org/tempEQAA/Performance%20testing https://wiki.uta.edu/download/attachments/48170179/Testing www.idi.ntnu.no/emner/tdt4242/materials/Regression-testing www.engr.sjsu.edu/gaojerry/course/287/regression-test
    • Thank You Dr. Himanshu Hora SRMS College of Engineering & Technology Bareilly (INDIA)