1 / 17

Software Testing Course

An interview situation. How do you know that your program work correctly?What part of the total development budget should be spent on testing?Do you use coverage?Can you achieve zero defects?Have you ever used a testing tool?. Administrative details. 30% optional exercise Class slides will be

bell
Download Presentation

Software Testing Course

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Software Testing Course Shmuel Ur ur@il.ibm.com 8296250

    2. An interview situation How do you know that your program work correctly? What part of the total development budget should be spent on testing? Do you use coverage? Can you achieve zero defects? Have you ever used a testing tool?

    3. Administrative details 30% optional exercise Class slides will be on the class web-site (hopefully by Monday) Office hours upon request

    4. Outline Foundation of Modern Testing Course topics

    5. Foundation of Modern Testing Testing Defined Why do we test What do we test Modern Themes Why understanding risks is so important Testing as an integrated engineering process What is preventive testing

    6. Why do we test? Phase 0 - Testing is debugging (1950’s) Phase 1 - Show the software works (1970’s) Phase 2 - Show that the software does not work (1975’s) Phase 3 - Assess quality, evaluation (1980’s) Phase 4 - Control quality, prevention (1990’s)

    7. What do we test? Unit testing Component testing Integration testing System testing Regression testing Acceptance Testing Usability Testing

    8. More thing we test Field Testing Stress or capacity testing Platform testing Performance Testing Viral protection testing

    9. Why understanding risks is so important Bug importance = f (frequency, correction_cost, instaltion_cost, consequences) Bug consequences scale: mild, moderate, annoying, disturbing, serious, very serious, extreme, intolerable, catastrophic, infectious. Quantifying risk leads to cost-effective test sets

    10. What is preventive testing? Using tests to influence and control software design and development Implicit concurrent engineering of testware and software Preventive testing is built on the observation that one effective way to specifying something is to describe (in detail) how you would accept (test) the something if someone gave it to you. Bill Hetzel

    11. Side-effects are important The side-effect of early test preparation can be more important than later results. Side-effects Better communication Clearer and better understood requirements better design definition and understanding more reliable implementations Higher quality software!

    12. Key elements of preventive testing Tests are used as requirements models Testware design leads software design Defects are detected earlier or prevented altogether Defects are systematically analyzed Tester and developers work together

    13. Why is testing so difficult? Testing is a challenge because: Complexity of software products Nature of software behavior and problems Large amounts of information required Plus Frustration due to Attitude, Communication, Schedule, Resources, Documentation, Requirements, Changes, .....

    14. Foundation of Modern Testing Summary Testing is planning, designing, building, executing &maintaining testware We test for many reasons Good testing drives good quality testing produces a product Software and testware are strongly co-dependent

    15. Topics to be covered Coverage Regression Bug Classifications Requirement Check List Test Specifications Code Inspection

    16. Topics to be covered II Software Reliability Risks and Bug Taxonomy Domain Specific Test Generators OO Testing Ma Matrix and Complexity

    17. Topics to be covered III Test Tools Formal Verification Automatic Test Generators Random Test Generators Exploratory Testing

More Related