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The Big Three

The Big Three. What are the three most common complaints we hear about testing?. Problem 1. Missing or incomplete requirements Why? legacy application: cannot find the old documentation Modified application: original requirements not kept up to date. Impact ? Difficult to maintain

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The Big Three

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  1. The Big Three What are the three most common complaints we hear about testing?

  2. Problem 1 • Missing or incomplete requirements • Why? • legacy application: cannot find the old documentation • Modified application: original requirements not kept up to date. • Impact? • Difficult to maintain • Difficult to test

  3. Solution 1 • Behavioral Modeling creates a communication vehicle between the business and test engineers. • Result: • Common understanding of the application • Reverse engineered requirements • Easier to maintain and modify

  4. Problem 2 • Testing takes too long! • Why? • Too many test cases • Redundant tests • Impact? • Cost of testing is too high • Applications delayed into production

  5. Solution 2 • Behavior Modeling identifies the minimum necessary number of test cases. • In case studies, the number of test cases reduced by 75 to 90% • Result: • Less testing • Less delay • Less cost

  6. Problem 3 • Testing can miss bugs! • Why? • Test Suites are missing some functional paths or conditions • Impact? • Defects deployed to production • Costs to repair MUCH higher

  7. Solution 3 • Behavioral Modeling identifies all the functional paths of an application. • Result: • Test suite will not miss any bugs • Fewer production problems • Less cost

  8. Behavioral Modeling: What is it? • A graphical representation… • ...of the functional behavior… • …of the software article.

  9. What does it buy us? • Allows the behavior to be specified at any level of detail. • Allows different people to work on different sections at the same time. • Limited “vocabulary” enforces a high level of consistency in the models. • Allows understanding (and review) by people with a wide variety of experience.

  10. Vocabulary

  11. How do we do it? There are only two questions -- • What does it do? • “Do” in the active sense • What influences it?

  12. Sample Problem 1 • Externals only • Example – Bigger: Two numbers in One number out +1 if 1st number bigger than 2nd -1 if 1st number smaller than 2nd 0 if the numbers are equal

  13. Sample Problem 2 • FAST • The Functionally Advanced Sidewalk Teller • Deposit • Withdraw • Transfer • Check Balance

  14. Issues? • Questions? • Comments? • Concerns? • On anything we have covered so far

  15. Attributes of Good Test Suites • Effective • Efficient

  16. Next Steps • Test Design Review • Test Case Design

  17. Test Case Design Template

  18. Test Case Design Sample

  19. Test Case Specification • Test Case ID • Test Items • Input • Expected Output • Environmental Needs • Special Procedural Requirements • Inter-test case Dependencies • Actual Steps…

  20. Issues? • Questions? • Comments? • Concerns?

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