Intro to Unit Testing with test Driven Development
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The document introduces Test Driven Development (TDD) consulting and training services offered by Wintellect, highlighting their expertise in advanced software solutions. It emphasizes the importance of unit testing in coding, the TDD process, and offers resources for learning, including a daily TDD exercise called 'kata.' Contact information for further inquiries is also provided.
![The Multiply Method Signature
Int32 Multiply(Int32[] values)
Consulting/Training](https://image.slidesharecdn.com/intrototdd-141029094808-conversion-gate02/85/Intro-to-Unit-Testing-with-test-Driven-Development-6-320.jpg)
![Consulting/Training
Question #3
What happens when I pass you:
[3, 4]?
I donโt know](https://image.slidesharecdn.com/intrototdd-141029094808-conversion-gate02/85/Intro-to-Unit-Testing-with-test-Driven-Development-9-320.jpg)
![Consulting/Training
Question #4
What happens when I pass you:
[7]?
I donโt know](https://image.slidesharecdn.com/intrototdd-141029094808-conversion-gate02/85/Intro-to-Unit-Testing-with-test-Driven-Development-10-320.jpg)
![Consulting/Training
Question #5
What happens when I pass you:
[-5, 12, 10, -3]?
I donโt know](https://image.slidesharecdn.com/intrototdd-141029094808-conversion-gate02/85/Intro-to-Unit-Testing-with-test-Driven-Development-11-320.jpg)
![Consulting/Training
Question #7
What happens when I pass you:
[23, Int32.MaxValue]?
I donโt know](https://image.slidesharecdn.com/intrototdd-141029094808-conversion-gate02/85/Intro-to-Unit-Testing-with-test-Driven-Development-13-320.jpg)
Intro to Unit Testing with test Driven Development
- 1. Intro to Test Driven Development (TDD) Consulting/Training
- 2. Consulting/Training About Me ๏ Microsoft Client Development MVP ๏ ASPInsider ๏ Twitter: @joelcochran ๏ Email: [email protected] ๏ Blog: joelcochran.com ๏ Lead Developer, WintellectNOW
- 3. Consulting/Training About Wintellect Founded by top experts on Microsoft โ Jeffrey Richter, Jeff Prosise, and John Robbins โ we pull out all the stops to help our customers achieve their goals through advanced software-based consulting and training solutions. consulting Wintellect helps you build better software, faster, tackling the tough projects and solving the software and technology questions that help you transform your business. ๏ Architecture, Analysis and Design ๏ Full lifecycle software development ๏ Debugging and Performance tuning ๏ Database design and development training Wintellect's courses are written and taught by some of the biggest and most respected names in the Microsoft programming industry. ๏ Learn from the best. Access the same training Microsoftโs developers enjoy ๏ Real world knowledge and solutions on both current and cutting edge technologies ๏ Flexibility in training options โ onsite, virtual, on demand who we are
- 4. Wintellectโs On-Demand Video Training Solution Try it free Code: <INSERT CODE HERE> WintellectNOW.com COCHRAN-13 Authors Enjoy: ๏ Royalty Income ๏ Personal Branding ๏ Cross-Sell Opps ๏ Free library access Subscribers Enjoy: ๏ Expert Instructors ๏ Quality Content ๏ Practical Application ๏ All Devices Consulting/Training Individuals | Businesses | Enterprise Organizations
- 5. Interview with a Method Consulting/Training
- 6. The Multiply Method Signature Int32 Multiply(Int32[] values) Consulting/Training
- 7. Consulting/Training Question #1 What parameter(s) do you take? An Array of Int32
- 8. Consulting/Training Question #2 What value type do you return? Int32
- 9. Consulting/Training Question #3 What happens when I pass you: [3, 4]? I donโt know
- 10. Consulting/Training Question #4 What happens when I pass you: [7]? I donโt know
- 11. Consulting/Training Question #5 What happens when I pass you: [-5, 12, 10, -3]? I donโt know
- 12. Consulting/Training Question #6 What happens when I pass you: null? I donโt know
- 13. Consulting/Training Question #7 What happens when I pass you: [23, Int32.MaxValue]? I donโt know
- 14. Consulting/Training Question #8 You donโt seem to know muchโฆ If you donโt know the answer to these questions, who does? The Unit Tests
- 15. Consulting/Training What is a Unit Test? ๏ Code that tests code ๏ Small discrete chunks (units) ๏ One test, one condition ๏ Based on assumptions ๏ Should be automated and repeatable
- 16. What a Unit Test is Not Consulting/Training ๏ An end-to-end test ๏ Connected to live data ๏ Performing external functions (like sending an Email) ๏ User tests
- 17. Consulting/Training Why write Unit Tests? ๏ Test code to ensure proper functionality given certain assumptions ๏ Exercise code without running the app ๏ Write once, run a million times ๏ Guards against unintended consequences ๏ Tests define success
- 18. Consulting/Training What is TDD? ๏ Unit Tests are written before the code ๏ Helps shape the code to the task at hand ๏ Provides focus (YAGNI) ๏ The test defines success ๏ Run all tests every time
- 19. Consulting/Training TDD Pattern RED write a failing test GREEN write enough code to pass REFACTOR engineer the code
- 20. Anatomy of a Unit Test Consulting/Training Arrange โข Assumptions โข Expectations Act โข Execute โข Results Assert โข Compare โข Report
- 21. Consulting/Training TDD Kata ๏ Daily exercise โ 30 minutes or less ๏ Roy Osherove, author of โThe Art of Unit Testingโ, Manning Publications ๏ http://osherove.com/tdd-kata-1/ ๏ Letโs code!
- 22. The String Calculator Kata Consulting/Training
Editor's Notes
- #14: Actual result == Int32.MaxValue โ (multiplier โ 1) == 2147483625 Int32.MaxValue = 2147483647 Every time you multiply (except for * 1) you overflow the Integer value Subtract 1 for the value of 0 every time this happens