TDD as if You Meant It (2013)
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The document summarizes Peter Kofler's presentation on Test Driven Development (TDD) at Agile Testing Days 2013. It discusses the mindset of TDD coding dojos, the structure of Kofler's dojo sessions, skills practiced in TDD like designing test cases and refactoring, rules for "TDD as if you meant it," and an assignment to implement tic-tac-toe using TDD. The goal is to focus on doing TDD perfectly rather than just getting the implementation done.
TDD as if You Meant It (2013)
- 1. Coding Dojo: TDD as if You Meant It Agile Testing Days 2013 Peter Kofler, ‘Code Cop’ @codecopkofler www.code-cop.org Copyright Peter Kofler, licensed under CC-BY.
- 2. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Peter Kofler • Software Developer for 14 years • “fanatic about code quality” • I help development teams to do it right • Pair Programming #CodeCopTour
- 4. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Coding Dojo Mindset ● Safe place outside work ● We are here to learn ● Need to slow down ● Focus on doing it right ● Collaborative Game
- 5. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Dojo Structure ● Introduction 15' ● Coding 30' ● Interim (Retrospective) 15' ● Break 25' ● Coding 45' ● Retrospective 15'
- 6. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY TDD Skills ● Driving Development with Tests ● Designing Test Cases ● Designing Clean Code ● Refactoring Safely
- 7. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY TDD should be... ● Add a test ● See it fail ● Add code to make all tests pass ● Refactor mercilessly ● Repeat
- 8. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY … but often is ● Think up design ● Write some tests that verify the design ● Write full implementation ● Test, debug, test, debug, test, debug, … ● Add TODO to refactor later
- 9. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY TDD as if You Meant It
- 10. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Rules Exactly one, simplest failing test ● Least code possible to pass failing test ● Add code only to test methods ● When duplication is spotted ● Extract non-test methods (extract method) ● New classes only as target for “move method” ● Refactor as required ●
- 11. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Assignment
- 12. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Tic-Tac-Toe ● http://en.wikipedia.org/wiki/Tic-tac-toe ● Board 3x3 ● X plays first, O plays second ● Check if/who is winner
- 13. Don't Focus on Getting it Done. F0cus on Doing It Perfectly.
- 14. →Practice
- 15. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Closing Circle ● What did you learn today? ● What surprised you today? ● What will you do differently in the future?
- 16. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Please evaluate my presentation using the AgileTD Mobile App at www.touchmyconference.com/ATD2013 I appreciate your feedback.
- 17. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Peter Kofler @codecopkofler www.code-cop.org Kata by Keith Braithwaite @keithb_b http://cumulative-hypotheses.org/2011/08/30/tdd-as-if-you-meant-it/
- 18. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY CC Images ● Dojo http://www.flickr.com/photos/49715404@N00/3267627038/ ● Todos http://www.flickr.com/photos/kylesteeddesign/3724074594/ ● Signs http://www.flickr.com/photos/rwp-roger/7689114246/ ● Game http://www.flickr.com/photos/benclinch/476855843/ ● Wants you http://www.flickr.com/photos/shutter/105497713/