An amazing opportunity for all the coders to improve their TDD skills in a safe and thrilling environment. Our lab is a 3 hours intensive practice event, focusing on the practice of TDD, essential for software development and design, away from the pressures of ‘getting things done’.

1. Ivan Lombardi Borgia
ivan.lombardiborgia@xpeppers.com
@ivanlombardib

2. TDD
Workshop

3. practices

4. tdd
refactoring
pair progamming

5. Test
Driven
Development

6. “Test-driven development (TDD), a
proven set of techniques that
encourage simple designs and test
suites that inspire confidence”
Kent Beck

7. “Test-driven development is a way of
managing fear during programming”
Kent Beck

8. Fast feedback
Emergent / simple design
Requirements nailed down
Non regression test suite
Always up to date code documentation
why?

9. Add a little test
Run all tests and fail
Make the simplest change to succeed
Run all tests and succeed
Refactor
how?

10. Red
Refactor Green
tdd mantra

11. Refactoring

12. Changing a software system without
altering the external behavior of the
code

13. “In essence when you refactor you are
improving the design of the code after
it has been written”
Martin Fowler

14. how?

15. Passes the tests
Reveals intention
No duplication
Fewest elements
Beck’s 4 rules of simple design

16. Pair
Programming

18. Continuous feedback / exchange
More focus
Less frustration
Higher quality fighting poor practices
Less bugs
Collective code ownership
… and it’s fun!
Why?

19. Side by side in front of the monitor
Switch role often
Communicate
Appropriate workspace layout
How?

20. String Calculator
● focus on the journey
● improve your tdd skills
● no fear to fail
Today’s kata

21. Questions?

22. and now…
Let’s start coding!!!

23. Extreme Programming Explained (Edition 2) - Kent Beck
http://www.extremeprogramming.org/
Test Driven Development By Example - Kent Beck
Refactoring - Martin Fowler
http://refactoring.com/
Resources