Are you tired of TDD workshops that make you do boring things like calculate bowling scores and prime factors or demonstrate how to win at the game of life? If so, this is the session for you! In this TDD workshop we will be building the domain model for EverCraft -- a new MMORPG from Blizzards of the Coast. We have lots of story cards prepared covering features from combat to magic, classes to spells, and races to items. Plus, we'll be defining some of these cards during the session in case you want that +9 knife of ogre slaying or enjoy casting magic missile at the darkness. This workshop is language agnotisic and for all levels of developers. The focus is on TDD and emergent design but pair programming will be covered as well. The only requirement is that you bring a laptop and that you be able to test-drive you code with your language of choice. When you are done you will emerge a better programmer for the experience but there is small chance you will have a craving for Cheetos and Mountain Dew.

1. Putting the
D&D in
TDD

2. Introductions
George Walters
@walterg2
walterg2@gmail.com
Guy Royse
@guyroyse
guy@guyroyse.com

3. Adjusting the Levels
• Interrupt Us
• All Levels Session
– covering some basics
• Not Selling TDD
– showing how not why
– the experience will show the why
• We Expect You to Pair
• Language Agnostic
– Ruby, Java, .NET, JavaScript, CoffeeScript, Clojure, Scala, Groovy,
Dart… maybe not
• You Know Your Tools
– we’re not here to teach you JUnit or RSpec

4. Katas

5. The
Evercraft
Kata

6. Adjusting the Levels
• Introduction
• TDD & Ping Pong Pairing
• Four Iterations
– retrospective after each iteration
– brainstorming before iterations 2-4
•
•
•
•
•
•
Iteration 1: Core Rules
Iteration 2: Classes
Lunch
Iteration 3: Races
Iteration 4: Items
Bonus Iteration: Battle Grid

7. Our Character Sheets
5th Level Facilitator
• + 5 to Teaching: can help
and teach almost any
student
• Bonus Feats: TDD and Pair
Programming
• Kata Mastery: have
mastered the Evercraft
Kata and can help if pairs
get log-jammed
1st Level Product Owner
• Ideation: can form general
ideas for a product at will
but won't know exactly
what they want
• Clarity: given a question
on requirements can
unerringly answer it
• Agile Advocate: can
promote Pairing, TDD, and
other Agile ideas to
business 3 times per day

8. Questions?

9. TDD & Ping
Pong
Pairing

10. A Brief History
of Testing

11. TDD Cycle
Write a
Failing
Test
Refactor
Your
Crappy
Code
Code Just
Enough to
Make It
Pass

12. Ping Pong Pairing
Write a
Failing
Test
Refactor
Your
Crappy
Code
Code Just
Enough to
Make It
Pass

13. Dos & Don’ts
Do…
• …start with a failing test.
• …write tests that become
more and more specific.
• …write code that becomes
more and more generic.
• …take turns writing
tests, coding, and
refactoring.
• …kibitz while pairing.
• …consider keeping a list of
tests you need to write.
Don’t…
• …write more than one test
at a time.
• …have more than one
assert in a test.
• …write any more code
than is needed to make the
current test pass.
• …code alone.

14. Questions?

15. Evercraft

18. During the Kata
• Ask Questions
– as product owners we might not know what we want
– as facilitators we might have gaps in our material
• Present Ideas
– as product owners we might like them more
• Code the Model Only
• No Dice (it's just not worth the hassle)

19. Rolling Up a Character
• Roll Your Own
• Clone from GitHub
– https://github.com/walterg2/EverCraft-Kata
– Available Projects
•
•
•
•
•
•
•
Java & JUnit
C# & NUnit
Ruby & RSpec
CoffeeScript or JavaScript & Jasmine
Python
Clojure
Scala

20. Core Rules
Iteration 1

21. Classes
Iteration 2

22. Reorientation
Welcome Back

23. Races
Iteration 3

24. Items
Iteration 4

25. Retrospective

26. And
The
Winner
Is…

27. Contact Information
George Walters
@walterg2
walterg2@gmail.com
Guy Royse
@guyroyse
guy@guyroyse.com

28. Image Credits
http://www.flickr.com/photos/kimonomania/602858091
http://www.flickr.com/photos/warquel/3300858929
http://www.flickr.com/photos/pandiyan/82387772
http://www.flickr.com/photos/camerajohn/5151120039
http://www.flickr.com/photos/kaptainkobold/174388593
http://www.flickr.com/photos/cuppini/2378443920
http://www.flickr.com/photos/melloveschallah/3304593555
http://www.flickr.com/photos/denemiles/3971887734
http://www.flickr.com/photos/howardlake/4318605890