An introduction to Behaviour Driven Development

1. http://lifetuned.com
http://pikpak.me
Sociable Software
Delivery
An Intro to BDD
@tommysqueak http://tomphilip.me

2. What is

3. What is
Behaviour Driven
Development -
Method for producing
working high quality

6. Communication

7. Lets go on a Journey

8. Vision
How we’re going to make
money?

9. Business

10. Software that has
Features x, y, z

11. Story

12. Title
As a role
I want Feature
So that benefit

13. Browsing music by genre
As a customer
I want to find music by genre
So that so that I can discover
relevant music to my tastes

15. Examples

16. Given some context
When an event occurs
Then ensure some
outcome

17. Given a customer purchased
a track
When they download it
Then it should download to
their PC
And ...

18. Given a customer purchased
a track
And they’ve downloaded it 3
times
When they download it
Then they should be told
they’ve downloaded it too
many times

19. Now What?

20. Make an example
executable

21. Outside in
•Start from the outside working
in
•Work inwards, specifying more
examples to define the parts of
the sytem
•Specifying collaborators as you
go (mock these)
•Stop when green - repeat

22. Is it just TDD?

23. Not even at a
technical level?

24. It’s all about the
language

25. Why do it?
•Quick feedback
•Trust
•Effective communication
•Shared understanding & ownership
•Automated suite of regression tests
•Living documentation
•Code - High quality, readable,
modular, easy to change

26. #bdd
•Dan North - http://
dannorth.net/introducing-bdd/
•Liz Keogh - http://
lizkeogh.com/
•Gojko Adzic - http://
gojko.net/
@tommysqueak http://tomphilip.me

27. •
Credits
http://www.flickr.com/ • http://www.flickr.com/
photos/plenty/ photos/
3360322975/ - Telephone 29148810@N05/5440727
• http://www.flickr.com/ 436/ - Social Media
photos/ • http://www.flickr.com/
carowallis1/3728496203/ photos/poma/
- Book Stack 1410137008/ - Journey
• http://www.flickr.com/ • http://www.flickr.com/
photos/ photos/onaliencinema/
damselfly58/6840729560/ 36172851/ - Dream of
- Childrens Book what might be
• http://www.flickr.com/ • http://www.flickr.com/
photos/epsos/ photos/floato/
3501396179/ - Eggs 5842964195/ - Feature
• http://www.flickr.com/ • http://www.flickr.com/
photos/artbystevejohnson/ photos/photonquantique/
4700387846/ - Egg 5001569309 - Execution
• http://www.flickr.com/