This document discusses how object-oriented programming (OO) and test-driven development (TDD) were used for the Site Preview System (SPS) project in Drupal. It provides an overview of TDD, examples of writing and running tests in Drupal, and why an OO approach was useful for the relatively complex SPS system to allow for extensibility through plugins.

1. OO and TDD in SPS is cool

2. by Erik Summerfield
Phase2 Technology
esummerfield@phase2technology.com
e2thex most other places

4. What is SPS?

5. The Site Preview System developed
as part of the Content Staging Initative,
fund by a Aquia's Large Scale Drupal Project

6. What is TDD?

7. .------------.
.-------| edit Test |
| '------------'
v ^
.------------. .----------. |
| write Test |---->| run Test |--Pass---'
'------------' '----------' .------------.
| .------| Edit Code |
Fails | '------------'
v v ^
.------------. .----------. |
| write code |----->| run Test |--Fails-'
'------------' '----------'
|
Pass
v
.---------------.
| refactor code |
'---------------'

8. ✩ Refactoring is so nice
✩ Collaboration was smooth
✩ Early Detection of Design Flaws

9. Doing TDD in Drupal

10. Unit vs Web

11. Tell Drupal about your tests

12. Base Class

13. Example at http://drupalcode.org/project/sps.git/blob/refs/heads/7.x-1.x:/tests/SPSBase.test

14. Writing Tests

15. Example at http://drupalcode.org/project/sps.git/blob/refs/heads/7.x-1.x:/tests/SPSDrupalUnit.test

16. Running Tests

17. ✩ php scripts/run-tests.sh --color GROUPNAME
[output of command]
✩ php scripts/run-tests.sh --verbose --color --class CLASSNAME
[output of command]

18. Why OO for SPS?

19. ✩-SPS was a relatively comlicated system
✩ Need to allow for extendablity
✩ We could! (php 5.3)

20. Plugins

21. Plugins Class Interfaces

22. Fighting Drupal

23. Workaround hooks

24. Workaround for Forms

25. Questions?