Test-Driven Design

The main idea behind TDD, why it matters, and how to do it

Transcript

1. Test-Driven Design for dummies
2. Agenda • What is TDD? • Why TDD? • For the first time • More beginner style (tomorrow) • What about legacy? (on Friday)
3. Testing in General http://blogs.msdn.com/cfs-filesystemfile.ashx/__key/communityserver-blogs-components-weblogfiles/00-00-01-32-02-metablogapi/8054.image_5F00_thumb_5F00_35C6E986.png
4. What is TDD • Test-Driven what? • They don’t show you how to write software in school, ‘coz they don’t know either • How to be professional like this?
5. What is TDD • It’s actually one simple rule: • Specify what the code should do, and make it happen • Repeat it! • It’s about how you want to use your unit • Tests are side-effects
6. Red-Green-Refactor RED GREEN REFACTOR
7. It’s THE Design http://blog.myedonline.com/wp-content/uploads/2012/06/trying_to_find_X.jpg simplicity really matters
8. Why TDD • Use your brain before your fingers • Because you are not that smart, remember “dummies” ;) • It’s a safety-net • It helps you remember things, and why you do them • Out-of-the-box regression
9. Unless http://farm7.static.flickr.com/6193/6152609977_32902aa668.jpg You wanna be like him?
10. Unless or him?
11. Time We don’t have time to NOT write TESTS http://www.typemock.com/blog/2009/03/05/the-cost-of-test-driven-development/
12. Cost And these guys are from Micro$oft ;) http://www.typemock.com/blog/2009/03/05/the-cost-of-test-driven-development/
13. What About Feedback http://www.care-marketing-advice.com/wp-content/uploads/2012/07/fast-response-feedback-questionnaire.jpg
14. Is It Difficult • Not really? • It’s a discipline • And still difficult? Then do it more often..
15. Let’s Practice