Test Driven Culture

1. linkedin/borislit github.com/borislit@borislitborisl@wix.com
Test Driven Culture

2. Hi.
I am Boris Litvinsky
Frontend Engineer/Team Lead
WIX Bookings
Lithuania
Ukraine
Vilnius
Kiev
Dnipro
Wix Engineering Locations
Israel
Tel-Aviv
Be’er Sheva

3. WIX By the Numbers
▪ Founded 2006
▪ Over 103M registered users from 190 countries
▪ Over 2B HTTP Requests/Day
▪ 2 Data Centers + 2 Clouds (Amazon and Google)
▪ Over 1400 Employees

4. WIX7 By Numbers
▪ Opened in 2015
▪ 40 WIXers
▪ Mostly R&D, some QA, product, UX
▪ 3 Major Products - Made in Beer Sheva
▪ “Fastest Launch in WIX History”
▪ 2 Open Source Projects

5. WIX R&D By Numbers
1400 WIX Employees - 50% R&D

6. Development Culture
▪ No ASSHOLES!
▪ Knowledge Sharing
▪ Willingness to Dare
▪ Emphasis of Software Engineering
▪ Developing Developers

7. TDD is Key

8. Thank You
linkedin/borislit github.com/borislit@borislitborisl@wix.com

9. Test Driven Development - The What
▪ Write no production code except to pass a
failing test
▪ Write only enough of a test to demonstrate a
failure
▪ Write only enough production code to pass
the test

10. The Two Loops of TDD
Write a failing
acceptance test
Write a failing
unit test
Make the test
pass
Refactor

11. Testing is Caring

12. Willingness to Dare
Refactoring - Changing structure without changing the
behavior

13. TDD and Chill
▪ Fearless Development
▪ Fearless Deployment
http://middleclick.co.za/scrum-is-not-agile/

14. ▪ QA are not responsible for quality - EVERYONE IS!
▪ Deployment by everyone
Handing the Nuclear Codes

15. Self-Education
▪ Validates your design aka “Are you sure?”
RuleEvaluator
+evaluate(string)
-parseAdjunctTerm()
-parseFactorTerm()
-parseAdjunct()
-hasMoreTokens()
-getNextToken()
RuleEvaluator
+evaluate(string)
-parseAdjunctTerm()
-parseFactorTerm()
-parseAdjunct()
RuleTokenizer
+hasMoreTokens()
+getNextToken()

16. Self-Education
▪ Validates your design aka “Are you sure?”
▪ The “AHA!” moments

17. TDD on client
JSDOM

18. TDD on the Server

19. Wrapping
Up

20. TDDo It!

21. Thank You
linkedin/borislit github.com/borislit@borislitborisl@wix.com

22. Q&A
linkedin/borislit github.com/borislit@borislitborisl@wix.com