9_ways_to_test_your_spaghetti_code_-_Devoxx_Ukraine.pdf

Transcript

1. Devoxx Ukraine 9 ways to test your spaghetti code Mads

   Opheim @MadsOpheim

2. Goal of this talk: You’ll be inspired and enabled to

   test your legacy code 2

3. What is spaghetti code? 3

4. Precondition: You are creative The computer is not 4

5. 1. Extract interface 5

6. 6

7. 7 2. Set your dependencies

8. 8

9. Singletons 9

10. 3. Package-protect problematic parts 10

11. 11

12. 4. Consider removing final 12

13. Well-designed code is testable code 13

14. 14 5. Help your team

15. 6. Run your tests - and care 15

16. 7. Feature toggles 16

17. 8. One class != one test class 17

18. 9. Test-driven development 18

19. Test-driven spaghetti 19

20. Give me more @lisacrispin, @lisihocke, @techgirl1908... 20

21. Key takeaways 21 1. Good code design improves testability 2.

    Short-term sacrifices are ok 3. Write tests for you legacy code - you can do it!

22. спасибі! 22 @MadsOpheim mads.opheim@computas.com