Writing testable code

Transcript

1. Writing testable code

2. Rodrigo Boniatti Developer at Codeminer 42 @boniattirodrigo rodrigoboniatti.com

3. Conditionals

4. None

5. Smell

6. None
7. None

8. Refactored

9. None
10. None

11. Conditionals • Smell: • High cyclomatic complexity score; • How

    to solve? • Replace Conditional with Polymorphism;

12. Global state

13. Smell

14. None

15. Refactored

16. None

17. Global state • Smell: • Coupling; • How to solve?

    • Dependency injection;

18. Life cycle events

19. Smell

20. None

21. Refactored

22. None

23. Life cycle events • Smell: • Hide code behavior; •

    No execution order; • How to solve? • Single flow;

24. Principles of testing

25. Principles of testing • Test in isolation; • A lot

    of setup == smell; • Hard to test == smell;

26. Questions?

27. Thank you Code examples: https://github.com/boniattirodrigo/writing-testable-code