Writing testable code

Transcript

1. Writing testable code
2. Rodrigo Boniatti Developer at Codeminer 42 @boniattirodrigo rodrigoboniatti.com
3. Conditionals
5. Smell
8. Refactored
11. Conditionals • Smell: • High cyclomatic complexity score; • How to solve? • Replace Conditional with Polymorphism;
12. Global state
13. Smell
15. Refactored
17. Global state • Smell: • Coupling; • How to solve? • Dependency injection;
18. Life cycle events
19. Smell
21. Refactored
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