Save the world: design for testability

Presentation by @lucasxas

Transcript

1. design for testability Save the world Lucas Xavier @lucasxavier
2. About me Lucas Xavier @lucasxavier • Lucas Xavier - Software Engineer for five years - Test Specialist, UFPE - Bsc in Information Systems, UFS - Nonsense humour - Game of Thrones - Rock!
3. Agenda • Value proposition • What’s testability? • Best practices • Anti-patterns • Unit Testing and TDD • Hands-on! Lucas Xavier @lucasxavier
4. Value proposition • Design + coding + debugging + testing • Certainties in life • Death • Taxes • Bugs • Early feedback Lucas Xavier @lucasxavier
5. What’s testability? • Repeatable • Easy to Write • Easy to Understand • Fast Lucas Xavier @lucasxavier
6. What’s testability? • Components: • Control • Visibility • Operability • Simplicity • Understandability • Suitability • Stability Lucas Xavier @lucasxavier
7. Best practices • Set up and teardown • KISS • Loose coupling • Dependency injection • Elimination of globals • Clear code Lucas Xavier @lucasxavier
8. Anti-patterns • Unclear execution paths • Train Wrecks • Dependencies between test cases • Testing precise timing or performance • All-knowing oracles • Slow running tests Lucas Xavier @lucasxavier
9. Unit Testing and TDD • Unit Testing • Test Driven Development • Unit Testing is a component of TDD Lucas Xavier @lucasxavier
10. Hands-on! Lucas Xavier @lucasxavier