TDD For Mortals
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TDD for mortals, covers TDD practices and advanced topic like hexagonal architecture
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TDD For Mortals
- 2. @kfirondev The essence of TDD Use case: The throttler It is not enough Use case of server + testing strategy Hexagonal Architecture Agenda
- 3. @kfirondev The essence of TDD 01
- 4. @kfirondev@kfirondev THE ESSENCE OF TDD REFACTOR MAKE THE TEST PASS WRITE A FAILING TEST
- 5. @kfirondev Use case – the throttler 02
- 6. @kfirondev@kfirondev Get - prize Get - prize OK OK Get - prize Get - prize Already wonAlready played Get - prize Get - prize Get - prize Get - prize Get - prize Get - prize Get - prize Get - prize Get - prize Get - prize Already won Already won Already won Already won Already won Already won Already won Already won Already won Already won USER QUIZ PRIZE SERVER DATABASE
- 7. @kfirondev@kfirondev Get - prize Get - prize OK OK Get - prize Already played Get - prize Get - prize Get - prize Get - prize Get - prize Already won Already won Already won Already won Already won USER QUIZ PRIZE SERVER DATABASE FAIL FAST PATTERN T H R O T T L E R ROLLING WINDOW KEY (user-id) THROTTLER
- 8. @kfirondev Live coding – the throttler 03
- 10. @kfirondev It is not enough 04
- 11. @kfirondev TDD is a journey, it is not just red-green-refactor
- 12. @kfirondev Some of your tests are likely to be flaky – I/O hell
- 13. @kfirondev Bad design of tests will get you breaking the whole project in every refactor
- 14. @kfirondev Refactoring – extracting another class from current class must not come with another test! it is refactor
- 15. @kfirondev Yes, the tests description are part of the code, but they are not compile – It might be stale
- 16. @kfirondev To random or not to random?
- 17. @kfirondev Each test must test only one thing
- 18. @kfirondev Matchers hell! Do we need complex matchers?
- 20. @kfirondev TDD is test driven development or design? It is the developer to make proper abstractions!
- 21. @kfirondev Port and adapters (Hexagonal architecture) 05
- 23. @kfirondev Functional programming Is a good way to get there
- 24. @kfirondev Hexagonal Architecture with FP gives result which is: Deterministic Separation of concerns Fast testing lifecycle Concurrent agnostic domain model
- 25. @kfirondev Use case server design with tests 06
- 26. @kfirondev Let’s do some white boarding
- 27. @kfirondev This is where you are going to present your final words. This slide is not meant to have a lot of text.Thank You! Any Questions? Kfir Bloch
Editor's Notes
- Already won
- It not about correctness , it is about resources