Unit testing for Grown-ups
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When you're going to introduce a new process to your team, like unit testing, it's going to be hard. Developers have their own experiences, opinions and even objections (gasp!). This webinar slides are about what to expect, and how to deal with them. And the developers too.
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Unit testing for Grown-ups
- 2. Hello! I AM GIL ZILBERFELD www.testingil.com http://www.everydayunittesting.com/ @gil_zilberfeld
- 4. 5
- 5. @gil_zilberfeld Solve problems for customers and the organization People want their problems solved fast
- 6. Code That works And easy to maintain
- 11. @gil_zilberfeld
- 13. Dev cycles graphics “real” development time
- 16. @gil_zilberfeld Upfront testing increases productivity ◉ Development is iterative ◉ From iteration 2, they save us time ◉ Code works now and later ◉ “Getting into new code” time decreases ◉ Time to market decreases
- 19. The automated testing pyramid http://blogs.agilefaqs.com/2011/02/01/inverting-the-testing-pyramid/
- 20. @gil_zilberfeld Getting to full coverage Unit tests A+B+C+ X+Y+Z = 6 tests Integration tests AX+AY+AZ+ BX+BY+BZ+ CX+CY+CZ = 9 tests
- 21. @gil_zilberfeld Longer ◉ Confidence ○ High ◉ Cost ○ Bigger setup ○ Harder to debug ○ More fragile Shorter ◉ Confidence ○ Medium ◉ Cost ○ Small setup ○ Easier to debug ○ Pinpoint the problem Test paths
- 22. @gil_zilberfeld Testing mindset Think of cases you didn’t think of (yet)
- 27. @gil_zilberfeld The fallacy of “Twice the time” ◉ Developer time is spent reading code, not writing ◉ Mostly because we want to make sure we didn’t break anything ◉ It may double the code ◉ And frankly, it doesn’t matter
- 30. @gil_zilberfeld Design affects testability ◉ Dependency injection ◉ Singletons and static data ◉ Configuration parameters ◉ Abstraction and encapsulation
- 31. “If you brought us a functionally correct design that required our app to run on a million AWS instances, we’d casually say "no, that’s not valid.” https://www.geepawhill.org/2020/12/11/the-steering-premise/
- 32. @gil_zilberfeld
- 33. @gil_zilberfeld
- 34. The TDD cycle
- 36. Code That works And easy to maintain
- 37. @gil_zilberfeld
- 38. @gil_zilberfeld
- 39. Thanks! ANY QUESTIONS? You can find me at: LinkedIn: Profile, Company XING: Profile, Group: Twitter: @gil_zilberfeld http://www.testingil.com