3 Steps Every Test Should Take

Transcript

1. 3 Steps Every Test Should Take
2. About me Matheus Richard
3. This is a ⚡lightning talk⚡, so I’m gonna go FAST 󰝊💨
4. 🧪 Tests
5. 😄 Tests are good! They make us more productive. Right?
6. ❌ WRONG!
7. ✔Good tests are good
8. 🐢 Poorly written tests slow us down!
9. Developer happiness-meter: 🙁 🐌 Slow tests
10. Developer happiness-meter: 😞 🤔 Confusing tests 🐌 Slow tests
11. 󰣽 Flaky tests Developer happiness-meter: 😠 🤔 Confusing tests 🐌 Slow tests
12. 󰣽 Flaky tests Developer happiness-meter: 🤬 🤔 Confusing tests 📦 Brittle tests 🐌 Slow tests
13. 🐌 Slow tests 󰣽 Flaky tests 📦 Brittle tests 🤔 Confusing tests
14. Good tests tell a story
15. The story has 4 acts
16. 📝 1. Setup
17. 📝 1. Setup Create objects Define function inputs
18. 📝 1. Setup 🏋 2. Exercise
19. 📝 1. Setup 🏋 2. Exercise Calling methods Saving objects to DB
20. 📝 1. Setup 🏋 2. Exercise 󰡷 3. Verify
21. 📝 1. Setup 🏋 2. Exercise 󰡷 3. Verify Check if the output is the expected
22. 📝 1. Setup 󰡷 3. Verify 🏋 2. Exercise 💥 4. Teardown
23. 📝 1. Setup 󰡷 3. Verify 🏋 2. Exercise 💥 4. Teardown Undo changes Release memory Restore DB
24. 📝 1. Setup 🏋 2. Exercise 󰡷 3. Verify 💥 4. Teardown You’re welcome!
25. 📝 1. Setup 󰡷 3. Verify 🏋 2. Exercise
26. 📝 1. Arrange 󰡷 3. Assert 🏋 2. Act aka
27. 📝 1. Given 󰡷 3. Then 🏋 2. When aka
31. 🤨 Why is this good?
32. Consistency
37. E X E R C I S E
38. Tests are self-contained. No mystery guests here
40. 1. Verify Developer confusion-meter: 🤔❓
41. 1. Verify 2. Exercise + Setup Developer confusion-meter: 🥴⁉
42. 1. Verify 2. Exercise + Setup? 3. Verify Developer confusion-meter: 😵
43. Developer confusion-meter: 😵
44. Developer happiness-meter: 🥰
45. SPACE IS IMPORTANT Developer happiness-meter: 🥰
46. Developer happiness-meter: 😐
47. Developer happiness-meter: 🥰
48. Good tests have 4 3 steps
49. 📝 1. Setup
50. 📝 1. Setup 🏋 2. Exercise
51. 📝 1. Setup 󰡷 3. Verify 🏋 2. Exercise
52. We need not only tests, but good tests!
53. We want good code and tests are code too!
54. That’s it Feel free to ask any question