TDD for Testers

"Test-Driven Development is what the developers do, not us." "No-one needs to do TDD: we test everything with automated tests anyway." "TDD frightens me. I think the developers want to use it to replace me."

With all these things and more said, it's increasingly clear that there's Fear, Uncertainty, and Doubt in the testing community about the role of TDD in modern development practices.

Let's get rid of that fear, and replace it with knowledge.

In this session, you'll learn more about what TDD is, why it's such a useful tool, and when/how to use it as a tester.

You'll learn what TDD is and it's history,
You'll understand how useful a tool TDD is to testers,
You'll learn how best to work with developers who want to use TDD.

Transcript

1. TDD FOR TESTERS A PREVIEW @GARYFLEMING
2. WHY? @garyfleming
3. 1: CONFUSED SPEAKER @garyfleming
4. 2: FEAR, ANGER, CONFUSION, ANXIETY !"#$ @garyfleming
5. 3: TDD IS MY SHAME @garyfleming
6. WUT? @garyfleming
7. ! WHY SHOULD I KEEP LISTENING? > TDD: the What. > Why it matters to Testers > How to engage with Devs @garyfleming
8. YOU ARE GOOD ENOUGH @garyfleming
9. PART 1. FEAR @garyfleming
10. > Testing practice... Not really > Design Strategy... Maybe > Development practice... Probably @garyfleming
11. @garyfleming
12. NO ONE TRUE TDD @garyfleming
13. ANCHOR TERMS @garyfleming
14. THE BASICS: RED - GREEN - REFACTOR @garyfleming
15. THE BASICS: RED > Assertion Failure > Unexpected Exceptions > Missing code @garyfleming
16. THE BASICS: GREEN @garyfleming
17. THE BASICS: REFACTOR Change code without changing functionality. @garyfleming
18. METZ SAYS > Thorough > Stable > Fast > Few @garyfleming
19. ESSENTIAL: MUST. SEE. TEST. FAIL @garyfleming
20. USEFUL: THE LOOP SHOULD BE MUCH SMALLER. @garyfleming
21. PROBLEM: PEOPLE FORGET TO REFACTOR @garyfleming
22. PROBLEM: RED - GREEN - REFACTOR ISN'T ENOUGH @garyfleming
23. TWIST: SELECTION AND NAMING @garyfleming
24. PART 2: CONFUSION @garyfleming
25. I AM WHAT I AM NOT. @garyfleming
26. UNIT TESTS @garyfleming
27. UNIT TESTS > No Database > No network > No Filesystem > Must be Parallelisable > Can't have any weird environment set-up @garyfleming
28. TEST FIRST / TEST-DRIVEN DEVELOPMENT @garyfleming
29. "Why would I re-write the tests I've already written in a TDD- fashion" @garyfleming
30. PART 3: ANGER @garyfleming
31. THIS HAS NOTHING TO DO WITH US @garyfleming
32. @garyfleming
33. There is nothing so useless as doing efficiently that which should not be done at all. -- Drucker @garyfleming
34. THE RIGHT THING BUILT BADLY IS THE WRONG THING @garyfleming
35. TESTERS ARE ADVOCATES OF QUALITY @garyfleming
36. @garyfleming
37. TDD IS A QUALITY-FIRST APPROACH TO SOFTWARE @garyfleming
38. REDUCE BUGS BETWEEN 40-80% !!!!!!! @garyfleming
39. But I Automate Tests At the UI @garyfleming
40. @garyfleming
41. PART 4: ANXIETY @garyfleming
42. @garyfleming
43. PAIRING / MOBBING @garyfleming
44. SHIFT LEFT ⬅ @garyfleming
45. NOT ONLY SHIFT LEFT ⬅➡↗↘⬇⬆↙↖↕↔↪,-⤵/0⤴↩3 @garyfleming
46. @garyfleming
47. JOY ! @garyfleming
48. THANK YOU https://bit.ly/tdd-testers https://github.com/garyfleming/tdd-for-testers @garyfleming