Upgrade to Pro — share decks privately, control downloads, hide ads and more …

3 Steps Every Test Should Take

Avatar for Matheus Richard Matheus Richard
May 27, 2021
Programming
0
86

3 Steps Every Test Should Take

Avatar for Matheus Richard

Matheus Richard

May 27, 2021
Tweet

More Decks by Matheus Richard

See All by Matheus Richard
The Fast Lane: Asynchronous Rails
Avatar for Matheus Richard matheusrich
0
38
Build in Private
Avatar for Matheus Richard matheusrich
0
67
Start TDDing in 5 minutes
Avatar for Matheus Richard matheusrich
0
110
Taming God Objects: easy, incremental and secure
Avatar for Matheus Richard matheusrich
1
100
Stimulus 2.0-alpha - What's new?
Avatar for Matheus Richard matheusrich
0
51
BEM - A simple CSS methodology
Avatar for Matheus Richard matheusrich
0
49
De Repente 7
Avatar for Matheus Richard matheusrich
0
14

Other Decks in Programming

See All in Programming
なんでRustの環境構築してないのにRust製のツールが動くの？ / Why Do Rust-Based Tools Run Without a Rust Environment?
Avatar for TOMIKAWA Sotaro ssssota
14
47k
フロントエンド開発のためのブラウザ組み込みAI入門
Avatar for Masashi Hirano masashi
7
3.6k
モテるデスク環境
Avatar for mozumasu mozumasu
3
1.4k
Pythonに漸進的に型をつける
Avatar for Nealle nealle
1
140
CSC305 Lecture 11
Avatar for Javier Gonzalez-Sanchez javiergs
PRO
0
320
AI Agent 時代的開發者生存指南
Avatar for 高見龍 eddie
4
2.2k
Google Opalで使える37のライブラリ
Avatar for MIKIO KUBO mickey_kubo
3
180
CSC509 Lecture 08
Avatar for Javier Gonzalez-Sanchez javiergs
PRO
0
270
Inside of Swift Export
Avatar for giginet giginet
PRO
1
260
Vueのバリデーション、結局どれを選べばいい？ ― 自作バリデーションの限界と、脱却までの道のり ― / Which Vue Validation Library Should We Really Use? The Limits of Self-Made Validation and How I Finally Moved On
Avatar for ねぎなす neginasu
3
1.7k
Go言語はstack overflowの夢を見るか？
Avatar for Takuto Nagami logica0419
0
670
はじめてのDSPy - 言語モデルを『プロンプト』ではなく『プログラミング』するための仕組み
Avatar for Masahiro Nishimi masahiro_nishimi
4
17k

Featured

See All Featured
Why Our Code Smells
Avatar for Brandon Keepers bkeepers
PRO
340
57k
BBQ
Avatar for Matthew Crist matthewcrist
89
9.9k
Facilitating Awesome Meetings
Avatar for Lara Hogan lara
57
6.6k
Designing for Performance
Avatar for Lara Hogan lara
610
69k
Building Applications with DynamoDB
Avatar for Matt Wood mza
96
6.7k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
Avatar for Michelle Schulp Hunt marktimemedia
31
2.6k
How Fast Is Fast Enough? [PerfNow 2025]
Avatar for Tammy Everts tammyeverts
2
210
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
Avatar for panda_program panda_program
116
20k
Sharpening the Axe: The Primacy of Toolmaking
Avatar for Bryan Cantrill bcantrill
46
2.5k
Faster Mobile Websites
Avatar for Dean Hume deanohume
310
31k
Thoughts on Productivity
Avatar for Jon Yablonski jonyablonski
72
4.9k
What’s in a name? Adding method to the madness
Avatar for Product Marketing Alliance productmarketing
PRO
24
3.7k

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

  28. None
  29. None
  30. None

  31. 🤨 Why is this good?

  32. Consistency

  33. None
  34. None
  35. None
  36. None

  37. E X E R C I S E

  38. Tests are self-contained. No mystery guests here

  39. None

  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