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

3 Steps Every Test Should Take

Sponsored · SiteGround - Reliable hosting with speed, security, and support you can count on. →
Avatar for Matheus Richard Matheus Richard
May 27, 2021
Programming
110
0

3 Steps Every Test Should Take

Avatar for Matheus Richard

Matheus Richard

May 27, 2021

More Decks by Matheus Richard

See All by Matheus Richard
The Fast Lane: Asynchronous Rails
Avatar for Matheus Richard matheusrich
0
79
Build in Private
Avatar for Matheus Richard matheusrich
0
74
Start TDDing in 5 minutes
Avatar for Matheus Richard matheusrich
0
120
Taming God Objects: easy, incremental and secure
Avatar for Matheus Richard matheusrich
1
130
Stimulus 2.0-alpha - What's new?
Avatar for Matheus Richard matheusrich
0
56
BEM - A simple CSS methodology
Avatar for Matheus Richard matheusrich
0
56
De Repente 7
Avatar for Matheus Richard matheusrich
0
22

Other Decks in Programming

See All in Programming
AIは賢い。でも実行環境は？ CLIおじさんがAI時代に伝えたいこと ~ CLIおじさんがAI時代に伝えたいこと ~
Avatar for curekoshimizu curekoshimizu
1
150
初心者DevRelとして参加者だった私が、DevRel Talks!#2に登壇するまでにしてきたこと
Avatar for Rai sokohirai
0
340
Go を使い始めて 2 ヶ月の学び / My first two months with Go
Avatar for Daisuke Garaike contour_gara
0
420
DroidKaigi 2026 「個人開発という実験場: Android エンジニアが手にする4つの自由」
Avatar for SlashNephy slashnephy
0
220
ALB ログから Trace を気合で繋げる技術
Avatar for Hayato Kawai fohte
7
870
まだ間に合う！今年の夏こそSchemeのマクロ展開器を完全理解！
Avatar for Masanori Ogino omasanori
0
630
「AI時代、配布するPythonコードをどう守るか: 難読化の実験と判断軸」 #PyconJP2026
Avatar for PKSHA Technology（パークシャテクノロジー） pkshadeck
PRO
2
170
不幸な GC
Avatar for Chen chencmd
0
880
20260828_品質と開発生産性を両立させる、AI時代のE2Eテストの考え方
Avatar for MagicPod magicpod
0
160
이 함수, 실패하면 어떻게 되나요? null부터 Rich Errors까지, Kotlin 에러 처리 15년
Avatar for TaeHee Lee haeti2
0
130
FastAPI の並行処理モデルを完全に理解する
Avatar for Yuki Ishikawa hoto17296
9
3.8k
新人はどこまで自力でやり、どこからAIに頼るべきか／エンジニア育成に向き合う_先輩たちの悩みと知見共有会
Avatar for TOPPAN ict toppan_digital_dev
1
560

Featured

See All Featured
エンジニアに許された特別な時間の終わり
Avatar for watany watany
108
250k
Reflections from 52 weeks, 52 projects
Avatar for Jefferson Lam jeffersonlam
356
21k
The Art of Delivering Value - GDevCon NA Keynote
Avatar for David Neal reverentgeek
16
2.1k
Practical Orchestrator
Avatar for Shlomi Noach shlominoach
191
12k
Mozcon NYC 2025: Stop Losing SEO Traffic
Avatar for Sam Torres samtorres
1
520
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
Avatar for Vitaly Friedman smashingmag
254
22k
Reality Check: Gamification 10 Years Later
Avatar for Sebastian Deterding codingconduct
0
2.3k
Bootstrapping a Software Product
Avatar for Garrett Dimon garrettdimon
PRO
306
120k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
Avatar for Eileen M. Uchitelle eileencodes
141
35k
Building Experiences: Design Systems, User Experience, and Full Site Editing
Avatar for Michelle Schulp Hunt marktimemedia
0
600
Making the Leap to Tech Lead
Avatar for Ryan Cromwell cromwellryan
135
10k
Technical Leadership for Architectural Decision Making
Avatar for Kenny Baas-Schwegler baasie
3
550

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