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

Writing testable code

Avatar for Rodrigo Boniatti Rodrigo Boniatti
November 30, 2019
Programming
0
54

Writing testable code

Avatar for Rodrigo Boniatti

Rodrigo Boniatti

November 30, 2019
Tweet

More Decks by Rodrigo Boniatti

See All by Rodrigo Boniatti
The pillars of integration
Avatar for Rodrigo Boniatti boniatti
0
66
Designing and building software with Ruby on Rails
Avatar for Rodrigo Boniatti boniatti
0
47
Mobile development with React Native
Avatar for Rodrigo Boniatti boniatti
1
3.5k

Other Decks in Programming

See All in Programming
自作OSでDOOMを動かしてみた
Avatar for Zakki zakki0925224
1
1.4k
tool ディレクティブを導入してみた感想
Avatar for Sugar Sato sgash708
1
150
DockerからECSへ 〜 AWSの海に出る前に知っておきたいこと 〜
Avatar for Itaru Ota ota1022
5
1.8k
LLMOpsのパフォーマンスを支える技術と現場で実践した改善
Avatar for po3rin po3rin
8
980
Nuances on Kubernetes - RubyConf Taiwan 2025
Avatar for Andrey Novikov envek
0
190
サーバーサイドのビルド時間87倍高速化
Avatar for PLAID Tech plaidtech
PRO
0
500
The state patternの実践 個人開発で培ったpractice集
Avatar for miyanokomiya miyanokomiya
0
150
コーディングは技術者(エンジニア)の嗜みでして / Learning the System Development Mindset from Rock Lady
Avatar for mackey0225 mackey0225
2
580
【第4回】関東Kaggler会「Kaggleは執筆に役立つ」
Avatar for Wataru Takahara mipypf
0
840
ゲームの物理
Avatar for Fadis fadis
5
1.5k
Google I/O recap web編 大分Web祭り2025
Avatar for kponda kponda
0
2.9k
Kiroの仕様駆動開発から見えてきたAIコーディングとの正しい付き合い方
Avatar for clshinji clshinji
1
150

Featured

See All Featured
What's in a price? How to price your products and services
Avatar for Michael Herold michaelherold
246
12k
What’s in a name? Adding method to the madness
Avatar for Product Marketing Alliance productmarketing
PRO
23
3.6k
Building a Modern Day 
E-commerce SEO Strategy
Avatar for Aleyda Solis aleyda
43
7.5k
Mobile First: as difficult as doing things right
Avatar for Swwweet swwweet
223
9.9k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
Avatar for Tammy Everts tammyeverts
8
480
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
Avatar for Eileen M. Uchitelle eileencodes
36
2.5k
A designer walks into a library…
Avatar for Paul Jervis Heath pauljervisheath
207
24k
Rebuilding a faster, lazier Slack
Avatar for samanthasiow samanthasiow
83
9.1k
Testing 201, or: Great Expectations
Avatar for Joseph Mastey jmmastey
45
7.6k
VelocityConf: Rendering Performance Case Studies
Avatar for Addy Osmani addyosmani
332
24k
Making Projects Easy
Avatar for Brett Harned brettharned
117
6.3k
How STYLIGHT went responsive
Avatar for nonsquared nonsquared
100
5.7k

Transcript

  1. Writing testable code

  2. Rodrigo Boniatti Developer at Codeminer 42 @boniattirodrigo rodrigoboniatti.com

  3. Conditionals

  4. None

  5. Smell

  6. None
  7. None

  8. Refactored

  9. None
  10. None

  11. Conditionals • Smell: • High cyclomatic complexity score; • How

    to solve? • Replace Conditional with Polymorphism;

  12. Global state

  13. Smell

  14. None

  15. Refactored

  16. None

  17. Global state • Smell: • Coupling; • How to solve?

    • Dependency injection;

  18. Life cycle events

  19. Smell

  20. None

  21. Refactored

  22. None

  23. Life cycle events • Smell: • Hide code behavior; •

    No execution order; • How to solve? • Single flow;

  24. Principles of testing

  25. Principles of testing • Test in isolation; • A lot

    of setup == smell; • Hard to test == smell;

  26. Questions?

  27. Thank you Code examples: https://github.com/boniattirodrigo/writing-testable-code