Upgrade to Pro — share decks privately, control downloads, hide ads and more …
Sign up for free

How to write good tests?

Sponsored · SiteGround - Reliable hosting with speed, security, and support you can count on. →
Avatar for Alexander Beletsky Alexander Beletsky
April 12, 2013
Programming
360
2

How to write good tests?

Small talk that I gave to @debitoor guys about practices of writing tests.

Avatar for Alexander Beletsky

Alexander Beletsky

April 12, 2013

More Decks by Alexander Beletsky

See All by Alexander Beletsky
Snapshot Testing: Going beyond UI
Avatar for Alexander Beletsky alexbeletsky
1
730
Tech Culture in Startups
Avatar for Alexander Beletsky alexbeletsky
0
270
TDD in JavaScript
Avatar for Alexander Beletsky alexbeletsky
4
870
This is Node.js
Avatar for Alexander Beletsky alexbeletsky
10
490
Likeastore
Avatar for Alexander Beletsky alexbeletsky
3
190
PaaS in your pocker with Dokku
Avatar for Alexander Beletsky alexbeletsky
7
2.7k
Building Single Page Applications
Avatar for Alexander Beletsky alexbeletsky
9
5.5k
.NET developer in JavaScript world
Avatar for Alexander Beletsky alexbeletsky
1
2.9k
Dynamic web development with Oak
Avatar for Alexander Beletsky alexbeletsky
1
670

Other Decks in Programming

See All in Programming
FactoryBotをやめればRSpecは速くなるのか？
Avatar for nissyi yuta_onishi_97
0
610
AWSに止められる覚悟してますか？
Avatar for モリゾー morizo_1984
2
540
S3 TablesのIcebergデータに、AIエージェントからアクセスしてみた / 20261016developersio2026joetsu-accessing-iceberg-in-s3tables-via-agent
Avatar for kasacchiful kasacchiful
PRO
0
160
SalesForceを内製化！？ ~ HR事業を支える顧客管理基盤のインフラを大公開 ~
Avatar for Kobujee_53 oku053
0
180
AWS CDKのカスタムリソースでContinuum（旧Security Agent）を実装した話 | Implementing Continuum (formerly Security Agent) via AWS CDK Custom Resource
Avatar for アキキー | Akihisa Ikeda akihisaikeda
2
150
[ハンズオン]AIへの指示だけで「五目並べ」を作ってみよう
Avatar for Satoshi Kaneyasu satoshi256kbyte
1
380
Simple Storage Service(S3) is not simple
Avatar for Yura Iwatsuka iwatsukayura
0
290
なぜCTOを降りてFDEを選んだのか？〜なぜプロダクト企業がFDEで顧客の現場に踏み込むのか〜
Avatar for ryuta sakamoto gonta
1
210
Agents on Rails - Rails at Scale 2026
Avatar for Irina Nazarova irinanazarova
0
560
IBM Bob でAI駆動開発『QC-Playbook』
Avatar for 1kano ichirokano2
0
110
外から家のPCの電源入れたい！をＰＨＰで解決する
Avatar for かわしも（Shimokawa Shion） kawashimo0
1
140
Long Living Tokens, Die, Die, Die! (or: The One Ring is Banned in Modern)
Avatar for sylph01 sylph01
0
320

Featured

See All Featured
Java REST API Framework Comparison - PWX 2021
Avatar for Matt Raible mraible
34
9.8k
What the history of the web can teach us about the future of AI
Avatar for Ines Montani inesmontani
PRO
2
740
Building Flexible Design Systems
Avatar for Yesenia Perez-Cruz yeseniaperezcruz
330
41k
Thoughts on Productivity
Avatar for Jon Yablonski jonyablonski
76
5.4k
ピンチをチャンスに：未来をつくるプロダクトロードマップ #pmconf2020
Avatar for Aki / @LoveIdahoBurger aki_iinuma
128
56k
Building Applications with DynamoDB
Avatar for Matt Wood mza
96
7.2k
VelocityConf: Rendering Performance Case Studies
Avatar for Addy Osmani addyosmani
331
25k
The Art of Programming - Codeland 2020
Avatar for Erika Heidi erikaheidi
57
14k
Prompt Engineering for Job Search
Avatar for Mfonobong Umondia mfonobong
0
520
Rails Girls Zürich Keynote
Avatar for Gregor Martynus gr2m
96
14k
How to Ace a Technical Interview
Avatar for Jacob Kaplan-Moss jacobian
280
24k
<Decoding/> the Language of Devs - We Love SEO 2024
Avatar for Nikki Halliwell nikkihalliwell
1
360

Transcript

  1. How to write good tests?

  2. Honestly, I don’t know

  3. But, there are properties of good tests…

  4. … are written before code

  5. … are running very fast

  6. … are helping to find regressions

  7. Writing unit tests is not about code verification

  8. … it’s about code quality and design

  9. Think different Think TDD

  10. Could TDD be applied to everything?

  11. In short, yes code, requirements, ui

  12. Should TDD be applied to everything?

  13. Probably, no simple tasks, prototypes

  14. There are few techniques of writing tests

  15. Classic school Kent Beck, 90’s Inside-Out design Focusing on logic

    (algorithms)

  16. London school Jason Gorman, 00’s Outside-In design Focusing on collaboration

    Mocks

  17. What about integration tests?

  18. They are slow, hard to write, hard to setup… but

  19. … they usually caught most nasty bugs.

  20. None

  21. Maintaining test driven cycle

  22. None

  23. Acceptance test (PO communication) API (integration) tests Utils (units) tests

  24. Thanks, @alexbeletsky