Lock in $30 Savings on PRO—Offer Ends Soon! ⏳
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Yay! Mocks!
Search
Corey Haines
June 26, 2012
Programming
4
310
Yay! Mocks!
Discussion about usage of test-doubles in driving design
Corey Haines
June 26, 2012
Tweet
Share
More Decks by Corey Haines
See All by Corey Haines
Getting the most out of a conference
coreyhaines
3
250
Other Decks in Programming
See All in Programming
TUIライブラリつくってみた / i-just-make-TUI-library
kazto
1
380
dnx で実行できるコマンド、作ってみました
tomohisa
0
150
Navigation 3: 적응형 UI를 위한 앱 탐색
fornewid
1
310
複数人でのCLI/Infrastructure as Codeの暮らしを良くする
shmokmt
5
2.3k
Canon EOS R50 V と R5 Mark II 購入でみえてきた最近のデジイチ VR180 事情、そして VR180 静止画に活路を見出すまで
karad
0
100
sbt 2
xuwei_k
0
270
TestingOsaka6_Ozono
o3
0
130
Rediscover the Console - SymfonyCon Amsterdam 2025
chalasr
2
160
令和最新版Android Studioで化石デバイス向けアプリを作る
arkw
0
390
Tinkerbellから学ぶ、Podで DHCPをリッスンする手法
tomokon
0
120
【Streamlit x Snowflake】データ基盤からアプリ開発・AI活用まで、すべてをSnowflake内で実現
ayumu_yamaguchi
1
120
TypeScriptで設計する 堅牢さとUXを両立した非同期ワークフローの実現
moeka__c
6
3k
Featured
See All Featured
For a Future-Friendly Web
brad_frost
180
10k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
54k
A better future with KSS
kneath
240
18k
Measuring & Analyzing Core Web Vitals
bluesmoon
9
700
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
32
1.8k
Music & Morning Musume
bryan
46
7k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
196
70k
Done Done
chrislema
186
16k
Become a Pro
speakerdeck
PRO
31
5.7k
Why Our Code Smells
bkeepers
PRO
340
57k
BBQ
matthewcrist
89
9.9k
Agile that works and the tools we love
rasmusluckow
331
21k
Transcript
Tuesday, June 26, 2012
YAY! Mocks! @coreyhaines Nordicy RubyConf 2012 Tuesday, June 26, 2012
YAY! Test Doubles! @coreyhaines Nordicy RubyConf 2012 Tuesday, June 26,
2012
Zak! Tuesday, June 26, 2012
Test-Driven Development Tuesday, June 26, 2012
Object-Oriented is about messages Tuesday, June 26, 2012
Object-Oriented is about interactions Tuesday, June 26, 2012
Object-Oriented is about services Tuesday, June 26, 2012
Roles vs Things Tuesday, June 26, 2012
Test-Driven Development Tuesday, June 26, 2012
Test-First Development Tuesday, June 26, 2012
Test-Driven vs Test-First Tuesday, June 26, 2012
Reaction to pain Tuesday, June 26, 2012
Test-First -> Change Tests Tuesday, June 26, 2012
Test-Driven -> Change Design Tuesday, June 26, 2012
Test-Doubles Often Highlight Pain Tuesday, June 26, 2012
Zak! Tuesday, June 26, 2012
Examples Tuesday, June 26, 2012
Showing list of Coderetreats for today Tuesday, June 26, 2012
You have to change your test When you change this
hash Tuesday, June 26, 2012
Feels Very Fragile Tuesday, June 26, 2012
PAIN! Tuesday, June 26, 2012
Discomfort! Tuesday, June 26, 2012
Tuesday, June 26, 2012
Why is this information relevant to the controller? Tuesday, June
26, 2012
Bypassing Layers Tuesday, June 26, 2012
This is odd Tuesday, June 26, 2012
Controller calling database? Tuesday, June 26, 2012
Controller should know ‘WHAT’ not ‘HOW’ Tuesday, June 26, 2012
Better to insert a layer Tuesday, June 26, 2012
Controller Business-Oriented Services DB Tuesday, June 26, 2012
What, not How Tuesday, June 26, 2012
Better to delegate the How Tuesday, June 26, 2012
TDD is about design Tuesday, June 26, 2012
Change design, not tests Tuesday, June 26, 2012
Focusing on usage Tuesday, June 26, 2012
I like Presenters! Tuesday, June 26, 2012
Tuesday, June 26, 2012
double depending on doubles?? Tuesday, June 26, 2012
UGH! Tuesday, June 26, 2012
Too much detail at this level? Jumping levels of abstraction?
Tuesday, June 26, 2012
Change design to fix pain Tuesday, June 26, 2012
Simplify our example Tuesday, June 26, 2012
Simplify our example Tuesday, June 26, 2012
Much simpler, more focused on what the controller needs to
know Tuesday, June 26, 2012
Tuesday, June 26, 2012
TDD is about refactoring Tuesday, June 26, 2012
TDD is about refactoring away from discomfort Tuesday, June 26,
2012
Changing your design, to fix pain Tuesday, June 26, 2012
Test doubles can help highlight and fix pain Tuesday, June
26, 2012
Take-Home Challenge Tuesday, June 26, 2012
Tuesday, June 26, 2012
Coupled Roles Tuesday, June 26, 2012
Unnecessary noise Tuesday, June 26, 2012
or false positive if yesterday’s or tomorrow’s are not created
in database Tuesday, June 26, 2012
How to change design to fix this? Tuesday, June 26,
2012
Thanks! @coreyhaines Nordicy RubyConf 2012 font inspiration: bit.ly/corey-sans Tuesday, June
26, 2012