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Corey Haines
June 26, 2012
Programming
4
310
Yay! Mocks!
Discussion about usage of test-doubles in driving design
Corey Haines
June 26, 2012
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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