Simple design and Testing by @zspencer for @rubytaiwan

“Simple”Design and Testing

by @zspencer for @rubytaiwan on May 31, 2011http://www.zacharyspencer.com

@rubytaiwan

Wednesday, June 1, 2011

http://www.zacharyspencer.com


WTF is “SIMPLE?!”

@zspencer -- http://www.zacharyspencer.com -- @rubytaiwan May 31, 2011





Everything is in my language of choice

It’s all in a single method!

Took the fewest keystrokes!

It’s aesthetically clean!

I just like it!




Maximizing the amount of work *not* done






• The Users/Customers

• The Stakeholders/Sponsors

• The Team/You

For Who?





http://www.flickr.com/photos/57634636@N00/5134293410/

Your Users







http://www.flickr.com/photos/the_warfield/4992455554/

Your Stakeholders







http://www.flickr.com/photos/reinholdbehringer/1073165898/

Your Team







Ok. How?





Radiate InformationCenter Design On The UserWrite Changeable Code





Ok. How?





4 Rules for Simple Design

* Pass All Tests * Duplicate No Behavior or Configuration * Express Intent Clearly and Consistently * Have No Superfluous Parts





All Tests Must Pass!





Automated Story Tests





Automated Unit Tests





http://www.flickr.com/photos/rogersmith/4947063094/

Exploratory Testing







http://www.flickr.com/photos/vermininc/3327459367/

No Duplication







http://www.flickr.com/photos/spine/2076612679/

Smell Yer Code!







Duplication Smells!

• Reinvented Wheel

• Combinatorial Explosion

• Middle Man

• Greedy Methods/Modules

• Data Classes

• Procedural Code

• Repeated Value

• Big Classes

http://rubylearning.com/blog/2010/11/08/how-does-your-code-smell/







http://www.flickr.com/photos/spacelion/263948300/

Express IntentClearly + Consistently!







http://www.flickr.com/photos/freeparking/2247693823/

Reveal Why







http://www.flickr.com/photos/cinderellas_blog/255282013/

(Re)Name Stuff







www.flickr.com/photos/22746515@N02/2989699245/

Extract and Move Stuff







Some More Smells!

• Uncommunicative Name

• Type Included in Name

• Inconsistent Names

• Long Parameters

• Global Variables

• Dynamic Code Creation

• Comments

• Complicated Booleans








http://www.flickr.com/photos/altuwa/4530651461/

No Superfluous Parts!






Photo Credits


• Kids Using iPads: Kathy Cassidy

• The Boardroom: The Warfield

• Software Team at Work: Reinhold Behringer

• Passing Test: Davey Brown

• Spy Plane: Roger Smith

• Octuplet Consumers: Vermin Inc.

• Smelling Wine: Rick

• Walmart Storefront: Walmart Corporate

• Breakdancer: Gueorgui

• Alfred Lord Tennyson: freeparking

• The Pelican: Cindy Andrie

• Earth Mover: Bert Kaufmann

• Rube Goldberg Machine: Sebastian B




More Learnin’


• A List of Books and Articles on Simple Design and Testing: http://bit.ly/simple_design_and_testing

• Other Resources I Think Are Awesome (Broken Down by Speciality): http://bit.ly/zspencer_recommends

• Pillars Free Webinars: http://pillartechnology.com/content/webinarbrowse

• Other Free Pillar Resources: http://pillartechnology.com/page/agilelinks




http://bit.ly/simple_design_and_testing

http://bit.ly/simple_design_and_testing

http://bit.ly/zspencer_recommends

http://bit.ly/zspencer_recommends

http://pillartechnology.com/content/webinarbrowse




http://pillartechnology.com/page/agilelinks




Simple design and Testing by @zspencer for @rubytaiwan

Technology

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