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Luca Grulla
April 23, 2012
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JavaScriptTesting
Delivered at XP2010
Luca Grulla
April 23, 2012
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Transcript
The secret art of Agile Javascrip3ng Brian Blignaut Luca Grulla Trondheim, 4/6/10 ‐ XP2010
Our background Large public facing websites Significant javascript codebase with complex DOM interacKon Heavy use of Ajax Large amount of business logic Long life expectancy
Disclaimer This presentaKon is technology agnosKc Each tool used is replaceable It is not about how to use jQuery
Technology Stack • JQuery • JSTestDriver • Ewloe • JavascriptLint
It used to be so simple…
Rich clients
We want unit tests
Scenario Login form Need to validate user credenKals Need to execute a server call via ajax POST Based on the result we need to show a welcome or an error message
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So what is wrong with this code ?
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We want to test it!
Domain abstrac3on
Abstrac3on around integra3on points
HTTP DOM PresentaKon Logic Business Logic
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Live Demo ‐ Shopping Cart
Our approach Javascript is a first class language create abstracKons: business logic presentaKon logic integraKons …but not limited to a specific paVern !! Keep your presentaKon logic class as skinny as possible in order to express intents Favour interacKon tests over integraKon tests
Tools Considera3ons ….whatever you like but has to be pluggable in your ConKnuous IntegraKon !!
Ques3ons ?
Thank You ! Brian Blignaut
[email protected]
Luca Grulla
[email protected]
hVp://www.lucagrulla.it
References Live demo starKng point code hVp://github.com/gurrie/norway Live demo refactored code hVp://github.com/gurrie/norway/tree/completedSoluKon Ewloe hVp://github.com/gurrie/ewloe