Hacking Selenium @ JSConf

[ Hacking Selenium ] Jason Huggins @jhuggins hugs@saucelabs.com seleniumhq.org | p13y.com JSConf - 25 April 2009

1 - Why Selenium?

Browser Wars II 6, 7 & 8 2, 3 3, 4 beta 1.0 9.6 Add-ons Browser configs Languages/locales 3

Test Automation Source: - F.O.X.: http://www.flickr.com/photos/kv/499219/

Dynamic HTML - Ajax

End-to-end Workflows

Large tests

Any browser - Any platform

Selenium Cumulative Downloads 9

Firms with: 100+ downloads January – October 2008 10

2 - Why not Selenium ?

Speed Source: http://desertpastor.typepad.com/paradoxology/Slow%205.jpg

Flash, Java Applets, Silverlight, PDF Source: http://goldberg.berkeley.edu/art/big-images/doi-box-hi-res.jpg

Anything outside the JavaScript sandbox Source: http://lug.mtu.edu/wiki/images/2/27/SANDBOX.jpg

Small tests

3 - A brief history of Selenium

ThoughtWorks Time & Expense Source: - Neal Ford: http://nealford.com/downloads/conferences/2006_nfjs_canonical/Neal_Ford-Testing_with_Selenium-slides.pdf

First Attempt - JWebUnit • Simulates the browser • Can’t handle browser-specific bugs • Can’t handle JavaScript in the DOM

Second Attempt - DriftWood • Mozilla extension (never published) • Pro: – Drove a real browser, so it could handle JavaScript UI features • Con: – Not for IE or Safari :-( – XML Syntax for tests. Yuck!

Third Attempt - JsUnit • Pro: – Can test JavaScript in the browser! – Works in Mozilla/Firefox, IE, and Safari! • Con: – Emphasis on single-page unit test (no page-to-page workflows) – Couldn’t see what it was doing

It’s Green, but what did it really work?

Fourth Attempt - FIT (part 1) • Pro: – More readable tests – Emphasis on functional testing

Example FIT test

Fourth Attempt - FIT (part 2) Con: • Wasn’t available for the “JavaScript platform” yet • Limited list of “actions” in the API

Action Fixture picture

Forking FIT • Selenium initially was an attempt to implement “FIT for web browsers” • Ended up forking: – Wanted to see what the browser was doing – Wanted a richer API

4 - Side Note: What’s with the name?

“antidote for mecury poisoning”

“results - selenium”

Selenium and mercury detox

5 - Selenium Core

Selenium Core (TestRunner)

6 - Selenium IDE

Selenium IDE for Firefox

7 - Selenium Remote Control

Selenium Remote Control Source: - http://www.dkimages.com/discover/previews/824/5100491.JPG

Selenium Remote Control

8 - Selenium Grid

Selenium Grid Which is faster? (1 server, sequential tasks) 4 3 Servers 2 1 Time Source: - http://factoryjoe.com/blog/wp-content/uploads/2006/10/pods.jpg

Which is faster? (4 servers, parallel tasks) 4 3 Servers 2 1 Time 40

p13y.com Source: - http://www.flickr.com/photos/onetreehillstudios/2958752337/

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Hacking Selenium @ JSConf

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