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A Bluffer's Guide
to Selenium 2
By: Simon Stewart & Anthony Long
What Is Selenium / Sel 2 / Webdriver
Selenium is a test automation framework that interacts with a
Webdriver is a test automation framework that interacts with
the browser directly.
Selenium 2 is the merging of the Open Source "selenium" and
The most recent release is Selenium 2.0a4.
It's really rather good.
Alphas - finish "baking" the new APIs
• Mostly done
o Need to add the advanced user API
o and handling alerts and prompts
• What's there is stable: we're only adding methods now
• Timeline: ~2 months
Betas - Implement all APIs in all supported browsers
• Supported browsers?
o Firefox 3-latest, IE 6-latest, Chrome, Android, iPhone
• Timeline: Unknown
Release - As beta, but equal support for Python, Ruby, Java
How Does It Differ From Selenium 1
Two major differences:
• Not trapped in the JS sandbox
o So there's a way to handle "alerts" on window load
o Better emulation of user input, such as clicking and
• Cleaner API
o So it's easier to write and maintain code.
o Far less confusion about which method to call.
• The OSS team are now focusing almost all their effort on
• Better support for IE
o Still a huge part of the market
• Support for testing mobile browsers
o Will form a large part of the market in future
• Buy-in and support from browser manufacturers:
• Becoming used by a broader range of OSS projects
o Not only Selenium, but also Watir
o More eyes and users means bugs detected more quickly
o And fixed more rapidly!
How Do I Migrate?
• Download Selenium 2
• Drop JARs into CLASSPATH
o Using Selenium 1 tech, but with the new classes
• Replace "DefaultSelenium" with
o An implementation of selenium using the new technology
o Inefficient, but allows a managed migration.
• Migrate code to the new API on an "as needed" basis
o Suggestion: when you edit a file using the old API, move
to the new one
What's Coming Up?
• Advanced User Interaction API:
o Allows you to model "click here, then hold shift, click on
these three elements, release shift, and drag everything
o Will be necessary for complex applications
o Selenium 2.0a5 or 6
• Implicit Waits:
o The framework will wait for an element to be present
o Timeout easy to control
o Preview in Selenium 2.0a4, fully implemented in 2.0a5
• Android support:
o Selenium 2.0a5
If You're Working on the Selenium
• Shared JS
o JS is great for querying the DOM
o Shared JS functions between all webdrivers and
o Dramatically easier to fix issues to do with JS in all
• Simplified Build Grammar
o Hey, it matters to us :)
• To build:
o svn checkout http://selenium.googlecode.com/svn/trunk/
o rake build
o cd build/