End-to-end Web Testing
with Selenium
Stefan Priebsch, e-novative GmbH
php|works 2008, Atlanta, GA

About Me
● Stefan Priebsch
● From Munich, Germany
● Degree in computer science
● PHP enthusiast since PHP 4.0b3
● Consultant, Trainer, Author
● I help customers make better use of PHP

How do you test
web applications?

Testing in a Nutshell
● Compare calculation result
with expected value
● Automate it
● Repeat it (often)

Types of Tests
● Unit Tests
● System Tests
● Acceptance Tests
● Integration Tests
● Performance Tests
● Load Tests
● Usability Tests
● ... and don't forget security!

System Tests

The Request Cycle
● Browser requests URL
● PHP generates HTML page
● Browser creates DOM tree
● Browser renders page
● Javascript transforms DOM tree
● Browser re-renders page
● Action triggers new request

Selenium IDE
● Capture & Replay Tool
● IDE for tests
● Firefox plugin
● http://selenium-ide.openqa.org/

Live Demo

Selenium RC
● Browser Remote Control
● Supports most current browsers
● Java Proxy
● http://selenium-rc.openqa.org/

PHPUnit Integration
● http://www.phpunit.de
● pear channel-discover pear.phpunit.de
● pear install phpunit/phpunit
● PHPUnit_Extensions_SeleniumTestCase

Live Demo

Continuous Integration
● CruiseControl, Continuum, Xinc
● http://cruisecontrol.sourceforge.net/
● PHPUnderControl
● http://www.phpundercontrol.org

Virtual Machines
● XEN, KVM, VirtualBox, VMware
● Test automation requires
● Snapshot Management
● Scripting (VM start and stop)

Putting It Together
● setUp()
● Start virtual machine
● Install application
● Run test
● tearDown()
● Shutdown virtual machine
● Rollback to latest snapshot

This Gives You
● A flexible low-cost test lab
to test your web application
● against different browsers
● against different operating systems
● against different databases
● in different configurations
● different application versions

Thank you.

http://www.priebsch.de
stefan.priebsch@e-novative.de
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