Selenium is an automated software testing framework for web applications. It drives a real browser automatically, as if a real person was doing the clicking and typing. We use it here at The Economist for functional / black-box / acceptance testing, the kind of tests that are repetitive and time-consuming to step through manually.
We’ve setup a system that runs our full suite of regression tests in parallel, using virtual machines in the Rackspace cloud, on every commit to trunk. The entire suite takes just under 8 minutes to run, which is the length of the longest test. A screencast of each individual test run is captured in full motion MP4 video, and made available as a build artifact in Hudson for anyone to download and watch. The video is captured at full resolution (1200 x 2000), but you can see a scaled down version below of an actual test running on Economist.com: