Over the past week or two I've spent my time working on a Drupal install profile. It uses a custom theme, a bunch of features and a set of modules that allows us to use Aegir to quickly provision a standard website for research centres and projects and associated with our university faculty.
To make sure this install profile keeps working as we make incremental improvements to it, I decided it would be nice to have some tests. For instance, to check that the correct theme is enabled, that the various roles defined in the features we use have the correct level of access to the nodes defined there as well and that blocks are placed in the correct regions with the correct visibility settings.
Unfortunately, the default DrupalWebTestCase class doesn't run profile install tasks, so my tests all failed horribly no matter what I did.