Did you know that we've been shipping unit tests for DXperience since
version 2008.1?
If you've bought the source code version of one of our products, go to
our folder in Program Files (or Program Files (x86), if you're running
a 64-bit operating system). Navigate into the Sources folder, and
choose a product, like DevExpress.Web.ASPxGridView. Under that you
should see a Tests subfolder holding all the NUnit unit tests for that
product.
Some of the older, more established products don't have NUnit tests
yet because they used our in-house testing system (which you really
don't want to see), but we're working on it. However, in general all
the products we've been releasing over the past several months, say,
are represented.
Have a look at the tests, run them, file bugs against them if you find
something. We're glad of all feedback.