Testing code

The more I use it, the more I like it:

• All code should be tested, if at all possible, using unit or functional tests.
• All builds should be automated, particularly for complex builds.

The interval analysis paper I'm working on has benefited from these two: I've started a simple functional-test framework which has found several bugs. Work on an auto-build also makes life much simpler.

xUnit / TestDriven.net stopped working mysteriously and I can't get them going, in spite of updating to the latest version of both! Ouch.