As unsexy as unit tests are, the quality and reliability of the Bitcoin code base could really benefit from some basic automated tests. I'm not even talking about integration tests with multiple nodes, but rather some simple tests of the core logic.
Some initial tests (not mine) are here: https://github.com/devrandom/bitcoin/blob/tests/tests.cpp
So if others agree that unit testing would be useful.. What unit test framework, if any, should be used?
Testing is a good thing, absolutely. Picking a unit test framework, and figuring out how to best integrate that into the tree, is best left to a forum discussion post, IMO.
Looks like there has been some discussion about unit testing and related refactoring issues on the forum:
http://www.bitcoin.org/smf/index.php?topic=4277.0 http://www.bitcoin.org/smf/index.php?topic=2244.0
Maybe a more incremental approach would be preferable rather than a huge refactor-the-world attempt?
The answer to that last question is almost always "yes" :)