Getting debug output during unit tests

Spent some time debugging issues with changes I had to make to unit test code to support a feature in development and was unable to figure out how to get print messages in either the test code itself or in the application code during a unit test run. Thus, debug capability was limited to review of short failure messages and a lot of conjecture and experimentation.

Is it possible to get print statements for either or both the test code and application code during unit tests?

thanks
Paul