Is unit testing always automated?

Question

Can anyone provide an source that says that unit testing is not always done in an automated or programmatic way? I always assumed it meant testing code through code. I have a bet on this, so I need solid sources.

Answer 1

From Wikipedia:

[A unit test's] implementation can vary from being very manual (pencil and paper) to being formalized as part of build automation.

I don't think you will win your bet. :(

Answer 2

You are going to lose the money / beer / doughnuts, unit testing can be automated thru various test frameworks (such as nunit) or purely be done manually.