Since the naming of a unit test method makes its purpose more meaningful, is it necessary to add a summary to a unit test method?
Example:
///
For the example above, I would say that it's not necessary, unless you use a tool that extracts documentation from source (like javadoc or something).
A common rule of thumb is that the code says what you're doing and the comment says why, but since the name is so very verbose (which I think is ok, since no one ever has to type it) I don't think that the comment contributes anything.
If you think that it's the best use of your time, do it, otherwise don't. I wouldnt.