This link describes the use of the VS testing system using F #. You do this almost the same as with C #.
The disadvantage is that, apparently, the VS IDE will not automatically pick it up - I believe that you need to run from the command line using mstest .exe.
Edit: Oh, another cool thing with F #, FsCheck , an automatic testing tool for F #, is basically a Haskell Quick Check port. It allows you to specify a program specification in the form of properties that functions or methods must satisfy, and FsCheck checks that properties are stored in a large number of random cases.
also fsunit and fstest
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