Suggestions from @christopheredsall are

• funit - now achieved
• pfunit - recommended and used at MET office

There must be a good way to integrate with Cmake to do test discovery. Some googling required.

Cmake test discovery does not work with either in the same way as would be expected from googletest. Instead the unit testing test executable can be run as a single ctest. The downside of this is that a single unit test failure would return a error code but ctest would report 0/1 failed. The details of the unit test output would still be logged so its not a big issue.

We had a discussion that, due to the nature of this code, there is a lot of correctness that would be covered by integration tests (#62), and unit testing would be a little harder / less effective. That said, I can see how torch_module_forward and torch_from_blob_c could have some unit tests.

fwiw, pfunit was pretty easy to build locally (in non-MPI mode at least).