Choose testing framework

[tkoskela]

For the medium term, we need to select a testing framework to run tests with. Popular options include

• pFUnit a parallel Fortran testing framework developed by NASA Goddard.
  • We've used this previously in https://github.com/UCL/SparseDemand
• test-drive a lightweight testing framework advocated by fortran-lang

[tkoskela]

My opinion is that pFUnit makes more sense because of its stability. test-drive looks interesting but immature at this point.

pros:

• Actively developed
• Support for MPI tests
• Can integrate with ctest
• We've used it in previous projects

  cons:

• It's a bit heavy -- probably including it as a git submodule makes most sense
• Uses metaprogramming -- compiling tests gets more complicated
• Documentation is not great -- but there are some examples in another repo + tutorials on the internet,

[tkoskela]

Decided to postpone unit tests and focus on end-to-end testing to begin with.

[davidbowler]

I wonder if we should actually close this, as we're unlikely to implement unit testing.

[davidbowler]

Closing this for now since our tests are end-to-end at the moment.