[Tutor] Unittest question

[Peter Otten]

On 31/07/2022 18:19, Albert-Jan Roskam wrote:
>     Hi,
>     I am trying to run the same unittests against two different
>     implementations of a module. Both use C functions in a dll, but one uses
>     ctypes and the other that I just wrote uses CFFI. How can do this nicely?
>     I don't understand why the code below won't run both flavours of tests. It
>     says "Ran 1 test", I expected two!
>     Any ideas?

No patience to read the stackoverflow suggestions in your follow-up
posts, but here's a simple approach that should be good enough to solve
the actual problem: parameterize test *classes* with the module (or
module name).

import unittest


class CommonTests(unittest.TestCase):
    def test_impl(self):
        self.module.whatever()


class CFFITests(CommonTests):
     import foo as module


class CtypesTests(CommonTests):
     import bar as module


del CommonTests  # without that you get three tests


if __name__ == "__main__":
     unittest.main()  # rely on the default test discovery mechanism