[TIP] excluding test modules based on python version

[Florian Bruhin]

Hey,

On Fri, Jul 21, 2017 at 07:38:25AM +0100, Chris Withers wrote:
> I'd like to write some tests for a package that I maintain using some Python
> 3 - only syntax, type annotations in this case.
> 
> How can I tell pytest or nose to ignore that file, but only when running
> under Python 2?

With pytest, put something like this in your conftest.py:

    import sys
    
    def pytest_ignore_collect(path):
        if path.basename == 'test_py3.py' and sys.version_info[0] != 3:
            return True

related docs:
https://docs.pytest.org/en/latest/writing_plugins.html#local-conftest-plugins
https://docs.pytest.org/en/latest/writing_plugins.html#_pytest.hookspec.pytest_ignore_collect

As for nose, even the nose docs recommend not using nose anymore ;)
http://nose.readthedocs.io/en/latest/#note-to-users

Florian

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