Test discovery with implicit namespace packages

[paparomeo]

Python 3.3 introduced implicit namespace packages (�PEP 420). Test discovery won't work for modules in packages which in turn are in an implicit namespace package.

[mgedmin]

That's true. Do you have any suggestions? E.g. check if a directory's parent is on sys.path, and if so, assume it's a package (handwaving the details)?

[paparomeo]

I am afraid I still haven't done any serious research into possible solutions. I noticed the issue with my current project and have reverted for the moment to using explicit namespace packages as the quick workaround. I will be revisiting this when I have some spare time in the future, but wanted to make it a known issue meanwhile.

[dataflake]

Please follow up on #160 which has more details, closing this as duplicate

[icemac]

Wow, we actually knew about this problem for 10 years! Eventually the time to fix it has come.