tests does not recognize non models.py apps

[Jari Pennanen]

1. Create Django app e.g. yourapp without models.py
2. Create tests.py inside your app.
3. Try to test this app using manage.py test yourapp

It throws an error, why? I have many Django apps I prefer to test and they don't have a single model in them and never need to.

Currently workaround is to create empty models.py to your app, though it is not very clean. Someone hasty might think that app has models, when in fact it is just templatetag library app or something like that with empty models.py.

[Dougal Matthews]

This is a duplicate of #7198 that covers the more general problem and in detail.