Make LazyFixture iterable

[michael-k]

This does work now:

@pytest.mark.parametrize('arg1', [
   pytest.lazy_fixture('needs_db')
])
@pytest.mark.django_db
def test_some(arg1):
    assert ...

But it's not quite what I need. The fixture needs_db returns a list and I'd like to parametrize test_some with that list:

@pytest.mark.parametrize('arg1', pytest.lazy_fixture('needs_db'))
@pytest.mark.django_db
def test_some(arg1):
    assert ...

This fails: TypeError: 'LazyFixture' object is not iterable

Is it possible to support this use case? I'm not familiar with pytest's internals. :/

[TvoroG]

@michael-k thanks again for reporting a bug :) I'll take a look

[TvoroG]

Well, I think I've just now realized what your use case :) Do you want to parametrize test with some data from db? If so, it's not quite possible. When pytest.mark.parametrize wants to iterate through your data (argument values), pytest_django autouse fixtures are not yet executed, so there is no even test db.

[michael-k]

That's what I feared. :/