`parameterize_class` and `super()`

[couchemar]

Decorated classes fails on super() calls, because after decoration class instance changes to None.

parameterized/parameterized/parameterized.py

Line 572 in 85222cf

def decorator(base_class):

should returns base_class.

For example:

import unittest

@parameterized.parameterized_class([
    {'foo': 'bar'}
])
class Test(unittest.TestCase):

    def setUp(self):
        super(Test, self).setUp()

    def test(self):
        assert False

Fails with:

... in setUp
    super(Test, self).setUp()
TypeError: super() argument 1 must be type, not None

[broox]

i have run into this as well.

[wolever]

Okay, this turns out to be a bit of a fiddly issue.

Basically, the problem is:

1. @parameterize_class works like @parameterized.expand, where it creates synthetic subclasses (one per parameter) and injects them into the same namespace as the parent class.

2. This leaves the original class object lying around, and test runners will try to run tests with it.

3. But it doesn't make sense to run tests on the original class, as no parameters have been applied.

It seems like a reasonable workaround is to remove the test_ methods from the class being parameterized, though: #83

[wolever]

I’ve just pushed version 0.7.1 which should fix this issue 🙂