raising unittest.SkipTest in setUpClass creates an error

[jayvdb]

Within setUp and test methods raise unittest.SkipTest works well.
When a setUpClass has a raise unittest.SkipTest, the following error occurs instead of a skip:

======================================================================
ERROR: _ErrorHolder
----------------------------------------------------------------------
Traceback (most recent call last):
  File ".../tests/aspects.py", line 597, in setUpClass
    super(RequireUserMixin, cls).setUpClass()
  File ".../tests/aspects.py", line 562, in setUpClass
    % (cls.__name__, env_var))
SkipTest: 'TestSiteSysopWrite' write tests disabled. Set PYWIKIBOT2_TEST_WRITE=1 to enable.

https://github.com/wikimedia/pywikibot-core/blob/09dce8fe3b3041eccdc8dc8ede9857cda42a6d7c/tests/aspects.py#L559

[sirosen]

I suspected that with recent refactors this might have been resolved.
I just tried to reproduce on the latest version, and this worked just fine:

import unittest


class ExampleTest(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        raise unittest.SkipTest("foo")

    def test_some_stuff(self):
        assert True

However, the above example works correctly on all releases I tested going back to 0.5.0 , so perhaps the above doesn't properly capture the bug?

I'm going to close as a CNR, but I will very happily revisit this if someone can give a failing example for me to test against.