How to test TestContextDecorator

Hi all ;)

I work with this ticket: 29024. I changed decorate_class function in TextContextDecorator:

def setUp(inner_self):
    context = self.enable()
    if self.attr_name:
        setattr(inner_self, self.attr_name, context)
    try:
        decorated_setUp(inner_self)
    except:
        self.disable()
        raise Exception

I have to test it, so I tried something like this:

class TestContextDecoratorImplementation(TestContextDecorator):
    some_var = False

    def enable(self):
        self.__class__.some_var = True

    def disable(self):
        self.__class__.some_var = False

class TestContextDecoratorTests(SimpleTestCase):

    def test_disable_method_after_exception(self):

        @TestContextDecoratorImplementation()
        class TestWithException(unittest.TestCase):
            def setUp(self):
                raise Exception("HIDE THIS")

            def test_var_is_true(self):
                self.assertTrue(TestContextDecoratorImplementation.some_var)


        class SimpleTest(unittest.TestCase):
            def test_var_is_false(self):
                self.assertFalse(TestContextDecoratorImplementation.some_var)

        runTest = lambda test: unittest.TextTestRunner().run(test)

        result = runTest(TestWithException('test_var_is_true'))
        self.assertEqual(result.testsRun, 1)
        self.assertEqual(len(result.errors), 1)

        result = runTest(SimpleTest('test_var_is_false'))
        self.assertEqual(result.testsRun, 1)
        self.assertEqual(len(result.failures), 0)

but I can`t remove exceptions from logs:

System check identified no issues (0 silenced).

E

======================================================================

ERROR: test_var_is_true (test_utils.tests.TestContextDecoratorTests.test_disable_method_after_exception.<locals>.TestWithException)

----------------------------------------------------------------------

Traceback (most recent call last):

  File "/home/pluto/git/django/django/django/test/utils.py", line 351, in setUp

    decorated_setUp(inner_self)

  File "/home/pluto/git/django/django/tests/test_utils/tests.py", line 1244, in setUp

    raise Exception("HIDE THIS")

Exception: HIDE THIS

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "/home/pluto/git/django/django/django/test/utils.py", line 354, in setUp

    raise Exception

Exception

----------------------------------------------------------------------

Ran 1 test in 0.000s

FAILED (errors=1)

.

----------------------------------------------------------------------

Ran 1 test in 0.000s

OK

.

----------------------------------------------------------------------

Ran 1 test in 0.001s

OK

How can I hide it? Or what is good way to test this class?
Regards :D

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