[Python] unable to raising exception part of unit test case for a function call, with in the...

I am trying to validate a test case exception raises condition but failing with "AssertionError: Exception not raised"

Main Module with a function to test

sample_module

from xyz import AbcClass

abc_class = AbcClass()

def func1():
#few_steps
abc_class.do_something()
#few more steps


Test class

class TestClass(unittest.TestCase):

doo something …
sys.modules[‘xzy’] = MagicMock()

def test_func1():
do something …
with self.assertRaises(Exception):
with patch ("xyz.AbcClass”) as mock:
instance = mock.return_value
instance.do_something.side_effect = Exception
from src import sample_module
sample_module.func1()


Failure Log

with self.assertRaises(Exception):
E AssertionError: Exception not raised

test_sample_module.py:125: AssertionError

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