Can't catch mocked exception because it doesn't inherit BaseException

Question

I\'m working on a project that involves connecting to a remote server, waiting for a response, and then performing actions based on that response. We catch a couple of diff

Answer 1

I faced a similar issue while trying to mock the sh package. While sh is very useful, the fact that all methods and exceptions are defined dynamically make it more difficult to mock them. So following the recommendation of the documentation:

import unittest
from unittest.mock import Mock, patch


class MockSh(Mock):
    # error codes are defined dynamically in sh
    class ErrorReturnCode_32(BaseException):
        pass

    # could be any sh command    
    def mount(self, *args):
        raise self.ErrorReturnCode_32


class MyTestCase(unittest.TestCase):
    mock_sh = MockSh()

    @patch('core.mount.sh', new=mock_sh)
    def test_mount(self):
        ...