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Description
mock will store references in call_args and call_args_list (see https://docs.python.org/3/library/unittest.mock-examples.html#coping-with-mutable-arguments).
I think that pytest-mock could provide a helper based on the example from the doc:
from copy import deepcopy
>>> class CopyingMock(MagicMock):
... def __call__(self, *args, **kwargs):
... args = deepcopy(args)
... kwargs = deepcopy(kwargs)
... return super(CopyingMock, self).__call__(*args, **kwargs)
The following works (by extending the pytest-mock mocker fixture).
@pytest.fixture
def mocker(mocker):
from copy import deepcopy
from mock import MagicMock
class CopyingMock(MagicMock):
def __call__(self, *args, **kwargs):
args = deepcopy(args)
kwargs = deepcopy(kwargs)
return super(CopyingMock, self).__call__(*args, **kwargs)
mocker.CopyingMock = CopyingMock
return mocker
patched = mocker.patch('foo.bar', new_callable=mocker.CopyingMock)
Not sure if that's helpful enough and/or if there could be a mocker_copy fixture instead, which would handle new_callable not only for patch().