New submission from Kevin Jamieson <kjamie...@qumulo.com>:
This worked in Python 3.6, but in Python 3.7 and later creating a mock with a
spec specifying a subscripted generic class does not mock any of the attributes
of the class, because those attributes are not returned by dir().
For example:
# cat test.py
from typing import Generic, TypeVar
from unittest import mock
T = TypeVar('T')
class Foo(Generic[T]):
def bar(self) -> None:
pass
m = mock.MagicMock(spec=Foo[int])
m.bar()
# python3.11 test.py
Traceback (most recent call last):
File "/root/test.py", line 11, in <module>
m.bar()
^^^^^^^
File "/usr/lib/python3.11/unittest/mock.py", line 635, in __getattr__
raise AttributeError("Mock object has no attribute %r" % name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: Mock object has no attribute 'bar'
----------
components: Library (Lib)
messages: 405981
nosy: kjamieson
priority: normal
severity: normal
status: open
title: Mock spec with a specialized generic class does not mock class attributes
type: behavior
versions: Python 3.10, Python 3.11, Python 3.7, Python 3.8, Python 3.9
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue45755>
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