autospec for spy: remove if else which was in place for python < 3.7

[yesthesoup]

I made this PR in the past #224 which worked on an if/else for the spy feature to get around a bug in python that was fixed in 3.7. Now that this library supports only >= 3.8 this check is no longer needed.

I suppose this would be "breaking changes" for anyone who may be incorrectly calling methods on class/static method spies?

[nicoddemus]

Hey @yesthesoup, thanks for the follow up!

I suppose this would be "breaking changes" for anyone who may be incorrectly calling methods on class/static method spies?

To confirm, would any Python 3.8+ user be affected by this change in any way?

[yesthesoup]

Hey @yesthesoup, thanks for the follow up!

I suppose this would be "breaking changes" for anyone who may be incorrectly calling methods on class/static method spies?

To confirm, would any Python 3.8+ user be affected by this change in any way?

I believe they would only be affected if their tests were silently passing when they shouldn't be like in the examples in the Python docs:

https://docs.python.org/3/library/unittest.mock.html#auto-speccing

mock = Mock(name='Thing', return_value=None)
mock(1, 2, 3)
mock.assret_called_once_with(4, 5, 6)  # would not throw error in their current tests - silently pass

e.g. if they had some class method / static method spies that pytest-mock was previously creating with autospec=false due to the older python versions' bug and those spies had incorrectly typed methods called on them

Should be a very small percentage of users, maybe none, and if this is merged, it would probably be good for those affected to update and have those silent failures fixed.

[nicoddemus]

I see, thanks! I guess we might leave out this from the CHANGELOG then for now, and if somebody is affected by this, we can add a note accordingly.

Thanks again!