gh-102978: Fix mock.patch function signatures for class and staticmethod decorators by tomasr8 · Pull Request #103228 · python/cpython · GitHub
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Footer
You can’t perform that action at this time.
Closes #102978
As reported in the original issue, unittest.mock.patch does not correctly extract function signatures from methods decorated with @classmethod and @staticmethod when patch is called with autospec=True.
This fix adds a special case to the extraction logic which uses the original decorated function via __func__ to get the correct signature.
I also updated the relevant tests.