Skip to main content

A subclass of MagicMock that copies the arguments

Project description

travis coveralls pypi pyversions womm

MagicMock has problems when used on a function with mutable arguments. This is called out in the documentation:

Another situation is rare, but can bite you, is when your mock is called with mutable arguments. call_args and call_args_list store references to the arguments. If the arguments are mutated by the code under test then you can no longer make assertions about what the values were when the mock was called.

They then go on to propose a workaround, using side_effect, but it’s not very likable. There is also an elegant recipe offered which copies arguments at call-time. It’s simply a subclass of MagicMock which copies the arguments, instead of storing references. I’m not sure why the recipe wasn’t included directly in mock, so here it is as a third-party package.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

copyingmock-0.2.tar.gz (2.0 kB view hashes)

Uploaded Source

Built Distribution

copyingmock-0.2-py2.py3-none-any.whl (3.8 kB view hashes)

Uploaded Python 2 Python 3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page