Python unit testing: How to monkeypatch and mock methods

Tutorial based on this blog post https://alexmarandon.com/articles/python_mock_gotchas/

Problem statement

Monkeypatching and mocking can be somewhat confusing in python. There is a lack of clear documentation on the topic.

The tests provided should give a complete view of what can and cannot be done.

How to run the tests.

Setup the environmnet

python3 -m venv .venv

source .venv/bin/activate

pip install -r requirements.txt

How to run the tests e.g

pytest test_method_call.py