Karellen

Karellen is the future of DevOps.

More coming soon.


How to spy on Mock-wrapped method calls in Python

You have a class whose API you want to verify: class Class_A(object): def method_X(self): self.method_Y() def method_Y(self): pass You write the following test fully expecting it to pass. Alas, the method_Y assertion fails. def test_class_a(self): obj = Class_A() mock = MagicMock(spec_set=obj, wraps=obj) mock.method_X() mock.method_Y.assert_called_once_with() This is because the Python Unittest Mock, while wrapping mock.method_X(), Mock … Continue reading “How to spy on Mock-wrapped method calls in Python”

Posted in Hacking, Karellen, Projects, Tutorials | Tagged karellen, mock, python, testing | Leave a comment