P5-mock-monkeypatch

Jul 20, 2023

Monkey patching with test mocking in mind

Mocking is a common tool, especially for testing. By strategically replacing a subroutine, one can isolate segments units of code to test individually. When this is done it is important to know that the mocked sub was actually called and with what arguments it was called.

MockMonkeyPatch injects a subroutine in the place of an existing one. It returns an object by which you can revisit the manner in which the mocked subroutine was called. Further when the object goes out of scope or when the “restore” method is called the original subroutine is replaced.



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