I am trying to test a function that is decorated. Is there a way to mock a decorator and test function in isolation, when decorator is already applied?
import mock
def decorator(func):
def wrapper(*args, **kwargs):
return 1
return wrapper
def mocked(func):
def wrapper(*args, **kwargs):
return 2
return wrapper
@decorator
def f():
return 0
with mock.patch('test.decorator') as d:
d.side_effect = mocked
assert f() == 2 # error
There is not a simple solution.
This is a similar question: How to strip decorators from a function in python
You can either modify the original code just for testing, or use something like this library: https://pypi.python.org/pypi/undecorated in order to write a helper function to switch from the original wrapper to the testing wrapper:
from undecorated import undecorated
mocked(undecorated(f))()
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