Python: Mock side_effect on object attribute

Question

Is it possible to have a side_effect on a property? If I look at the Mock documentation it seems it's only possible on object methods.

I am trying to test the following:

def get_object(self):      try:         return self.request.user.shop     except Shop.DoesNotExist:         return None 

I want Shop to raise a DoesNotExist exception.

Guess maybe I wasn't clear enough but I am talking about the voidspace mock library.

http://www.voidspace.org.uk/python/mock/index.html

Answer 1

It's worth noting that there is now the PropertyMock class:

>>> m = MagicMock() >>> p = PropertyMock(side_effect=ValueError) >>> type(m).foo = p >>> m.foo Traceback (most recent call last): .... ValueError 

That example was taken from the official site.