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

The author made a blog post about this problem. I went for the first solution which looks like this:

class UserMock(Mock):
    @property
    def shop(self):
        raise Shop.DoesNotExist()

http://www.voidspace.org.uk/python/weblog/arch_d7_2010_11_20.shtml#e1196