Mock pathc question

[Jean-Michel Pichavant]

----- Mail original -----
> Hi
> I would like to mock patch the attribute 'calc' in the 'Client' class
> (See code below).
> I have 2 unit tests:
> 1) test1 -  that patch an existing instance of 'Client' - it works
> fine.
> 1) test2 -  that tries to patch the 'Client' class. My expectation is
> that after the patching, every instance of 'Client' will be created
> with 'MockClient'. However this is not the case..
> 
> Can you please advice?
> 
> Thanks
> 
> Avishay


One way to do this is to decorate the test2 method, http://www.voidspace.org.uk/python/mock/patch.html.
This way you get rid of all the start/stop boiler-plate, the scope of your patch is the scope of the method.

*code not tested*

class TestIt(unittest.TestCase):
    def setUp(self):
        pass    

    @mock.patch(Calc, MockCalc)
    def test2(self):
        client = Client()
        # result should be 7
        print str(client.add(1,34))
    
    def test3(self):
        client = Client()
        # result should be 35 again
        print str(client.add(1,34)) 

By the way, what is 'mock_play' in your original post, could be the reason why you things did go wrong.

JM


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