how to use pymock with webtest (http://webtest.pythonpaste.org/en/latest/index.html)

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#new_api.py 

def test():

     return 'test'

----------------------------

#api_controller.py

@expose()

def test_controller(self):

        

        m = mox.Mox()

        m.StubOutWithMock(new_api, 'test')   

        new_api .test(user_id = 2).AndReturn( self.mydata )

 

        m.ReplayAll()

        

        ret = self.app.get( '/api/test' ) 

   

        self.assertTrue( ret.body == 'test' )

 

        m.UnsetStubs()

        m.VerifyAll()

when I run  nosetests 

it not mock def new_api .test   

please help me fix this , thank you very much