def METHOD_NAME(self):
    myCallback = module.generateDefaultCallback()
    myCallback("", "test message1")
    myCallback("", "test message2")
    myCallback("", "test message3")
    myCallback("", "test message4")
    self.assertEqual(myCallback.get(), "test message1")
    self.assertEqual(myCallback.get(), "test message2")
    self.assertEqual(myCallback.get(), "test message3")
    self.assertEqual(myCallback.get(), "test message4")
    self.assertRaises(queue.Empty, myCallback.get)