def test_cancel_does_not_invoke_handlers_if_stop_is_set(self):
m = mock.Mock()
h = handler.handler()
h.chain(m)
h.stop_propagation()
h.cancel()
self.assertEqual(0, m.cancel.call_count)
def test_cancel_resets_stop_variable(self):
m = mock.Mock()
h = handler.handler()
h.chain(m)
h.stop_propagation()
h.cancel()
self.assertFalse(h.stop)
def test_stop_propagation_updates_stop_variable(self):
h = handler.handler()
h.stop_propagation()
self.assertTrue(h.stop)
