class TestButton(TestCase): """ Test buttons for each state """ # run before each test def setUp(self): self.event = Event() self.button = Button(push=self.event.push, hold=self.event.hold, release=self.event.release) def tearDown(self): """ Prevents further evaluation in timer thread by setting state to RELEASE (initial state) """ self.button.state = State.RELEASE def test_from_init_to_push(self): """ Check transition from INIT to PUSH. Trigger action for PUSH. """ self.button.set_state_push() self.assertEqual(self.button.state, State.PUSH) self.assertEqual(self.event.action, State.PUSH) def test_from_init_to_hold(self): """ Check transition from INIT to HOLD. No action expected, state shall not be updated. """ self.button.set_state_hold() self.assertNotEqual(self.button.state, State.HOLD) self.assertIsNone(self.event.action) def test_from_init_to_release(self): """ Check transition from INIT to RELEASE. No action expected. """ self.button.set_state_release() self.assertEqual(self.button.state, State.RELEASE) self.assertIsNone(self.event.action) def test_from_push_to_push(self): """ Check transition from PUSH to PUSH. This might happen if signals get lost, etc, hence no action expected? """ self.button.state = State.PUSH self.button.set_state_push() self.assertEqual(self.button.state, State.PUSH) self.assertIsNone(self.event.action) def test_from_push_to_hold(self): """ Check transition from PUSH to HOLD. trigger action for HOLD. """ self.button.state = State.PUSH self.button.set_state_hold() self.assertEqual(self.button.state, State.HOLD) self.assertEqual(self.event.action, State.HOLD) def test_from_push_to_release(self): """ Check transition from PUSH to RELEASE. trigger action for RELEASE. """ self.button.state = State.PUSH self.button.set_state_release() self.assertEqual(self.button.state, State.RELEASE) self.assertEqual(self.event.action, State.RELEASE) def test_from_hold_to_push(self): """ Check transition from HOLD to PUSH. This might happen if signals get lost, etc. State transition is not allowed; hence state is not updated and no action is expected. """ self.button.state = State.HOLD self.button.set_state_push() self.assertEqual(self.button.state, State.HOLD) self.assertIsNone(self.event.action) def test_from_hold_to_hold(self): """ Check transition from HOLD to HOLD. This might happen if a button broadcasting state itself on the IBUS, hence action for HOLD is expected. """ self.button.state = State.HOLD self.button.set_state_hold() self.assertEqual(self.button.state, State.HOLD) self.assertEqual(self.event.action, State.HOLD) def test_from_hold_to_release(self): """ Check transition from HOLD to RELEASE. No action is expected - since we have executed an action for HOLD. """ self.button.state = State.HOLD self.button.set_state_release() self.assertEqual(self.button.state, State.RELEASE) self.assertIsNone(self.event.action) def test_from_release_to_push(self): """ Check transition from RELEASE to PUSH. This is the most common case - execute action for PUSH. """ self.button.state = State.RELEASE self.button.set_state_push() self.assertEqual(self.button.state, State.PUSH) self.assertEqual(self.event.action, State.PUSH) def test_from_release_to_hold(self): """ Check transition from RELEASE to HOLD. This might occur if signal for PUSH is lost, but receiving state HOLD from the IBUS. This is an error-state, state transition is not allowed; hence no action shall be executed and state is not updated. """ self.button.state = State.RELEASE self.button.set_state_hold() self.assertEqual(self.button.state, State.RELEASE) self.assertIsNone(self.event.action) def test_from_release_to_release(self): """ Check transition from RELEASE to RELEASE. This is an error-state, and might occur if signal is lost, etc. no action is expected. """ self.button.state = State.RELEASE self.button.set_state_release() self.assertEqual(self.button.state, State.RELEASE) self.assertIsNone(self.event.action)
