def test_initial_substate_as_nameless_object(self):
# To get a nameless state, we must create in isolation, because if in
# a statechart, name for the state would be set.
state_U = State()
# Make a new state, isolated (not in a statechart), and set initial
# state as an object, not a string key.
state_W = State(initial_substate_key=state_U)
self.assertEqual(state_W.initial_substate_key, None)
self.assertEqual(state_W.initial_substate_object, state_U)
def test_initial_state_without_default_state(self):
msg = ("Initial substate is invalid. History state requires the name "
"of a default state to be set.")
state_P = State(name='P')
state_P.InitialSubstate = HistoryState
with self.assertRaises(Exception) as cm:
state_P.init_state()
self.assertEqual(str(cm.exception), msg)
def test_initial_state_without_default_state(self):
msg = ("Initial substate is invalid. History state requires the name "
"of a default state to be set.")
state_P = State(name='P')
state_P.InitialSubstate = HistoryState
with self.assertRaises(Exception) as cm:
state_P.init_state()
self.assertEqual(str(cm.exception), msg)
def test_init_for_unnamed_state(self):
state_O = State()
state_P = State()
state_P.parent_state = state_O
with self.assertRaises(Exception) as cm:
state_P.init_state()
the_exception = cm.exception
self.assertEqual(str(the_exception),
'Cannot init_state() an unnamed state.')
def test_initial_substate_as_object(self):
# state_X is in statechart_2, and is initial substate
self.assertTrue(state_X.is_current_state())
# Make a new state, isolated (not in a statechart), and set initial
# state as an object, not a string key. Test if set as string key.
state_Z = State(initial_substate_key=state_Y)
self.assertEqual(state_Z.initial_substate_key, 'Y')
def test_trying_to_get_relative_path_to_nonparent(self):
nobody = State(name='nobody')
# Note: The test will fail after the parentage is searched all the
# way to the root, and at that point the path will be B.X.
with self.assertRaises(Exception) as cm:
state_X.path_relative_to(nobody)
msg = ("Cannot generate relative path from {0} since it is not a "
"parent state of {1}").format('nobody', 'B.X')
self.assertEqual(str(cm.exception), msg)
def test_create(self):
state_O = State(name='O')
state_P = State(name='P')
self.assertEqual(len(state_O._registered_substates), 0)
state_P.parent_state = state_O
state_P.init_state()
self.assertEqual(len(state_O._registered_substates), 1)
# Nothing should happen if init_state() called again.
state_P.init_state()
self.assertEqual(len(state_O._registered_substates), 1)
def test_init_for_unnamed_state(self):
state_O = State()
state_P = State()
state_P.parent_state = state_O
with self.assertRaises(Exception) as cm:
state_P.init_state()
the_exception = cm.exception
self.assertEqual(str(the_exception),
'Cannot init_state() an unnamed state.')
def test_create(self):
state_O = State(name='O')
state_P = State(name='P')
self.assertEqual(len(state_O._registered_substates), 0)
state_P.parent_state = state_O
state_P.init_state()
self.assertEqual(len(state_O._registered_substates), 1)
# Nothing should happen if init_state() called again.
state_P.init_state()
self.assertEqual(len(state_O._registered_substates), 1)
