def test_ignore_invalid_triggers(self):
a_state = State('A')
transitions = [['a_to_b', 'A', 'B']]
# Exception is triggered by default
b_state = State('B')
m1 = Machine(None, states=[a_state, b_state], transitions=transitions,
initial='B')
with self.assertRaises(MachineError):
m1.a_to_b()
# Exception is suppressed, so this passes
b_state = State('B', ignore_invalid_triggers=True)
m2 = Machine(None, states=[a_state, b_state], transitions=transitions,
initial='B')
m2.a_to_b()
# Set for some states but not others
new_states = ['C', 'D']
m1.add_states(new_states, ignore_invalid_triggers=True)
m1.to_D()
m1.a_to_b() # passes because exception suppressed for D
m1.to_B()
with self.assertRaises(MachineError):
m1.a_to_b()
# Set at machine level
m3 = Machine(None, states=[a_state, b_state], transitions=transitions,
initial='B', ignore_invalid_triggers=True)
m3.a_to_b()
