def test_goto(self):
fsm = Fysom({
'initial': 'green',
'events': [
{'name': 'warn', 'src': 'green', 'dst': 'yellow'},
{'name': 'panic', 'src': 'yellow', 'dst': 'red'},
{'name': 'panic', 'src': 'green', 'dst': 'red'},
{'name': 'calm', 'src': 'red', 'dst': 'yellow'},
{'name': 'clear', 'src': 'yellow', 'dst': 'green'}
]
})
self.assertRaises(MultiplePossibilitesFound, fsm.next)
self.assertEqual('red', fsm.goto('panic'))
def test_no_possibility_for_goto(self):
fsm = Fysom({
'initial': 'green',
'events': [
{'name': 'warn', 'src': 'green', 'dst': 'yellow'},
{'name': 'panic', 'src': 'yellow', 'dst': 'red'},
{'name': 'panic', 'src': 'green', 'dst': 'red'},
# when call panic from green, we go to red, from red we
# should go to yellow, but it is commented and we should
# have a exception
# {'name': 'calm', 'src': 'red', 'dst': 'yellow'},
{'name': 'clear', 'src': 'yellow', 'dst': 'green'}
]
})
self.assertRaises(MultiplePossibilitesFound, fsm.next)
self.assertEqual('red', fsm.goto('panic'))
self.assertRaises(NoPossibilityFound, fsm.goto, 'calm')
