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FysomGlobal does not honor '=' destination
Small snippet to illustrate:
from fysom import FysomGlobal, FysomGlobalMixin
class Model(FysomGlobalMixin, object):
GSM = FysomGlobal(
events=[('test', ('green', 'not_important'), '=')],
initial='green',
state_field='state'
)
def __init__(self):
self.state = None
super(Model, self).__init__()
obj = Model()
print(obj.current) # 'green'
obj.test()
print(obj.current) # '='
I tried to add 2 events with the same name:
events=[('test', 'green', 'green')],
events=[('test', 'not_important', 'not_important'],
but the latter overrides the former, which do not correspond with Fysom behaviour:
from fysom import Fysom
fsm = Fysom(
events=[
('change', 'green', 'red'),
('test', 'green', 'green'),
('test', 'red', 'red')],
initial='green')
print(fsm.current) # green
fsm.test()
print(fsm.current) # green
fsm.change()
print(fsm.current) # red
fsm.test()
print(fsm.current) # red
and
from fysom import FysomGlobal, FysomGlobalMixin, Fysom
class Model(FysomGlobalMixin, object):
GSM = FysomGlobal(
events=[
('change', 'green', 'red'),
('test', 'green', 'green'),
('test', 'red', 'red')],
initial='green',
state_field='state'
)
def __init__(self):
self.state = None
super(Model, self).__init__()
obj = Model()
print(obj.current) # 'green'
obj.test() # 'fysom.FysomError: event test inappropriate in current state green'
print(obj.current)
obj.change()
print(obj.current)
obj.test()
print(obj.current)
So now I forced to create to different events and fire them based on state which defeats the point of using FSM.
The issue isn't just related to the "=' construct. The _map structure for FysomGlobal does not permit the case in Fysom where the same event can trigger multiple destination, source pairs. moznuy's example with two events with the same name is exactly the problem I have. As he says, this is very different behavior from Fysom.