def test_simple_fair_with_alias(self):
class main(md.Module):
c = md.Var(md.Boolean())
INIT = c
TRANS = (c.next() == ~c)
FAIRNESS = [c, ~c]
model.load(main)
fsm = model.bddModel()
self.assertIsNotNone(fsm)
@alias("EX {child}")
def EX(child):
return Diamond(child)
@alias()
def Reach(target):
return Mu(Variable("W"), Or(target, EX(Variable("W"))))
@alias("And{{{variable} in {elements}}} {body}")
def BigAnd(body, variable, elements):
if len(elements) <= 0:
return MTrue()
else:
element = next(iter(elements))
elembody = body._substitute(variable, element)
elements = elements[1:]
if len(elements) > 1:
return And(elembody, BigAnd(body, variable, elements))
elif len(elements) == 1:
n = next(iter(elements))
nbody = body._substitute(variable, n)
return And(elembody, nbody)
else:
return elembody
@alias(form="fair")
def fair(fsm):
body = EX(Reach(And(Variable("Z"), Variable("fci"))))
return Nu(
Variable("Z"),
BigAnd(body, Variable("fci"), [
POI(Variable("fc%d" % index))
for index in range(len(fsm.fairness_constraints))
]))
# Compute fair
expr = SPOI(fair(fsm))
context = {
Variable("fc%d" % index): constraint
for index, constraint in enumerate(fsm.fairness_constraints)
}
sat = expr.eval(fsm, context=context)
self.assertTrue(fsm.init <= sat)
state = fsm.pick_one_state(sat & fsm.init)
expl = expr.explain(fsm, state, context=context)
self.assertIsNotNone(expl.dot())
def test_one_transition(self):
smvmodel = """
MODULE main
VAR state: {s1, s2};
INIT state = s1
TRANS next(state) = s2
"""
model.load_from_string(smvmodel)
fsm = model.bddModel()
self.assertSetEqual(set(fsm.transitions.keys()), {'time'})
self.assertEqual(fsm.post(fsm.init, transition='time'),
eval_simple_expression(fsm, 'state = s2'))
def test_several_transitions(self):
smvmodel = """
MODULE main
VAR state: {s1, s2};
IVAR transition : {time, knowledge};
INIT state = s1
TRANS case transition = time : next(state) = s2;
transition = knowledge : next(state) = state;
esac
"""
model.load_from_string(smvmodel)
fsm = model.bddModel()
self.assertSetEqual(set(fsm.transitions.keys()), {'time', 'knowledge'})
self.assertEqual(fsm.post(fsm.init, transition='time'),
eval_simple_expression(fsm, 'state = s2'))
self.assertEqual(fsm.post(fsm.init, transition='knowledge'),
eval_simple_expression(fsm, 'state = s1'))
with self.assertRaises(UnknownTransitionError):
fsm.post(fsm.init, 'unknown')
def test_additional_transitions(self):
smvmodel = """
MODULE main
VAR state: {s1, s2};
IVAR transition : {time, knowledge};
INIT state = s1
TRANS case transition = time : next(state) = s2;
transition = knowledge : next(state) = state;
esac
"""
model.load_from_string(smvmodel)
transitions = {'reset': 'next(state) = s1'}
fsm = model.bddModel(transitions=transitions)
self.assertSetEqual(set(fsm.transitions.keys()),
{'time', 'knowledge', 'reset'})
self.assertEqual(fsm.post(fsm.init, 'time'),
eval_simple_expression(fsm, 'state = s2'))
self.assertEqual(fsm.post(fsm.init, 'knowledge'),
eval_simple_expression(fsm, 'state = s1'))
self.assertEqual(fsm.post(fsm.reachable_states, 'reset'),
eval_simple_expression(fsm, 'state = s1'))
def test_inputs(self):
smvmodel = """
MODULE main
VAR state: {s1, s2};
IVAR run: boolean;
INIT state = s1
TRANS next(state) = (run ? s2 : state)
"""
model.load_from_string(smvmodel)
fsm = model.bddModel()
self.assertSetEqual(set(fsm.transitions.keys()), {'time'})
self.assertEqual(
fsm.post(fsm.init, transition='time'),
eval_simple_expression(fsm, 'state = s2 | state = s1'))
run = eval_simple_expression(fsm, "run")
self.assertEqual(fsm.post(fsm.init, inputs=run),
eval_simple_expression(fsm, 'state = s2'))
nrun = eval_simple_expression(fsm, "!run")
self.assertEqual(fsm.post(fsm.init, inputs=nrun),
eval_simple_expression(fsm, 'state = s1'))
def cardgame_post_fair(self):
model.load_from_file("tests/pynusmv_tools/mucalculus/models/"
"cardgame-post-fair.smv")
fsm = model.bddModel()
self.assertIsNotNone(fsm)
return fsm
def cardgame(self):
model.load_from_file(
"tests/pynusmv_tools/mucalculus/models/cardgame.smv")
fsm = model.bddModel()
self.assertIsNotNone(fsm)
return fsm
