def test_eu_loop():
t = Transition([0], [0])
p = PetriNet([t])
s1 = State([1], p)
prop = EUProposition(TrueProposition(), FalseProposition())
s1.evaluate(prop) # should terminate
assert len(p._states_cache) == 1
def test_eg_loop():
t = Transition([0], [0])
p = PetriNet([t])
s1 = State([1], p)
prop = EGProposition(TrueProposition())
assert s1.evaluate(prop) == True
assert len(p._states_cache) == 1
def test_eu_proposition_2():
t = Transition([0], [1])
p = PetriNet([t])
s1 = State([0,2], p)
prop = EUProposition(LessProposition(NumericExpression(0),
VariableExpression(0)), TrueProposition())
assert s1.evaluate(prop) == True
def test_ex_proposition():
t1 = Transition([0], [1])
t2 = Transition([1], [2])
p = PetriNet([t1, t2])
s1 = State([1,1,0], p)
prop = EXProposition(EqualsProposition(VariableExpression(0), NumericExpression(0)))
assert s1.evaluate(prop) == True
def test_eu_proposition_1():
t = Transition([0], [1])
p = PetriNet([t])
s1 = State([0,2], p)
prop = EUProposition(LessProposition(NumericExpression(0),
VariableExpression(0)), EqualsProposition(VariableExpression(1), NumericExpression(3)))
assert s1.evaluate(prop) == False
def test_dual_loop():
t1 = Transition([0], [1])
t2 = Transition([1], [0])
p = PetriNet([t1, t2])
s1 = State([0, 1], p)
prop = EGProposition(TrueProposition())
assert s1.evaluate(prop) == True
def test_eu_proposition_3():
p = PetriNet([])
s = State([], p)
prop = EUProposition(TrueProposition(), FalseProposition())
assert s.evaluate(prop) == False
def test_petri_net_with_propositions():
t = Transition([0], [1])
p = PetriNet([t])
s1 = State([1,0], p)
assert s1.evaluate(AndProposition(EqualsProposition(VariableExpression(0), NumericExpression(1)),
EqualsProposition(VariableExpression(1), NumericExpression(0))))
def test_eg_five():
t = Transition([0], [1])
p = PetriNet([t])
s1 = State([5,0], p)
prop = EGProposition(LessProposition(NumericExpression(0), VariableExpression(0)))
assert s1.evaluate(prop) == False
def test_mark_continuation_true():
p = TrueProposition()
s1 = State([1])
assert s1.evaluate(p) == True
assert p.label() not in s1.labels
def test_mark_continuation_false():
p = FalseProposition()
s1 = State([1])
assert s1.evaluate(p) == False
assert p.label() not in s1.labels