def test_run_deep_calls():
object = A()
@timewinder.step
def a(state, m):
print("in a")
m.foo = "b"
@timewinder.step
def b(state, m):
m.foo = "c"
@timewinder.step
def c(state, m):
m.foo = "end1"
@timewinder.step
def d(state, m):
m.foo = "end2"
alg = timewinder.FuncProcess(
a(object),
b(object),
c(object),
d(object),
)
ev = timewinder.Evaluator(
objects=[object],
threads=[alg],
)
ev.evaluate()
assert ev.stats.states == 5
ev._print_state_space()
def test_overdraft_1():
@timewinder.object
class Account:
def __init__(self, name):
self.name = name
self.acc = 5
alice = Account("alice")
bob = Account("bob")
@timewinder.step
def withdraw(state, sender, amount):
sender.acc = sender.acc - amount
@timewinder.step
def deposit(state, reciever, amount):
reciever.acc = reciever.acc + amount
alg = timewinder.FuncProcess(
withdraw(alice, 3),
deposit(bob, 3),
)
no_overdrafts = timewinder.ForAll(Account, lambda a: a.acc >= 0)
ev = timewinder.Evaluator(
objects=[alice, bob],
threads=[alg],
specs=[no_overdrafts],
)
ev.evaluate()
ev._print_state_space()
assert ev.stats.states == 3
def alg():
return timewinder.FuncProcess(
check_funds(alice),
withdraw(alice),
deposit(bob),
state={"amt": Set(range(1, 6))},
)
def test_overdraft_initial_conditions():
@timewinder.object
class Account:
def __init__(self, name):
self.name = name
self.acc = 5
alice = Account("alice")
bob = Account("bob")
@timewinder.step
def withdraw(state, sender):
sender.acc = sender.acc - state["amt"]
@timewinder.step
def deposit(state, reciever):
reciever.acc = reciever.acc + state["amt"]
alg = timewinder.FuncProcess(
withdraw(alice),
deposit(bob),
state={
"amt": Set(range(1, 7)),
},
)
no_overdrafts = timewinder.ForAll(Account, lambda a: a.acc >= 0)
ev = timewinder.Evaluator(
objects=[alice, bob],
threads=[alg],
specs=[no_overdrafts],
)
got_error = False
try:
ev.evaluate()
except ConstraintError as e:
got_error = True
print(e.name)
print(e.thunk)
assert got_error
assert ev.stats.states == 12