def test_NOT_doesnt_match_if_fact_is_not_present_and_InitialFact_neither():
from pyknow.rule import NOT
from pyknow.factlist import FactList
from pyknow.fact import Fact, InitialFact
r = NOT(Fact(something=True))
fl = FactList()
assert not r.get_activations(fl)
def test_NOT_match_InitialFact_if_fact_is_not_present():
from pyknow.rule import NOT
from pyknow.factlist import FactList
from pyknow.fact import Fact, InitialFact
r = NOT(Fact(something=True))
fl = FactList()
fl.declare(InitialFact())
assert r.get_activations(fl)
