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)
class Person_KE(KnowledgeEngine):
@Rule(NOT(ConflictResolver(resolved=L(True))),
AND(Person(name=L("name"), age=C('age')),
Person(name=L("name"), age=N("age"))))
def same_name(self, age):
nonlocal executions
executions.append(age)
class Parent(KnowledgeEngine):
@Rule(Fact(inherited=L(True)))
def inherited(self):
executions.append(2)
@Rule(NOT(Fact(not_inherited=L(True))))
def not_inherited(self):
executions.append(3)
def test_Rule_with_only_one_NOT_match_InitialFact_if_fact_is_not_present():
from pyknow.rule import NOT, Rule
from pyknow.factlist import FactList
from pyknow.fact import Fact, InitialFact, L
from pyknow.match import Capturation
r = Rule(NOT(Fact(something=L(True))))
fl = FactList()
fl.declare(InitialFact())
assert next(r.get_activations(fl, Capturation()), None) is not None
def test_Rule_and_NOT_nesting():
from pyknow.rule import Rule, NOT
from pyknow.factlist import FactList
from pyknow.fact import Fact, InitialFact, L
r = Rule(Fact(a=L(1)), NOT(Fact(b=L(2))))
fl = FactList()
fl.declare(InitialFact())
fl.declare(Fact(a=L(1)))
activations = list(r.get_activations(fl))
assert len(activations) == 1
assert {0, 1} == set(activations[0].facts)
class Parent(KnowledgeEngine):
@Rule(Fact(initial=L(True)))
def shouldnot_run(self):
# pytest.set_trace()
print("Ran")
executions.append(4)
@Rule(Fact(inherited=L(True)))
def inherited(self):
executions.append(2)
@Rule(NOT(Fact(not_inherited=L(True))))
def not_inherited(self):
executions.append(3)
def test_Rule_with_NOT_DEFINED():
from pyknow.rule import Rule, NOT
from pyknow.factlist import FactList
from pyknow.fact import Fact, InitialFact, L, W
r = Rule(Fact(a=L(1)), NOT(Fact(b=W(True))))
fl = FactList()
fl.declare(InitialFact())
fl.declare(Fact(a=L(1)))
activations = r.get_activations(fl)
assert len(list(activations)) == 1
fl.declare(Fact(b=L('SOMETHING')))
activations = r.get_activations(fl)
assert len(list(activations)) == 0
def test_rule_with_NOT_testce():
from pyknow.rule import Rule, NOT
from pyknow.factlist import FactList
from pyknow.fact import Fact, InitialFact, L, T
r = Rule(Fact(a=L(1)), NOT(Fact(b=T(lambda c, x: x.startswith('D')))))
fl = FactList()
fl.declare(InitialFact())
fl.declare(Fact(a=L(1)))
activations = r.get_activations(fl)
assert len(list(activations)) == 1
fl.declare(Fact(b=L('David')))
activations = r.get_activations(fl)
assert len(list(activations)) == 0
fl = FactList()
fl.declare(InitialFact())
fl.declare(Fact(a=L(1)))
fl.declare(Fact(b=L('Penelope')))
activations = r.get_activations(fl)
assert len(list(activations)) == 1
class Person_KE(KnowledgeEngine):
@Rule(Person(name=C("name")),
NOT(Person(surname=V('name'))))
def same_name(self, name):
nonlocal executions
executions.append(name)