def test_notnode_accepts_callable():
from pyknow.matchers.rete.nodes import NotNode
# MUST NOT RAISE
NotNode(lambda l, r: True)
with pytest.raises(TypeError):
NotNode('NONCALLABLE')
def test_notnode_right_activate_valid_empty(TestNode):
from pyknow.matchers.rete.nodes import NotNode
from pyknow.matchers.rete.token import Token
from pyknow.fact import Fact
nn = NotNode(lambda l, r: True)
tn1 = TestNode()
tn2 = TestNode()
nn.add_child(tn1, tn1.activate)
nn.add_child(tn2, tn2.activate)
token = Token.valid(Fact(test='data'))
nn.activate_right(token)
assert not tn1.added
assert not tn2.added
assert token.to_info() in nn.right_memory
def test_notnode_left_activate_valid_non_matching(TestNode):
from pyknow.matchers.rete.nodes import NotNode
from pyknow.matchers.rete.token import Token
from pyknow.fact import Fact
nn = NotNode(lambda l, r: False)
nn.right_memory.append(Token.valid(Fact(test='data1')).to_info())
nn.right_memory.append(Token.valid(Fact(test='data2')).to_info())
tn1 = TestNode()
tn2 = TestNode()
nn.add_child(tn1, tn1.activate)
nn.add_child(tn2, tn2.activate)
token = Token.valid(Fact(test='data'))
nn.activate_left(token)
assert tn1.added == [token]
assert tn2.added == [token]
assert nn.left_memory[token.to_info()] == 0
def test_notnode_right_activate_invalid_match_just_one(TestNode):
from pyknow.matchers.rete.nodes import NotNode
from pyknow.matchers.rete.token import Token
from pyknow.fact import Fact
nn = NotNode(lambda l, r: True)
tn1 = TestNode()
tn2 = TestNode()
nn.add_child(tn1, tn1.activate)
nn.add_child(tn2, tn2.activate)
token = Token.invalid(Fact(test='data'))
nn.right_memory.append(token.to_info())
nn.left_memory[token.to_info()] = 1
nn.activate_right(token)
assert Token.valid(Fact(test='data')) in tn1.added
assert Token.valid(Fact(test='data')) in tn2.added
assert nn.left_memory[token.to_info()] == 0