def test_conflictsetchange_accepts_rule():
from pyknow.matchers.rete.nodes import ConflictSetNode
from pyknow.rule import Rule
# MUST NOT RAISE
ConflictSetNode(Rule())
with pytest.raises(TypeError):
ConflictSetNode('NOTARULE')
def test_conflictsetchange_valid_adds_to_memory():
from pyknow.fact import Fact
from pyknow.matchers.rete.nodes import ConflictSetNode
from pyknow.matchers.rete.token import Token, TokenInfo
from pyknow.rule import Rule
csn = ConflictSetNode(Rule())
f = Fact(test='data')
f.__factid__ = 1
csn.activate(Token.valid(f, {'mycontextdata': 'data'}))
assert TokenInfo([f], {'mycontextdata': 'data'}) in csn.memory
def test_conflictsetchange_invalid_removes_from_memory():
from pyknow.fact import Fact
from pyknow.matchers.rete.nodes import ConflictSetNode
from pyknow.matchers.rete.token import Token, TokenInfo
from pyknow.rule import Rule
csn = ConflictSetNode(Rule())
csn.memory.append(
TokenInfo([Fact(__factid__=1, test='data')],
{'mycontextdata': 'data'}))
csn.activate(
Token.invalid(Fact(__factid__=1, test='data'),
{'mycontextdata': 'data'}))
assert not csn.memory
def test_conflictsetchange_get_activations_data():
from pyknow.matchers.rete.nodes import ConflictSetNode
from pyknow.matchers.rete.token import Token
from pyknow.rule import Rule
from pyknow.fact import Fact
from pyknow.activation import Activation
rule = Rule()
csn = ConflictSetNode(rule)
csn.activate(Token.valid(Fact(__factid__=1, first=1), {'data': 'test'}))
added, removed = csn.get_activations()
assert len(added) == 1
assert len(removed) == 0
assert list(added)[0].rule is rule
assert Fact(__factid__=1, first=1) in list(added)[0].facts
assert list(added)[0].context == {'data': 'test'}
def test_conflictsetchange_get_activations_data():
from pyknow.matchers.rete.nodes import ConflictSetNode
from pyknow.matchers.rete.token import Token
from pyknow.rule import Rule
from pyknow.fact import Fact
rule = Rule()
csn = ConflictSetNode(rule)
f = Fact(first=1)
f.__factid__ = 1
csn.activate(Token.valid(f, {'data': 'test'}))
added, removed = csn.get_activations()
assert len(added) == 1
assert len(removed) == 0
assert list(added)[0].rule is rule
assert f in list(added)[0].facts
assert list(added)[0].context == {'data': 'test'}
def test_retematcher_changes_return_activations_if_csn():
from pyknow.engine import KnowledgeEngine
from pyknow.fact import Fact
from pyknow.rule import Rule
from pyknow.activation import Activation
from pyknow.matchers.rete.nodes import ConflictSetNode
from pyknow.matchers.rete import ReteMatcher
matcher = ReteMatcher(KnowledgeEngine())
rule = Rule()
csn = ConflictSetNode(rule)
matcher.root_node.add_child(csn, csn.activate)
added, removed = matcher.changes(
adding=[Fact(__factid__=1), Fact(__factid__=2)])
assert len(added) == 2
assert all(isinstance(a, Activation) for a in added)