def test_agenda_has_activations():
""" Agenda object has activations property """
from pyknow.agenda import Agenda
from collections import deque
assert hasattr(Agenda(), "activations")
assert isinstance(Agenda().activations, deque)
def test_Depth_update_agenda_different_salience():
from random import shuffle
from pyknow.strategies import Depth
from pyknow.activation import Activation
from pyknow.rule import Rule
from pyknow.agenda import Agenda
act1 = Activation(rule=Rule(salience=1), facts=(1, ))
act2 = Activation(rule=Rule(salience=2), facts=(2, ))
act3 = Activation(rule=Rule(salience=3), facts=(3, ))
act4 = Activation(rule=Rule(salience=4), facts=(4, ))
acts = [act1, act2, act3, act4]
shuffle(acts)
st = Depth()
a = Agenda()
for act in acts:
st.update_agenda(a, [act])
order = list(a.activations)
assert (order.index(act4) < order.index(act3) < order.index(act2) <
order.index(act1))
def test_Depth_update_agenda_asertion_order_affects_agenda_order_1():
from pyknow.strategies import Depth
from pyknow.activation import Activation
from pyknow.rule import Rule
from pyknow.agenda import Agenda
act1 = Activation(rule=Rule(), facts=(1, ))
act2 = Activation(rule=Rule(), facts=(2, ))
first = {act1, act2}
act3 = Activation(rule=Rule(), facts=(3, ))
act4 = Activation(rule=Rule(), facts=(4, ))
second = {act3, act4}
a = Agenda()
st = Depth()
st.update_agenda(a, first)
st.update_agenda(a, second)
left, right = set(list(a.activations)[:2]), set(list(a.activations)[2:])
assert left == second
assert right == first
def reset(self, **kwargs):
"""
Performs a reset as per CLIPS behaviour (resets the
agenda and factlist and declares InitialFact())
Any keyword argument passed to `reset` will be passed to @DefFacts
which have those arguments on their signature.
.. note:: If persistent facts have been added, they'll be
re-declared.
"""
self.agenda = Agenda()
self.facts = FactList()
self.matcher.reset()
deffacts = []
for deffact in self.get_deffacts():
signature = inspect.signature(deffact)
if not any(p.kind == inspect.Parameter.VAR_KEYWORD
for p in signature.parameters.values()):
# There is not **kwargs defined. Pass only the defined
# names.
args = set(signature.parameters.keys())
deffacts.append(
deffact(**{k: v
for k, v in kwargs.items() if k in args}))
else:
deffacts.append(deffact(**kwargs))
# Declare all facts yielded by deffacts
self.__declare(*chain.from_iterable(deffacts))
self.running = False
def __init__(self):
self.context = Context()
self._fixed_facts = []
self.facts = FactList()
self.running = False
self.agenda = Agenda()
self.strategy = self.__strategy__()
self._parent = False
self.shared_attributes = {}
def test_DepthStrategy_update_agenda_no_facts_returns_empty_agenda():
from pyknow.strategies import DepthStrategy
from pyknow.agenda import Agenda
st = DepthStrategy()
a = Agenda()
st.update_agenda(a, [], [])
assert not a.activations
def test_agenda_get_next():
"""
Agenda has a get_next method that gets from activations and inserts
into executed
"""
from pyknow.agenda import Agenda
agenda = Agenda()
agenda.activations.append("Foo")
assert agenda.get_next() == "Foo"
assert "Foo" not in agenda.activations
def reset(self):
"""
Performs a reset as per CLIPS behaviour (resets the
agenda and factlist and declares InitialFact())
.. note:: If persistent facts have been added, they'll be
re-declared.
"""
self.agenda = Agenda()
self.facts = FactList()
self.__declare(InitialFact())
self.load_initial_facts()
self.strategy.update_agenda(self.agenda, self.get_activations())
def test_Strategy_update_agenda_update_executed(strategy):
from pyknow import strategies
from pyknow.activation import Activation
from pyknow.rule import Rule
from pyknow.agenda import Agenda
act1 = Activation(rule=Rule(), facts=(1, ))
act2 = Activation(rule=Rule(), facts=(2, ))
st = getattr(strategies, strategy)()
a = Agenda()
a.executed.add(act1)
st.update_agenda(a, [act2])
assert act1 not in a.executed
def test_Depth_update_agenda_activations_to_agenda():
from pyknow.strategies import Depth
from pyknow.activation import Activation
from pyknow.rule import Rule
from pyknow.agenda import Agenda
act1 = Activation(rule=Rule(), facts=(1, ))
act2 = Activation(rule=Rule(), facts=(2, ))
a = Agenda()
st = Depth()
st.update_agenda(a, {act1, act2})
assert act1 in a.activations
assert act2 in a.activations
def __init__(self):
self.running = False
self.facts = FactList()
self.agenda = Agenda()
if (isinstance(self.__matcher__, type)
and issubclass(self.__matcher__, abstract.Matcher)):
self.matcher = self.__matcher__(self)
else:
raise TypeError("__matcher__ must be a subclass of Matcher")
if (isinstance(self.__strategy__, type)
and issubclass(self.__strategy__, abstract.Strategy)):
self.strategy = self.__strategy__()
else:
raise TypeError("__strategy__ must be a subclass of Strategy")
def test_DepthStrategy_update_agenda_asertion_order_affects_agenda_order_3():
"""
From Clips docs on Depth Strategy::
Newly activated rules are placed above all rules of the same salience.
For example, given that facta activates rule1 and rule2 and factb
activates rule3 and rule4, then if facta is asserted before factb, rule3
and rule4 will be above rule1 and rule2 on the agenda. However, the
position of rule1 relative to rule2 and rule3 relative to rule4 will be
arbitrary.
"""
from pyknow.strategies import DepthStrategy
from pyknow.activation import Activation
from pyknow import Rule
from pyknow.agenda import Agenda
from pyknow import Fact
from pyknow.factlist import FactList
fl = FactList()
f1 = Fact(1)
fl.declare(f1)
f2 = Fact(2)
fl.declare(f2)
act1 = Activation(rule=Rule(), facts=(f1, ))
act2 = Activation(rule=Rule(), facts=(f1, ))
act3 = Activation(rule=Rule(), facts=(f2, ))
act4 = Activation(rule=Rule(), facts=(f2, ))
a = Agenda()
st = DepthStrategy()
st.update_agenda(a, [act1, act2, act3, act4], [])
order = list(a.activations)
assert (order.index(act4) > order.index(act1)
and order.index(act4) > order.index(act2))
assert (order.index(act3) > order.index(act1)
and order.index(act3) > order.index(act2))
def reset(self):
"""
Performs a reset as per CLIPS behaviour (resets the
agenda and factlist and declares InitialFact())
.. note:: If persistent facts have been added, they'll be
re-declared.
"""
self.agenda = Agenda()
self.facts = FactList()
self.matcher.reset()
# Declare all deffacts
for deffact in self.get_deffacts():
for fact in deffact():
self.__declare(fact)
self.running = False
def test_DepthStrategy_update_agenda_different_salience():
from random import shuffle
from pyknow.strategies import DepthStrategy
from pyknow.activation import Activation
from pyknow import Rule
from pyknow import Fact
from pyknow.agenda import Agenda
from pyknow.factlist import FactList
flist = FactList()
f1 = Fact(1)
flist.declare(f1)
f2 = Fact(2)
flist.declare(f2)
f3 = Fact(3)
flist.declare(f3)
f4 = Fact(4)
flist.declare(f4)
act1 = Activation(rule=Rule(salience=1), facts=(f1, ))
act2 = Activation(rule=Rule(salience=2), facts=(f2, ))
act3 = Activation(rule=Rule(salience=3), facts=(f3, ))
act4 = Activation(rule=Rule(salience=4), facts=(f4, ))
acts = [act1, act2, act3, act4]
shuffle(acts)
st = DepthStrategy()
a = Agenda()
for act in acts:
st.update_agenda(a, acts, [])
order = list(a.activations)
assert (order.index(act4) < order.index(act3) < order.index(act2) <
order.index(act1))
def test_DepthStrategy_update_agenda_assertion_order_affects_agenda_order_1():
from pyknow.strategies import DepthStrategy
from pyknow.activation import Activation
from pyknow import Rule
from pyknow.agenda import Agenda
from pyknow import Fact
from pyknow.factlist import FactList
fl = FactList()
f1 = Fact(1)
fl.declare(f1)
f2 = Fact(2)
fl.declare(f2)
f3 = Fact(3)
fl.declare(f3)
f4 = Fact(4)
fl.declare(f4)
act1 = Activation(rule=Rule(), facts=(f1, ))
act2 = Activation(rule=Rule(), facts=(f2, ))
first = [act1, act2]
act3 = Activation(rule=Rule(), facts=(f3, ))
act4 = Activation(rule=Rule(), facts=(f4, ))
second = [act3, act4]
a = Agenda()
st = DepthStrategy()
oldact = a.activations
st.update_agenda(a, first, [])
assert list(a.activations) == list(reversed(first))
st.update_agenda(a, second, first)
assert list(a.activations) == list(reversed(second))
def test_DepthStrategy_update_agenda_activations_to_agenda():
from pyknow.strategies import DepthStrategy
from pyknow.activation import Activation
from pyknow import Rule
from pyknow.agenda import Agenda
from pyknow import Fact
from pyknow.factlist import FactList
fl = FactList()
f1 = Fact(1)
fl.declare(f1)
f2 = Fact(2)
fl.declare(f2)
act1 = Activation(rule=Rule(), facts=(f1, ))
act2 = Activation(rule=Rule(), facts=(f2, ))
a = Agenda()
st = DepthStrategy()
st.update_agenda(a, [act1, act2], [])
assert act1 in a.activations
assert act2 in a.activations
def test_agenda_has_executed_set():
""" Agenda object has executed property """
from pyknow.agenda import Agenda
assert hasattr(Agenda(), "executed")
assert isinstance(Agenda().executed, set)
