# Path: pyknow/matchers/rete/utils.py
# def prepare_rule(exp):
# def _(exp):
# def _(exp):
# def _(exp):
# def extract_facts(rule):
#     def _extract_facts(ce):
# def generate_checks(fact):
# def wire_rule(rule, alpha_terminals, lhs=None):
#     def _wire_rule(elem):
#     def _(elem):
#     def _(elem):
#     def _(elem):
#     def _(elem):
#     def _(elem):
#     def _(elem):
#     def _(elem):


import pytest
from pyknow.matchers.rete import utils
    from pyknow import Rule, NOT, AND, OR, Fact
    from pyknow.matchers.rete.dnf import dnf
    from pyknow import Rule, InitialFact
    from pyknow import Rule, InitialFact, NOT, Fact
    from pyknow import Rule, InitialFact, NOT, Fact, OR, AND
    from pyknow import Rule, AND, Fact
    from pyknow import Rule, InitialFact, NOT, Fact, OR, AND
    from pyknow import Rule, NOT, AND, OR, Fact
    from pyknow import Rule, KnowledgeEngine
    from pyknow.conditionalelement import ConditionalElement


def test_prepare_rule_is_dnf():

    rule = Rule(AND(Fact(0), NOT(OR(Fact(1), Fact(2)))))(lambda:None)

    assert list(utils.prepare_rule(rule)) == [Fact(0),
                                              NOT(Fact(1)),
                                              NOT(Fact(2))]


def test_prepare_rule_empty():

    rule = Rule()(lambda:None)

    assert list(utils.prepare_rule(rule)) == [InitialFact()]


def test_prepare_rule__rule_starting_with_not():

    rule = Rule(NOT(Fact(1)))(lambda:None)

    assert list(utils.prepare_rule(rule)) == [InitialFact(), NOT(Fact(1))]


def test_prepare_rule__and_starting_with_not():

    rule = Rule(OR(Fact(1), AND(NOT(Fact(2)), Fact(3))))(lambda:None)


# Path: pyknow/matchers/rete/utils.py
# def prepare_rule(exp):
# def _(exp):
# def _(exp):
# def _(exp):
# def extract_facts(rule):
#     def _extract_facts(ce):
# def generate_checks(fact):
# def wire_rule(rule, alpha_terminals, lhs=None):
#     def _wire_rule(elem):
#     def _(elem):
#     def _(elem):
#     def _(elem):
#     def _(elem):
#     def _(elem):
#     def _(elem):
#     def _(elem):


# Path: tests/unit/matchers/rete/test_utils.py
import pytest
from pyknow.matchers.rete import utils
    from pyknow import Rule, NOT, AND, OR, Fact
    from pyknow.matchers.rete.dnf import dnf
    from pyknow import Rule, InitialFact
    from pyknow import Rule, InitialFact, NOT, Fact
    from pyknow import Rule, InitialFact, NOT, Fact, OR, AND
    from pyknow import Rule, AND, Fact
    from pyknow import Rule, InitialFact, NOT, Fact, OR, AND
    from pyknow import Rule, NOT, AND, OR, Fact
    from pyknow import Rule, KnowledgeEngine
    from pyknow.conditionalelement import ConditionalElement



def test_prepare_rule_is_dnf():

    rule = Rule(AND(Fact(0), NOT(OR(Fact(1), Fact(2)))))(lambda:None)

    assert list(utils.prepare_rule(rule)) == [Fact(0),
                                              NOT(Fact(1)),
                                              NOT(Fact(2))]


def test_prepare_rule_empty():

    rule = Rule()(lambda:None)

    assert list(utils.prepare_rule(rule)) == [InitialFact()]


def test_prepare_rule__rule_starting_with_not():

    rule = Rule(NOT(Fact(1)))(lambda:None)

    assert list(utils.prepare_rule(rule)) == [InitialFact(), NOT(Fact(1))]


def test_prepare_rule__and_starting_with_not():

    rule = Rule(OR(Fact(1), AND(NOT(Fact(2)), Fact(3))))(lambda:None)


    assert list(utils.prepare_rule(rule)) == [OR(Fact(1),