class TestInversion(TestOperatorCommon):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.sut = InversionOperator()
def test_inversion_should_behave_like_evolution_operator(self):
self.operator_executes_with_some_chance_scenario(
self.configuration.operators.inversion.chance, [self.rule_1])
self.operator_raises_exception_on_invalid_arity_scenario(0, 2)
def test_inversion_changes_order_of_right_side_of_the_rule(self):
# Given:
self.randomizer_mock.perform_with_chance.return_value = True
# When/Then:
rule_new, = self.sut.apply(self.service_mock, self.rule_population_mock, self.rule_1)
assert_that(rule_new, is_(equal_to(Rule(Symbol('A'), Symbol('C'), Symbol('B')))))
self.randomizer_mock.perform_with_chance.assert_called_once_with(
self.configuration.operators.inversion.chance)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.sut = InversionOperator()
