def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.sut = AggressiveCoverageOperator()
class TestAggressiveCoverageOperator(CoverageOperatorTestCommon):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.sut = AggressiveCoverageOperator()
def setup_system_for_successful_rule_selection(self):
detectors = [Detector((2, 2, 1, 0, 1)), Detector((2, 2, 2, 0, 1))]
selected_detector = detectors[1]
self.environment_mock.get_unsatisfied_detectors.return_value = detectors
self.cyk_service_mock.randomizer.choice.return_value = selected_detector
self.environment_mock.get_detector_symbols.return_value = \
Symbol(hash('A')), Symbol(hash('B'))
self.rule_population_mock.get_random_non_terminal_symbol.return_value = \
Symbol(hash('C'))
return selected_detector
def test_operators_execute_with_some_chance(self):
self.setup_system_for_successful_rule_selection()
self.operator_executes_with_some_chance_scenario()
def test_given_sentence_of_unknown_positivity__coverage_should_not_occur(self):
self.environment_mock.is_sentence_positive.return_value = None
# When:
result = self.sut.cover(self.cyk_service_mock, self.environment_mock,
self.rule_population_mock, self.coordinates)
# Then:
assert_that(result, is_(EmptyProduction(Detector(self.coordinates))))
def test_given_negative_sentence__coverage_should_not_occur(self):
self.environment_mock.is_sentence_positive.return_value = False
# When:
result = self.sut.cover(self.cyk_service_mock, self.environment_mock,
self.rule_population_mock, self.coordinates)
# Then:
assert_that(result, is_(EmptyProduction(Detector(self.coordinates))))
def test_given_positive_sentence__coverage_should_occur(self):
# Given:
selected_detector = self.setup_system_for_successful_rule_selection()
# When:
result = self.sut.cover(
self.cyk_service_mock,
self.environment_mock,
self.rule_population_mock,
selected_detector.coordinates[:2])
# Then:
assert_that(result, is_(Production(
selected_detector,
Rule(Symbol(hash('C')), Symbol(hash('A')), Symbol(hash('B'))))))
self.environment_mock.get_detector_symbols.assert_called_once_with(
selected_detector.coordinates)
def test_given_positive_sentence_but_no_valid_detector_coverage_should_not_occur(self):
# Given:
selected_detector = self.setup_system_for_successful_rule_selection()
self.environment_mock.get_unsatisfied_detectors.return_value = []
# When:
result = self.sut.cover(
self.cyk_service_mock,
self.environment_mock,
self.rule_population_mock,
selected_detector.coordinates)
# Then:
assert_that(result, is_(EmptyProduction(selected_detector)))