def test_WHEN_single_predicate_THEN_argument_SHOULD_be_given_to_sub_predicate(self):
for argument_to_predicate in [False, True]:
with self.subTest(argument_to_predicate=argument_to_predicate):
# ARRANGE #
predicate = sut.and_predicate([lambda x: x])
# ACT #
actual = predicate(argument_to_predicate)
# ASSERT #
self.assertEqual(argument_to_predicate, actual)
def test_WHEN_more_than_one_predicate_THEN_argument_SHOULD_be_given_to_each_sub_predicate(
self):
for argument_to_predicate in [False, True]:
with self.subTest(argument_to_predicate=argument_to_predicate):
# ARRANGE #
predicate = sut.and_predicate([lambda x: x, lambda x: x])
# ACT #
actual = predicate(argument_to_predicate)
# ASSERT #
self.assertEqual(argument_to_predicate, actual)
def test_WHEN_more_than_one_predicate_THEN_result_SHOULD_be_combination_of_sub_results(self):
for first_result in [False, True]:
for second_result in [False, True]:
expected_result = first_result and second_result
with self.subTest(first_result=first_result,
second_result=second_result):
# ARRANGE #
predicate = sut.and_predicate([lambda x: first_result,
lambda x: second_result])
# ACT #
actual = predicate('anything')
# ASSERT #
self.assertEqual(expected_result, actual)
def test_WHEN_more_than_one_predicate_THEN_result_SHOULD_be_combination_of_sub_results(
self):
for first_result in [False, True]:
for second_result in [False, True]:
expected_result = first_result and second_result
with self.subTest(first_result=first_result,
second_result=second_result):
# ARRANGE #
predicate = sut.and_predicate(
[lambda x: first_result, lambda x: second_result])
# ACT #
actual = predicate('anything')
# ASSERT #
self.assertEqual(expected_result, actual)
def test_WHEN_single_predicate_THEN_result_SHOULD_be_identical_to_result_of_sub_predicate(
self):
cases = [
(True, lambda x: True),
(False, lambda x: False),
]
for expected_result, sub_predicate in cases:
with self.subTest(expected_result=expected_result):
# ARRANGE #
predicate = sut.and_predicate([sub_predicate])
# ACT #
actual = predicate('anything')
# ASSERT #
self.assertEqual(expected_result, actual)
def test_WHEN_single_predicate_THEN_result_SHOULD_be_identical_to_result_of_sub_predicate(self):
cases = [
(
True,
lambda x: True
),
(
False,
lambda x: False
),
]
for expected_result, sub_predicate in cases:
with self.subTest(expected_result=expected_result):
# ARRANGE #
predicate = sut.and_predicate([sub_predicate])
# ACT #
actual = predicate('anything')
# ASSERT #
self.assertEqual(expected_result, actual)
def test_WHEN_no_sub_predicates_THEN_result_SHOULD_be_true(self):
predicate = sut.and_predicate([])
actual = predicate('anything')
self.assertTrue(actual)
def test_WHEN_no_sub_predicates_THEN_result_SHOULD_be_true(self):
predicate = sut.and_predicate([])
actual = predicate('anything')
self.assertTrue(actual)