def test_key_validation_raises_exception_if_the_key_is_not_in_every_elem(self):
iterable = [{'key': 5}, {'key2': 1}, {'key': 2}]
key = 'key'
exc = None
try:
validate_key(iterable, key)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(str(exc), 'Element without expected key. Cannot compare.')
def test_key_validation_raises_exception_if_key_is_not_string(self):
iterable = [{'key': 5}, {'key': 7}, {'key': 2}]
key = 5
exc = None
try:
validate_key(iterable, key)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(str(exc), 'Key must be of type "string".')
def test_key_validation_raises_exception_if_elems_are_dictionaries_but_key_is_none(self):
iterable = [{'key': 5}, {'key': 1}, {'key': 2}]
key = None
exc = None
try:
validate_key(iterable, key)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(str(exc), 'Cannot compare dictionaries without key.')
def test_key_validation_passes_with_correct_input(self):
iterable = [{'key': 5}, {'key': 7}, {'key': 2}]
key = 'key'
validate_key(iterable, key)
def test_key_validation_passes_with_elements_that_are_not_dicts_and_none_key(self): iterable = [4, 5, 3, 1, 2] key = None validate_key(iterable, key)