def test_flatten_dict_weird_cases(self, dictionary):
"""The dictionary, when weird, raises an error."""
with self.assertRaises(NotImplementedError):
utils.flatten_dict(dictionary)
def test_flatten_dict(self, target, dictionary, flattened):
"""The dictionary, regardless of how complex, has its keys flattened."""
assert utils.flatten_dict(dictionary, target=target) == flattened