def test_dictionary_conversion():
"""
Test converting dictionaries to tuples and ensuring proper key order.
"""
assert convert_dict_to_tuple({}) == ()
expected = (("a", 1), ("b", 2))
assert convert_dict_to_tuple({"a": 1, "b": 2}) == expected
assert convert_dict_to_tuple({"b": 2, "a": 1}) == expected
def argument_hash(function, *args, **kwargs):
# TODO: Allow usage of a different postprocessor than MD5.
# TODO: Replace `hash` with a safe hashing implementation.
# TODO: Allow recursive conversion of dictionary to tuples, probably do the
# same for lists as well.
arguments = inspect.getcallargs(function, *args, **kwargs)
if 'kwargs' in arguments:
arguments['kwargs'] = convert_dict_to_tuple(arguments['kwargs'])
arguments = convert_dict_to_tuple(arguments)
return md5(':'.join(map(lambda value: str(hash(value)), arguments)))
