@pytest.mark.coverage

def test_is_wrapped(function_name):

    wrapped_functions = set('{0}_{1}'.format(ns, member)

                            for ns, members in binding.SIGNATURES.items()

                            for member in members)

    if _is_blacklisted(function_name):

        assert function_name not in wrapped_functions

    else:

        assert function_name in wrapped_functions