def _units_build_fail(cfg, expected):
with raises(Exception) as got:
builtin.units(cfg)
assert_exception_correct(got.value, expected)
def _units_validate_fail(cfg, meta, expected):
assert builtin.units(cfg)('key', meta) == expected
def _units_good(cfg, meta):
assert builtin.units(cfg)('key', meta) is None