def test_safe_result_disallows_none_result_handler_at_deserialization_time():
schema = SafeResultSchema()
r = SafeResult(value=None, result_handler=None)
serialized = schema.dump(r)
with pytest.raises(marshmallow.exceptions.ValidationError):
schema.load(serialized)
def test_result_allows_none_value():
schema = SafeResultSchema()
r = SafeResult(value=None, result_handler=JSONResultHandler())
handled = schema.load(schema.dump(r))
assert handled.value is None
assert handled.result_handler == JSONResultHandler()