Class Spam

bpython/test/test_simpleeval.py:72–74

    def test_operators_on_suspicious_types(self):
        class Spam(numbers.Number):
            def __add__(inner_self, other):
                self.fail("doing attribute lookup might have side effects")

        with self.assertRaises(ValueError):
            simple_eval("a + 1", {"a": Spam()})