Method validate_comparison

Lib/test/test_collections.py:754–783

(self, instance)

        self.assertNotIsSubclass(C, abc)

    def validate_comparison(self, instance):
        ops = ['lt', 'gt', 'le', 'ge', 'ne', 'or', 'and', 'xor', 'sub']
        operators = {}
        for op in ops:
            name = '__' + op + '__'
            operators[name] = getattr(operator, name)

        class Other:
            def __init__(self):
                self.right_side = False
            def __eq__(self, other):
                self.right_side = True
                return True
            __lt__ = __eq__
            __gt__ = __eq__
            __le__ = __eq__
            __ge__ = __eq__
            __ne__ = __eq__
            __ror__ = __eq__
            __rand__ = __eq__
            __rxor__ = __eq__
            __rsub__ = __eq__

        for name, op in operators.items():
            if not hasattr(instance, name):
                continue
            other = Other()
            op(instance, other)
            self.assertTrue(other.right_side,'Right side not called for %s.%s'
                            % (type(instance), name))

def _test_gen():
    yield