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#
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# person obtaining a copy of this software, associated documentation and/or
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def assert_raises(err, fn, *args, **kwargs):
    raised = False
    try:
        fn(*args, **kwargs)
    except err:
        raised = True
    assert raised


def test_set_dict_attr_builtin_extension():
    class MyList(list):
        pass

    lst = MyList()
    assert lst.__dict__ == {}
    lst.__dict__ = {'a': 9}
    assert lst.a == 9
    assert lst.__dict__ == {'a': 9}


def test_get_dict_attr():
    o = object()

    def get_dict_attr():
        return o.__dict__

    def set_dict_attr():
        o.__dict__ = {'a': 10}

    assert_raises(AttributeError, get_dict_attr)
    assert_raises(AttributeError, set_dict_attr)


def test_set_dict_attr():
    class MyClass(object):
        def __init__(self):
            self.a = 9

    m = MyClass()
    assert m.a == 9
    assert m.__dict__ == {'a': 9}
    assert m.a == 9
    m.__dict__ = {'a': 10}
    assert m.__dict__ == {'a': 10}
    assert m.a == 10
    m.d = 20
    assert m.d == 20
    assert "d" in m.__dict__
    assert m.__dict__ == {'a': 10, 'd': 20}


def test_set_attr_builtins():
    lst = list()

    def set_attr():
        lst.a = 10

    assert_raises(AttributeError, set_attr)

    class MyList(list):
        pass

    mlst = MyList()
    mlst.a = 10
    assert mlst.a == 10


def test_set_dict_attr_with_getattr_defined():
    class MyOtherClass(object):
        def __getattribute__(self, item):
            return object.__getattribute__(self, item)

        def __getattr__(self, item):
            if item == "my_attr":
                return 10
            raise AttributeError

    m1 = MyOtherClass()

    def get_non_existing_attr():
        return m1.my_attr_2

    assert_raises(AttributeError, get_non_existing_attr)
    assert m1.my_attr == 10
    assert "my_attr" not in m1.__dict__

    m1.__dict__ = {'d': 10}
    assert m1.my_attr == 10
    assert "my_attr" not in m1.__dict__
    assert m1.d == 10


def test_class_attr():
    class AAA:
        def foo(self):
            assert __class__ == AAA
            assert self.__class__ == AAA

    class BBB:
        pass

    class CCC(AAA):
        def getclass(self):
            return BBB

        __class__ = property(getclass)

        def bar(self):
            assert __class__ == CCC
            assert self.__class__ == BBB

    AAA().foo()
    CCC().bar()

def test_reduce_ex_with_none():
    assert_raises(TypeError, object(), None)