Function test_monkeypatch

Lib/test/audit-tests.py:159–188

()

def test_monkeypatch():
    class A:
        pass

    class B:
        pass

    class C(A):
        pass

    a = A()

    with TestHook() as hook:
        # Catch name changes
        C.__name__ = "X"
        # Catch type changes
        C.__bases__ = (B,)
        # Ensure bypassing __setattr__ is still caught
        type.__dict__["__bases__"].__set__(C, (B,))
        # Catch attribute replacement
        C.__init__ = B.__init__
        # Catch attribute addition
        C.new_attr = 123
        # Catch class changes
        a.__class__ = B

    actual = [(a[0], a[1]) for e, a in hook.seen if e == "object.__setattr__"]
    assertSequenceEqual(
        [(C, "__name__"), (C, "__bases__"), (C, "__bases__"), (a, "__class__")], actual
    )


def test_open(testfn):