def test_non_callable(self):
        with pytest.raises(TypeError) as excinfo:
            event.event(123)
        excinfo.match(r"Expected string, callable or None as first argument")

        with pytest.raises(TypeError) as excinfo:
            event.event("name")([])
        excinfo.match(r"Callable must be a function \(`def`\)"
                      r" or coroutine function \(`async def`\)")
def test_none_to_pointer_fields(self):
        class S(Structure):
            _fields_ = [("x", c_int),
                        ("p", POINTER(c_int))]

        s = S()
        s.x = 12345678
        s.p = None
        self.assertEqual(s.x, 12345678)