Method checkraises

Lib/test/test_userstring.py:29–36

(self, exc, obj, methodname, *args, expected_msg=None)

        )

    def checkraises(self, exc, obj, methodname, *args, expected_msg=None):
        obj = self.fixtype(obj)
        # we don't fix the arguments, because UserString can't cope with it
        with self.assertRaises(exc) as cm:
            getattr(obj, methodname)(*args)
        self.assertNotEqual(str(cm.exception), '')
        if expected_msg is not None:
            self.assertEqual(str(cm.exception), expected_msg)

    def checkcall(self, object, methodname, *args):
        object = self.fixtype(object)