def create_stubbed_exception(cls, status_code=500):
    msg = "Expected failure."

    def fake_init_exception(self, code=None, message=None, **kwargs):
        if code is not None:
            if hasattr(self, 'http_status'):
                self.http_status = code
            else:
                self.code = code
        self.message = message or self.__class__.message

        try:
            # Neutron sometimes updates the message with additional
            # information, like a reason.
            self.message = kwargs % self.message
        except Exception:
            pass  # We still have the main error message.

    def fake_str(self):
        return str(self.message)

    def fake_unicode(self):
        return six.text_type(self.message)

    cls.__init__ = fake_init_exception
    cls.__str__ = fake_str
    cls.__unicode__ = fake_unicode
    cls.silence_logging = True
    return cls(status_code, msg)
dataset/ETHPy150Open openstack/horizon/openstack_dashboard/test/test_data/exceptions.py/create_stubbed_exception/swapped operands of `%`