def test_handle_write_event_over_os_limit(self): options = DummyOptions() config = DummyPConfig(options, 'test', '/test') process = DummyProcess(config) dispatcher = self._makeOne(process) options.write_accept = 1 dispatcher.input_buffer = 'a' * 50 dispatcher.handle_write_event() self.assertEqual(len(dispatcher.input_buffer), 49) self.assertEqual(options.written[0], 'a')