def test_transport_setup(self, unit_write, device, loop): unit = AsyncioTransport(device, loop, callback=mock.Mock()) unit.setup() loop.remove_writer.assert_called_with(device.fd) device.write.assert_called_once(RESET_PACKET) loop.call_later.assert_any_call(mock.ANY, super(AsyncioTransport, unit).write, STATUS_PACKET) unit_write.assert_called_once_with(MODE_PACKET)