### Question:
NBIoTDevice extends LPWANDevice { @Override public XBeeProtocol getXBeeProtocol() { return XBeeProtocol.CELLULAR_NBIOT; } NBIoTDevice(String port, int baudRate);  NBIoTDevice(String port, int baudRate, int dataBits, int stopBits, int parity, int flowControl);  NBIoTDevice(String port, SerialPortParameters serialPortParameters);  NBIoTDevice(IConnectionInterface connectionInterface); @Override void open(); @Override XBeeProtocol getXBeeProtocol();  }### Answer:
@Test public void testGetXBeeProtocol() { assertEquals(nbiotDevice.getXBeeProtocol(), XBeeProtocol.CELLULAR_NBIOT); }