@Test
public void onArpPacketReceivedNullInputTest1() throws Exception {

    ArpPacketReceived arpReceived = new ArpPacketReceivedBuilder().setPacketChain(null).build();
    AddressObserverUsingArp addressOberserverArp = new AddressObserverUsingArp(addressObservationWriterMock);
    addressOberserverArp.onArpPacketReceived(arpReceived);
    verify(addressObservationWriterMock, times(0)).addAddress(any(MacAddress.class), any(IpAddress.class),
            any(NodeConnectorRef.class));
}