@Test
public void testSendPacketOut() throws Exception {

    InstanceIdentifier<NodeConnector> ncInsId1 = InstanceIdentifier.builder(Nodes.class).child(Node.class)
            .child(NodeConnector.class, new NodeConnectorKey(new NodeConnectorId("1"))).build();
    packetDispatcher.sendPacketOut(null, new NodeConnectorRef(ncInsId1), new NodeConnectorRef(ncInsId1));
    verify(packetProcessingService, times(1)).transmitPacket(any(TransmitPacketInput.class));
}