public void testUpateAircraftTaxiOutObjectAttributes() {

    // set the attributes to be updated
    //
    AircraftTaxiOut newAircraftTaxiOut = new AircraftTaxiOut();

    // NOTE: Used only since the unit testing is conducted in the VM.
    // Changing
    // this emulates what would happen if the objects were residing on
    // separate
    // machines and thus address spaces.

    newAircraftTaxiOut.setDataObjectUUID(aircraftTaxiOut.getDataObjectUUID());

    newAircraftTaxiOut.setCallSign(callSign);
    newAircraftTaxiOut.setTailNumber(tailNumber);

    newAircraftTaxiOut.setTaxiOutGate(newTaxiOutGate);
    newAircraftTaxiOut.setTaxiOutTimeMSecs(System.currentTimeMillis());

    Set<String> fieldsToUpdate = new HashSet<String>();
    fieldsToUpdate.add(EventAttributeName.taxiOutGate.toString());
    fieldsToUpdate.add(EventAttributeName.taxiOutTimeMSecs.toString());

    try {
      objectService.updateObjectAttributes(
          federationExecutionID, newAircraftTaxiOut, fieldsToUpdate);
    } catch (MuthurException e) {
      fail(e.getLocalizedMessage());
    }

    // will retrieve the updated object from the object service and compare
    // it
    // to the object which should accurately test whether the update was
    // applied

    assertObjectExists(aircraftTaxiOut);
  }
  public void testAddAircraftTaxiOutObject() {

    aircraftTaxiOut = null;

    try {
      aircraftTaxiOut = new AircraftTaxiOut(tailNumber, callSign);
    } catch (MuthurException e) {
      fail(e.getLocalizedMessage());
    }

    aircraftTaxiOut.setTaxiOutTimeMSecs(System.currentTimeMillis());
    aircraftTaxiOut.setTaxiOutGate(taxiOutGate);

    // add the aircraft taxi in

    try {
      objectService.addDataObject(federationExecutionID, aircraftTaxiOut);
    } catch (MuthurException e) {
      fail(e.getLocalizedMessage());
    }

    assertObjectExists(aircraftTaxiOut);
  }
  @Test
  public void testCreateOrUpdateObjectRequestWithAircraftTaxOutObject() {

    AircraftTaxiOut atod = null;

    try {
      atod = new AircraftTaxiOut(tailNumber, acid);
    } catch (Exception e) {
      fail(e.getLocalizedMessage());
    }

    assertNotNull(atod);

    assertEquals(atod.getCallSign(), acid);
    assertEquals(atod.getTailNumber(), tailNumber);
    assertNotNull(atod.getDataObjectUUID());
    assertFalse(atod.getDataObjectUUID().equalsIgnoreCase(""));
    assertTrue(atod.getObjectCreateTimeMSecs() != 0L);

    // gate taxiing from

    atod.setTaxiOutGate("C17");

    // taxi out data

    atod.setTaxiOutTimeMSecs(System.currentTimeMillis() + 30);

    // create a CreateOrUpdateObjectRequest

    CreateOrUpdateObjectRequest cor = new CreateOrUpdateObjectRequest();
    assertNotNull(cor);

    cor.setFederationExecutionHandle(UUID.randomUUID().toString());
    cor.setFederateRegistrationHandle(UUID.randomUUID().toString());
    cor.setFederationExecutionModelHandle(UUID.randomUUID().toString());
    cor.setSourceOfEvent("NexSim");
    cor.setDataObject(atod);

    // serialize the object

    String corAsXML = cor.serialize();

    // do standard validation

    assertNotNull(corAsXML);
    assertFalse(corAsXML.equals(""));

    // create another object from previous object's serialized form

    CreateOrUpdateObjectRequest objectFromXML = new CreateOrUpdateObjectRequest();

    try {
      objectFromXML.initialization(corAsXML);
    } catch (MuthurException e) {
      fail(e.getLocalizedMessage());
    }

    // ensure that the two objects are equal

    assertTrue(objectFromXML.equals(cor));

    // get the serialized version of the new object

    String newObjSerializedAsXML = objectFromXML.serialize();

    assertNotNull(newObjSerializedAsXML);
    assertFalse(newObjSerializedAsXML.equals(""));

    IBaseDataObject bdo = objectFromXML.getDataObject();

    assertNotNull(bdo);
    assertTrue(bdo instanceof AircraftTaxiOut);

    /** Initialize the internal data object from the serialized containing object */
    try {
      bdo.initialization(newObjSerializedAsXML);
    } catch (MuthurException e) {
      fail(e.getLocalizedMessage());
    }

    // check the serialized form of the data object
    String bdoSerialized = bdo.serialize();
    assertNotNull(bdoSerialized);
  }