@Test(expected = OperationException.class)
public void testNullIpRequired() throws Throwable {

  GeoIpOperation op = setup(Arrays.asList(GeoProperty.LOCATION), true);
  DummpyMapEvent devent = new DummpyMapEvent();
  devent.setField("ip_address", null);
  InternalEvent ievent = new InternalEvent("", null, 0);
  ievent.setEventObj(devent);
  op.perform(ievent);
}