assertTrue(loadProjectionMap.changes() == false);
//check that the stream projection map is null
LOStream stream = (LOStream)lp.getLeaves().get(0);
ProjectionMap streamProjectionMap = stream.getProjectionMap();
assertTrue(streamProjectionMap.changes() == true);
assertTrue(streamProjectionMap.getMappedFields() == null);
//check that removed fields has all the columns from the input load
List<Pair<Integer, Integer>> streamRemovedFields = streamProjectionMap.getRemovedFields();
assertTrue(streamRemovedFields.size() == 2);