assertEquals(sortByNameAsc + ", " + sortByAssigneeDesc, orderBy);
// extend query by incomplete sorting query (sorting should not change)
sortQuery = taskService.createTaskQuery().orderByCaseExecutionId();
extendedFilter = extendedFilter.extend(sortQuery);
query = extendedFilter.getQuery();
orderBy = query.getOrderBy();
assertEquals(sortByNameAsc + ", " + sortByAssigneeDesc, orderBy);
}