{
String filterString = "(|(objectClass=*)(objectClass=ldapSubentry))";
InternalClientConnection conn =
InternalClientConnection.getRootConnection();
InternalSearchOperation searchOperation =
conn.processSearch(DN.decode("cn=schema"),
SearchScope.SUBORDINATE_SUBTREE,
SearchFilter.createFilterFromString(filterString));
assertNotNull(searchOperation);
assertEquals(searchOperation.getResultCode(), ResultCode.SUCCESS);
assertTrue(searchOperation.getSearchEntries().isEmpty());
}