private void assertOnTokenScroll(String queryClause, int expected)
{
Query query = (Query) em.createQuery(queryClause, CouchDBToken.class);
int count = 0;
Iterator<CouchDBToken> tokens = query.iterate();
while (tokens.hasNext())
{
CouchDBToken token = tokens.next();
Assert.assertNotNull(token);
Assert.assertNotNull(token.getClient());