}
@Test
public void testSearchHeaderContains() throws Exception {
SearchQuery q2 = new SearchQuery();
q2.andCriteria(SearchQuery.headerContains("Subject", "test"));
Iterator<Long> it4 = index.search(null, mailbox, q2);
assertEquals(1L, it4.next().longValue());
assertEquals(3L, it4.next().longValue());
assertFalse(it4.hasNext());