@Test
    void testHashCode() {
        Query p = newQuery("?query=foo&type=any");
        Query q = newQuery("?query=foo&type=all");
        assertTrue(p.hashCode() != q.hashCode());
    }
Check query hash function.
Extremely simple for now, will be used for pathological cases.
container-search/src/test/java/com/yahoo/prelude/test/QueryTestCase.java