public void shouldDecrementFromCounter() throws Exception {
JsonLongDocument doc1 = bucket().counter("decr-key", -10, 100, 0);
assertEquals(100L, (long) doc1.content());
JsonLongDocument doc2 = bucket().counter("decr-key", -10, 0, 0);
assertEquals(90L, (long) doc2.content());
JsonLongDocument doc3 = bucket().counter("decr-key", -10, 0, 0);
assertEquals(80L, (long) doc3.content());
assertTrue(doc1.cas() != doc2.cas());