public void testScanReverseKeysOnly() {
persistence.mutate("A1", Functions.constant("A1".getBytes()));
persistence.mutate("A2", Functions.constant("A2".getBytes()));
persistence.mutate("A3", Functions.constant("A3".getBytes()));
assertEquals(Lists.newArrayList("A3", "A2", "A1"), persistence.keyScanReverse("A", "B", 10));
assertEquals(Lists.newArrayList("A3", "A2"), persistence.keyScanReverse("A", "B", 2));
assertEquals(Lists.newArrayList("A2", "A1"), persistence.keyScanReverse("A", "A3", 5));
}
