assertThat(keySet).containsExactly(8, 0, 1, 2, 5, 7, 9);

    // 8 expires
    ticker.advance(1, MILLISECONDS);
    assertThat(keySet).containsExactly(0, 1, 2, 5, 7, 9);
  }

  public void testExpirationOrder_write() throws ExecutionException {
    // test lru within a single segment
    FakeTicker ticker = new FakeTicker();
    IdentityLoader<Integer> loader = identityLoader();
    LoadingCache<Integer, Integer> cache =