}

  public void testSetRefresh() {
    long duration = 42;
    TimeUnit unit = SECONDS;
    LocalCache<Object, Object> map =
        makeLocalCache(createCacheBuilder().refreshAfterWrite(duration, unit));
    assertEquals(unit.toNanos(duration), map.refreshNanos);
  }

  public void testLongAsyncRefresh() throws Exception {
    FakeTicker ticker = new FakeTicker();