@Override
  public void setLastDirScannerFinishTime(long time) {
    this.lastDirScannerFinishTime = time;
  }
@Test
  public void testSetLastDirScannerFinishTime() throws IOException {
    assertEquals(dataset.getLastDirScannerFinishTime(), 0L);
    dataset.setLastDirScannerFinishTime(System.currentTimeMillis());
    assertNotEquals(0L, dataset.getLastDirScannerFinishTime());
  }