@Test
public void testLastModificationTimestamp() {

    MockZMSFileChangeLogStore fstore = new MockZMSFileChangeLogStore(FSTORE_PATH, null, null);
    ZMSFileChangeLogStoreCommon cstore = new ZMSFileChangeLogStoreCommon(FSTORE_PATH);
    assertNull(cstore.retrieveLastModificationTime());
    final String now = Long.toString(System.currentTimeMillis());
    fstore.setLastModificationTimestamp(now);
    assertEquals(cstore.retrieveLastModificationTime(), now);
    fstore.setLastModificationTimestamp(null);
    assertNull(cstore.retrieveLastModificationTime());
}