@Test
public void testSetLastModificationTimestamp() {

    S3ChangeLogStore store = new S3ChangeLogStore();
    assertEquals(store.lastModTime, 0);
    
    store.setLastModificationTimestamp("12345");
    assertEquals(store.lastModTime, 12345);
    store.setLastModificationTimestamp(null);
    assertEquals(store.lastModTime, 0);
}