public void testPreferencesEvents() throws Exception {
    storage.toFolder(true);
    FileUtil.getConfigRoot().addRecursiveListener(new FileListener());
    pref.addNodeChangeListener(new NodeListener());

    String newPath = "a/b/c";
    String[] paths = newPath.split("/");
    FileObject fo = null;
    FileObject fo0 = null;
    for (int i = 0; i < paths.length; i++) {
      String path = paths[i];
      fo = FileUtil.createFolder((fo == null) ? FileUtil.getConfigRoot() : fo, path);
      if (i == 0) {
        fo0 = fo;
      }
      nodeAddedEvent.await();
      assertEquals("Missing node added event", 0, nodeAddedEvent.getCount());
      nodeAddedEvent = new CountDownLatch(1);

      Preferences pref2 = pref.node(fo.getPath());
      pref2.addNodeChangeListener(new NodeListener());
    }

    FileObject fo1 = FileUtil.createData(fo, "a.properties");
    nodeAddedEvent.await();
    assertEquals("Missing node added event", 0, nodeAddedEvent.getCount());

    nodeRemovedEvent = new CountDownLatch(paths.length + 1);
    fo0.delete();
    nodeRemovedEvent.await();
    assertEquals("Missing node removed event", 0, nodeRemovedEvent.getCount());
  }