@Test
  public void testNamespace() throws Exception {
    Timing timing = new Timing();
    ChildReaper reaper = null;
    CuratorFramework client =
        CuratorFrameworkFactory.builder()
            .connectString(server.getConnectString())
            .sessionTimeoutMs(timing.session())
            .connectionTimeoutMs(timing.connection())
            .retryPolicy(new RetryOneTime(1))
            .namespace("foo")
            .build();
    try {
      client.start();

      for (int i = 0; i < 10; ++i) {
        client.create().creatingParentsIfNeeded().forPath("/test/" + Integer.toString(i));
      }

      reaper = new ChildReaper(client, "/test", Reaper.Mode.REAP_UNTIL_DELETE, 1);
      reaper.start();

      timing.forWaiting().sleepABit();

      Stat stat = client.checkExists().forPath("/test");
      Assert.assertEquals(stat.getNumChildren(), 0);

      stat = client.usingNamespace(null).checkExists().forPath("/foo/test");
      Assert.assertNotNull(stat);
      Assert.assertEquals(stat.getNumChildren(), 0);
    } finally {
      Closeables.closeQuietly(reaper);
      Closeables.closeQuietly(client);
    }
  }
  @Test
  public void testSomeNodes() throws Exception {

    Timing timing = new Timing();
    ChildReaper reaper = null;
    CuratorFramework client =
        CuratorFrameworkFactory.newClient(
            server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
    try {
      client.start();

      Random r = new Random();
      int nonEmptyNodes = 0;
      for (int i = 0; i < 10; ++i) {
        client.create().creatingParentsIfNeeded().forPath("/test/" + Integer.toString(i));
        if (r.nextBoolean()) {
          client.create().forPath("/test/" + Integer.toString(i) + "/foo");
          ++nonEmptyNodes;
        }
      }

      reaper = new ChildReaper(client, "/test", Reaper.Mode.REAP_UNTIL_DELETE, 1);
      reaper.start();

      timing.forWaiting().sleepABit();

      Stat stat = client.checkExists().forPath("/test");
      Assert.assertEquals(stat.getNumChildren(), nonEmptyNodes);
    } finally {
      Closeables.closeQuietly(reaper);
      Closeables.closeQuietly(client);
    }
  }