@Test
  public synchronized void readClusterNodesStatsInfo() throws Exception {
    try {
      Client client = prepareESClientForUnitTest();

      SourceClientESClient tested = new SourceClientESClient(client);

      String info = tested.readClusterNodesStatsInfo(null);
      System.out.println(info);
      assertStartsWith("{\"cluster_name\":\"elasticsearch\",\"nodes\":{", info);

    } finally {
      finalizeESClientForUnitTest();
    }
  }