### Question:
ClusterStateVerifier { public static boolean verifyByZkCallback(ZkVerifier verifier) { return verifyByZkCallback(verifier, 30000); }  static boolean verifyByPolling(Verifier verifier); static boolean verifyByPolling(Verifier verifier, long timeout); static boolean verifyByPolling(Verifier verifier, long timeout, long period); static boolean verifyByZkCallback(ZkVerifier verifier); static boolean verifyByZkCallback(ZkVerifier verifier, long timeout); static void printUsage(Options cliOptions); static CommandLine processCommandLineArgs(String[] cliArgs); static boolean verifyState(String[] args); static void main(String[] args); static String cluster; static String zkServerAddress; static String help; static String timeout; static String period; static String resources; }### Answer:
@Test public void testEntireCluster() { boolean result = ClusterStateVerifier .verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR, _clusterName)); Assert.assertTrue(result); }