@Override
    protected TestResource updateResponse(StackAdvisorRequest request, TestResource response) {
      return response;
    }
Try to retrieve multiple hosts info twice. The inner cache should be populated with first usage for first host (hostName1).
For the next usage with the both hosts handleRequest should be used for second host only.
ambari-server/src/test/java/org/apache/ambari/server/api/services/stackadvisor/commands/StackAdvisorCommandTest.java