protected void setupLiveInstances(int numLiveInstances) {
    // setup liveInstances
    for (int i = 0; i < numLiveInstances; i++) {
      LiveInstance liveInstance = new LiveInstance("localhost_" + i);
      liveInstance.setSessionId("session_" + i);

      Builder keyBuilder = accessor.keyBuilder();
      accessor.setProperty(keyBuilder.liveInstance("localhost_" + i), liveInstance);
    }
  }
  private void prepare(
      String controllerVersion, String participantVersion, String minSupportedParticipantVersion) {
    List<String> instances =
        Arrays.asList("localhost_0", "localhost_1", "localhost_2", "localhost_3", "localhost_4");
    int partitions = 10;
    int replicas = 1;

    // set ideal state
    String resourceName = "testResource";
    ZNRecord record =
        DefaultTwoStateStrategy.calculateIdealState(
            instances, partitions, replicas, resourceName, "MASTER", "SLAVE");
    IdealState idealState = new IdealState(record);
    idealState.setStateModelDefId(StateModelDefinitionId.from("MasterSlave"));

    PropertyKeyBuilder keyBuilder = accessor.keyBuilder();
    accessor.setProperty(keyBuilder.idealStates(resourceName), idealState);

    // set live instances
    record = new ZNRecord("localhost_0");
    if (participantVersion != null) {
      record.setSimpleField(LiveInstanceProperty.HELIX_VERSION.toString(), participantVersion);
    }
    LiveInstance liveInstance = new LiveInstance(record);
    liveInstance.setSessionId("session_0");
    accessor.setProperty(keyBuilder.liveInstance("localhost_0"), liveInstance);
    InstanceConfig config = new InstanceConfig(liveInstance.getInstanceName());
    accessor.setProperty(keyBuilder.instanceConfig(config.getInstanceName()), config);

    if (controllerVersion != null) {
      ((Mocks.MockManager) manager).setVersion(controllerVersion);
    }

    if (minSupportedParticipantVersion != null) {
      manager
          .getProperties()
          .getProperties()
          .put("minimum_supported_version.participant", minSupportedParticipantVersion);
    }
    event.addAttribute("helixmanager", manager);
    runStage(event, new ReadClusterDataStage());
  }