public static HostRoleCommandStatusSummaryDTO create() {
    return new HostRoleCommandStatusSummaryDTO(
        0L, // skippable,
        0L, // minStartTime,
        0L, // maxEndTime,
        0L, // stageId,
        0L, // aborted,
        0L, // completed,
        0L, // failed,
        0L, // holding,
        0L, // holdingFailed,
        0L, // holdingTimedout,
        0L, // inProgress,
        0L, // pending,
        0L, // queued,
        0L, // timedout
        0L // skippedFailed
    );
  }
For testing, create an empty summary.
ambari-server/src/main/java/org/apache/ambari/server/orm/dao/HostRoleCommandStatusSummaryDTO.java