protected long getNumberOfMobFiles(TableName tableName, String family) throws IOException {
    FileSystem fs = FileSystem.get(conf);
    Path dir = MobUtils.getMobFamilyPath(conf, tableName, family);
    FileStatus[] stat = fs.listStatus(dir);
    for (FileStatus st : stat) {
      LOG.debug("MOB Directory content: {}", st.getPath());
    }
    LOG.debug("MOB Directory content total files: {}", stat.length);

    return stat.length;
  }
Call the API for compaction specific to the test set. should not wait for compactions to
finish. may assume compactions are enabled when called.
hbase-server/src/test/java/org/apache/hadoop/hbase/mob/TestMobCompactionWithDefaults.java