@After
  public void clearQuotaTable() throws Exception {
    if (TEST_UTIL.getAdmin().tableExists(QuotaUtil.QUOTA_TABLE_NAME)) {
      TEST_UTIL.getAdmin().disableTable(QuotaUtil.QUOTA_TABLE_NAME);
      TEST_UTIL.getAdmin().truncateTable(QuotaUtil.QUOTA_TABLE_NAME, false);
    }
  }
minicluster tests that validate that quota entries are properly set in the quota table
hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/TestQuotaAdmin.java