@Override
      public boolean evaluate() throws Exception {
        // can potentially observe the parent and both children via this interface.
        return admin.getRegions(tableName)
          .thenApply(val -> val.stream()
            .filter(info -> info.getReplicaId() == RegionInfo.DEFAULT_REPLICA_ID).toList())
          .get(30, TimeUnit.SECONDS).size() == 1;
      }
Test that we can split and merge the quota table given the presence of various configuration
settings.
hbase-server/src/test/java/org/apache/hadoop/hbase/TestSplitMergeQuotaTable.java