@After
  public void tearDown() throws IOException {
    SeriesReaderTestUtil.tearDown(seqResources, unSeqResources);
    IoTDBDescriptor.getInstance().getConfig().setDataNodeId(dataNodeId);
    TSFileDescriptor.getInstance().getConfig().setMaxTsBlockLineNumber(maxTsBlockLineNumber);
  }
The original data and structure of this test is same as {@link MergeTreeSortOperatorTest}.
iotdb-core/datanode/src/test/java/org/apache/iotdb/db/queryengine/execution/operator/TreeTopKOperatorTest.java