@Test
  public void testMergeSchemaTree() throws Exception {
    ClusterSchemaTree schemaTree = new ClusterSchemaTree();
    for (ClusterSchemaTree tree : generateSchemaTrees()) {
      schemaTree.mergeSchemaTree(tree);
    }

    testSchemaTree(schemaTree.getRoot());
  }
Generate the following tree: root.sg.d1.s1, root.sg.d1.s2(status) root.sg.d2.s1,
root.sg.d2.s2(status) root.sg.d2.a.s1, root.sg.d2.a.s2(status)
iotdb-core/datanode/src/test/java/org/apache/iotdb/db/queryengine/common/schematree/ClusterSchemaTreeTest.java