code: def test_mkdir(self):
      path = pjoin(self.tmp_path, "test-dir/test-dir")
      parent_path = pjoin(self.tmp_path, "test-dir")
  
      self.hdfs.mkdir(path)
      assert self.hdfs.exists(path)
  
      self.hdfs.delete(parent_path, recursive=True)
      assert not self.hdfs.exists(path)
  
imports: import os
  import random
  from io import BytesIO
  from os.path import join
  import numpy
  import pytest
  import pyarrow
  from pyarrow.tests import util
  from pyarrow.tests.parquet.common import _test_dataframe
  from pyarrow.tests.parquet.test_dataset import _test_write_to_dataset_with_partitions, _test_write_to_dataset_no_partitions
  from pyarrow.util import guid
label_desc: Use image node_id 8 for calling the HdfsTestCases obj's underlying member method code with example usage: obj.test_mkdir() without return types