code: def test_check_parent_cache_dir_url(spark_test_ctx, caplog):
      def log_warning_occur():
          return "you should specify a dbfs fuse path" in "\n".join(
              [r.message for r in caplog.records]
          )
  
      with mock.patch(
          "petastorm.spark.spark_dataset_converter._is_spark_local_mode"
      ) as mock_is_local:
          mock_is_local.return_value = False
          caplog.clear()
          _check_parent_cache_dir_url("file:/dbfs/a/b")
          assert not log_warning_occur()
          caplog.clear()
          _check_parent_cache_dir_url("file:/a/b")
          assert log_warning_occur()
          mock_is_local.return_value = True
          caplog.clear()
          _check_parent_cache_dir_url("file:/dbfs/a/b")
          assert not log_warning_occur()
          caplog.clear()
          _check_parent_cache_dir_url("file:/a/b")
          assert not log_warning_occur()
  
imports: import os
  import subprocess
  import sys
  import tempfile
  import threading
  import time
  from distutils.version import LooseVersion
  import numpy
  import pyspark
  import pytest
  import py4j
  import tensorflow.compat.v1
  from pyspark.sql.functions import pandas_udf
  from pyspark.sql.types import ArrayType, BinaryType, BooleanType, ByteType, DoubleType, FloatType, IntegerType, LongType, ShortType, StringType, StructField, StructType
  from six.moves.urllib.parse import urlparse
  from petastorm import make_batch_reader
  from petastorm.fs_utils import FilesystemResolver
  from petastorm.spark import SparkDatasetConverter, make_spark_converter, spark_dataset_converter
  from petastorm.spark.spark_dataset_converter import _check_dataset_file_median_size, _check_parent_cache_dir_url, _check_rank_and_size_consistent_with_horovod, _check_url, _get_horovod_rank_and_size, _get_spark_session, _make_sub_dir_url, register_delete_dir_handler, _wait_file_available, _normalize_databricks_dbfs_url
  from unittest import mock
  from petastorm.tests.test_tf_utils import create_tf_graph
label_desc: Use image node_id 28 for calling a global function with example usage: test_check_parent_cache_dir_url(spark_test_ctx, caplog) and returns: unknown