docstr: A custom assertion to test :func:`parse_event_files_spec` under
  various systems.
  
  Args:
      pathObj: a custom replacement object for `os.path`, typically
        `posixpath` or `ntpath`
      logdir: the string to be parsed by
        :func:`~data_ingester._parse_event_files_spec`
      expected: the expected dictionary as returned by
        :func:`~data_ingester._parse_event_files_spec`
code: def assertPlatformSpecificLogdirParsing(
      self, pathObj, logdir, expected
  ):
      """A custom assertion to test :func:`parse_event_files_spec` under
      various systems.
  
      Args:
          pathObj: a custom replacement object for `os.path`, typically
            `posixpath` or `ntpath`
          logdir: the string to be parsed by
            :func:`~data_ingester._parse_event_files_spec`
          expected: the expected dictionary as returned by
            :func:`~data_ingester._parse_event_files_spec`
      """
  
      with mock.patch("os.path", pathObj):
          self.assertEqual(
              data_ingester._parse_event_files_spec(logdir), expected
          )
  
imports: import ntpath
  import os
  import posixpath
  import time
  from unittest import mock
  from tensorboard import test
  from tensorboard.backend.event_processing import data_ingester
  from tensorboard.compat import tf
label_desc: Use image node_id 1 for calling the ParseEventFilesSpecTest obj's underlying member method code with example usage: obj.assertPlatformSpecificLogdirParsing(pathObj, logdir, expected) without return types