code: def testConstructWrapperWithExistingFileDumpRootRaisesException(self):
      file_path = os.path.join(self.session_root, "foo")
      open(file_path, "a").close()  # Create the file
      self.assertTrue(gfile.Exists(file_path))
      self.assertFalse(gfile.IsDirectory(file_path))
      with self.assertRaisesRegex(
          ValueError, "session_root path points to a file"
      ):
          dumping_wrapper.DumpingDebugWrapperSession(
              session.Session(), session_root=file_path
          )
  
imports: import glob
  import os
  import tempfile
  import threading
  from tensorflow.python.client import session
  from tensorflow.python.debug.lib import debug_data
  from tensorflow.python.debug.wrappers import dumping_wrapper
  from tensorflow.python.debug.wrappers import framework
  from tensorflow.python.debug.wrappers import hooks
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.lib.io import file_io
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import state_ops
  from tensorflow.python.ops import variable_v1
  from tensorflow.python.platform import gfile
  from tensorflow.python.platform import googletest
  from tensorflow.python.training import monitored_session
label_desc: Use image node_id 5 for calling the DumpingDebugWrapperSessionTest obj's underlying member method code with example usage: obj.testConstructWrapperWithExistingFileDumpRootRaisesException() without return types