code: def test_hadoop_ls_file_that_does_not_exist(self):
      try:
          hl.hadoop_ls("a_file_that_does_not_exist")
      except FileNotFoundError:
          pass
      except FatalError as err:
          assert (
              "FileNotFoundException: file:/io/a_file_that_does_not_exist"
              in err.args[0]
          )
      else:
          assert False
  
imports: import json
  import unittest
  import hail
  from hail.utils import *
  from hail.utils.misc import escape_str, escape_id
  from hail.utils.java import FatalError
  from hail.utils.linkedlist import LinkedList
  from ..helpers import *
label_desc: Use image node_id 12 for calling the Tests obj's underlying member method code with example usage: obj.test_hadoop_ls_file_that_does_not_exist() without return types