code: def test_tmpdir_runs():
      isinstance(hl.tmp_dir(), str)
  
file_path: hail/hail/python/test/hail/test_context.py
imports: from typing import Tuple, Dict, Optional
  import hail
  from hail.utils.java import Env
  from hail.backend.backend import Backend
  from hail.backend.spark_backend import SparkBackend
  from test.hail.helpers import skip_unless_spark_backend, hl_init_for_test, hl_stop_for_test, qobtest, with_flags
label_desc: Use image node_id 4 for calling a global function with example usage: test_tmpdir_runs() without return types