code: def setUp(self):
      super().setUp()
      self.enter_context(
          test_case_utils.override_env_var("NEW_ENV", "foo")
      )
      self.enter_context(
          test_case_utils.override_env_var("OVERWRITE_ENV", "baz")
      )
      self.enter_context(
          test_case_utils.change_working_dir(self.tmp_dir)
      )
  
imports: import copy
  import os
  import unittest
  import tensorflow
  from tfx import types
  from tfx.types import standard_artifacts
  from tfx.utils import test_case_utils
label_desc: Use image node_id 1 for calling the TempWorkingDirTest obj's underlying member method code with example usage: obj.setUp() without return types