old_contents: """Tests for the isort import placement module"""
  from functools import partial
  
  from isort import place, sections
  from isort.settings import Config
  
  
  def test_module(src_path):
      place_tester = partial(place.module, config=Config(src_paths=[src_path]))
      assert place_tester("isort") == sections.FIRSTPARTY
      assert place_tester("os") == sections.STDLIB
      assert place_tester(".deprecated") == sections.LOCALFOLDER
      assert place_tester("__future__") == sections.FUTURE
      assert place_tester("hug") == sections.THIRDPARTY
  
  
  def test_extra_standard_library(src_path):
      place_tester = partial(
          place.module, config=Config(src_paths=[src_path], extra_standard_library=["hug"])
      )
      assert place_tester("os") == sections.STDLIB
      assert place_tester("hug") == sections.STDLIB
  
new_contents: """Tests for the isort import placement module"""
  from functools import partial
  
  from isort import place, sections
  from isort.settings import Config
  
  
  def test_module(src_path):
      place_tester = partial(place.module, config=Config(src_paths=[src_path]))
      assert place_tester("isort") == sections.FIRSTPARTY
      assert place_tester("os") == sections.STDLIB
      assert place_tester(".deprecated") == sections.LOCALFOLDER
      assert place_tester("__future__") == sections.FUTURE
      assert place_tester("hug") == sections.THIRDPARTY
  
  
  def test_extra_standard_library(src_path):
      place_tester = partial(
          place.module, config=Config(src_paths=[src_path], extra_standard_library=["hug"])
      )
      assert place_tester("os") == sections.STDLIB
      assert place_tester("hug") == sections.STDLIB
  
  
  def test_no_standard_library_placement():
      assert place.module_with_reason(
          "pathlib", config=Config(sections=["THIRDPARTY"], default_section="THIRDPARTY")
      ) == ("THIRDPARTY", "Default option in Config or universal default.")
      assert place.module("pathlib") == "STDLIB"
  
subject: Add unit test case for desired placement behavior