content: import sys
  from multiprocessing import Lock
  
  import pytest
  
  from tests.background_callback.utils import setup_background_callback_app
  
  
  @pytest.mark.skipif(
      sys.version_info < (3, 7), reason="Python 3.6 long callbacks tests hangs up"
  )
  @pytest.mark.skip(reason="Timeout often")
  def test_lcbc005_long_callback_caching(dash_duo, manager):
      lock = Lock()
  
      with setup_background_callback_app(manager, "app5") as app:
          dash_duo.start_server(app)
          dash_duo.wait_for_text_to_equal("#status", "Progress 2/4", 15)
          dash_duo.wait_for_text_to_equal("#status", "Finished", 15)
          dash_duo.wait_for_text_to_equal("#result", "Result for 'AAA'", 8)
  
          # Update input text box to BBB
          input_ = dash_duo.find_element("#input")
          dash_duo.clear_input(input_)
          for key in "BBB":
              with lock:
                  input_.send_keys(key)
  
          # Click run button and check that status eventually cycles to 2/4
          dash_duo.find_element("#run-button").click()
          dash_duo.wait_for_text_to_equal("#status", "Progress 2/4", 20)
          dash_duo.wait_for_text_to_equal("#status", "Finished", 12)
          dash_duo.wait_for_text_to_equal("#result", "Result for 'BBB'", 8)
  
          # Update input text box back to AAA
          input_ = dash_duo.find_element("#input")
          dash_duo.clear_input(input_)
          for key in "AAA":
              with lock:
                  input_.send_keys(key)
  
          # Click run button and this time the cached result is used,
          # So we can get the result right away
          dash_duo.find_element("#run-button").click()
          dash_duo.wait_for_text_to_equal("#status", "Finished", 8)
          dash_duo.wait_for_text_to_equal("#result", "Result for 'AAA'", 8)
  
          # Update input text box back to BBB
          input_ = dash_duo.find_element("#input")
          dash_duo.clear_input(input_)
          for key in "BBB":
              with lock:
                  input_.send_keys(key)
  
          # Click run button and this time the cached result is used,
          # So we can get the result right away
          dash_duo.find_element("#run-button").click()
          dash_duo.wait_for_text_to_equal("#status", "Finished", 8)
          dash_duo.wait_for_text_to_equal("#result", "Result for 'BBB'", 8)
  
          # Update input text box back to AAA
          input_ = dash_duo.find_element("#input")
          dash_duo.clear_input(input_)
          for key in "AAA":
              with lock:
                  input_.send_keys(key)
  
          # Change cache key
          app._cache_key.value = 1
  
          dash_duo.find_element("#run-button").click()
          dash_duo.wait_for_text_to_equal("#status", "Progress 2/4", 20)
          dash_duo.wait_for_text_to_equal("#status", "Finished", 12)
          dash_duo.wait_for_text_to_equal("#result", "Result for 'AAA'", 8)
  
          assert not dash_duo.redux_state_is_loading
          assert dash_duo.get_logs() == []
  