content: import itertools
  import time
  import flask
  import pytest
  
  from dash import Dash, html, dcc, Input, Output
  
  DELAY_TIME = 0.2
  
  routes = [
      "layout",
      "dependencies",
      "update-component",
      "_config"
      # routes and component-suites
      # are other endpoints but are excluded to speed up tests
  ]
  
  permuted_strs = [
      ",".join(endpoints) for endpoints in itertools.permutations(routes, len(routes))
  ]
  
  
  @pytest.mark.parametrize("permuted_str", permuted_strs)
  def test_rdrc001_race_conditions(dash_duo, permuted_str):
      endpoints = permuted_str.split(",")
      app = Dash(__name__)
      app.layout = html.Div(
          [
              html.Div("Hello world", id="output"),
              dcc.Input(id="input", value="initial value"),
          ]
      )
  
      @app.callback(Output("output", "children"), Input("input", "value"))
      def update(value):
          return value
  
      def delay():
          for i, route in enumerate(endpoints):
              if route in flask.request.path:
                  time.sleep((DELAY_TIME * i) + DELAY_TIME)
  
      app.server.before_request(delay)
      dash_duo.start_server(app)
  
      dash_duo.wait_for_text_to_equal(
          "#output", "initial value", timeout=DELAY_TIME * (len(endpoints) + 3) + 3
      )
  
      assert not dash_duo.get_logs()
  