content: from multiprocessing import Value
  
  from dash import Dash, html, dcc, Input, Output
  
  from flaky import flaky
  
  
  @flaky(max_runs=3)
  def test_rddp001_dependencies_on_components_that_dont_exist(dash_duo):
      app = Dash(__name__, suppress_callback_exceptions=True)
      app.layout = html.Div(
          [dcc.Input(id="input", value="initial value"), html.Div(id="output-1")]
      )
  
      output_1_call_count = Value("i", 0)
  
      @app.callback(Output("output-1", "children"), [Input("input", "value")])
      def update_output(value):
          output_1_call_count.value += 1
          return value
  
      # callback for component that doesn't yet exist in the dom
      # in practice, it might get added by some other callback
      output_2_call_count = Value("i", 0)
  
      @app.callback(Output("output-2", "children"), [Input("input", "value")])
      def update_output_2(value):
          output_2_call_count.value += 1
          return value
  
      dash_duo.start_server(app)
  
      assert dash_duo.find_element("#output-1").text == "initial value"
      assert output_1_call_count.value == 1 and output_2_call_count.value == 0
  
      dash_duo.find_element("#input").send_keys("a")
      assert dash_duo.find_element("#output-1").text == "initial valuea"
  
      assert output_1_call_count.value == 2 and output_2_call_count.value == 0
  
      assert not dash_duo.redux_state_is_loading
  
      assert dash_duo.get_logs() == []
  