code: def test_dddo001_dynamic_options(dash_dcc):
      dropdown_options = [
          {"label": "New York City", "value": "NYC"},
          {"label": "Montreal", "value": "MTL"},
          {"label": "San Francisco", "value": "SF"},
      ]
  
      app = Dash(__name__)
      app.layout = dcc.Dropdown(id="my-dynamic-dropdown", options=[])
  
      @app.callback(
          Output("my-dynamic-dropdown", "options"),
          [Input("my-dynamic-dropdown", "search_value")],
      )
      def update_options(search_value):
          if not search_value:
              raise PreventUpdate
          return [
              o for o in dropdown_options if search_value in o["label"]
          ]
  
      dash_dcc.start_server(app)
  
      # Get the inner input used for search value.
      input_ = dash_dcc.find_element("#my-dynamic-dropdown input")
  
      # Focus on the input to open the options menu
      input_.send_keys("x")
  
      # No options to be found with `x` in them, should show the empty message.
      dash_dcc.wait_for_text_to_equal(
          ".Select-noresults", "No results found"
      )
  
      input_.clear()
      input_.send_keys("o")
  
      options = dash_dcc.find_elements(
          "#my-dynamic-dropdown .VirtualizedSelectOption"
      )
  
      # Should show all options.
      assert len(options) == 3
  
      # Searching for `on`
      input_.send_keys("n")
  
      options = dash_dcc.find_elements(
          "#my-dynamic-dropdown .VirtualizedSelectOption"
      )
  
      assert len(options) == 1
      print(options)
      assert options[0].text == "Montreal"
  
      assert dash_dcc.get_logs() == []
  
imports: import time
  from selenium.webdriver.common.keys import Keys
  from dash import Dash, Input, Output, dcc, html
  from dash.exceptions import PreventUpdate
label_desc: Use image node_id 1 for calling a global function with example usage: test_dddo001_dynamic_options(dash_dcc) and returns: unknown