content: import pytest
  
  from dash.exceptions import BackgroundCallbackError
  from dash.dependencies import Input, Output
  from dash._validate import validate_background_callbacks
  
  
  def test_circular_background_callback_progress():
      callback_map = {
          "side": {
              "output": [Output("side-progress", "children")],
              "raw_inputs": [Input("progress", "children")],
          },
          "background": {
              "output": [Output("result", "children")],
              "raw_inputs": [
                  Input("click", "n_clicks"),
                  Input("side-progress", "children"),
              ],
              "background": {"progress": [Output("progress", "children")]},
          },
      }
  
      with pytest.raises(BackgroundCallbackError):
  
          validate_background_callbacks(callback_map)
  