code: def test_no_tasks(capsys):
      with ProgressBar():
          get_threaded({"x": 1}, "x")
      check_bar_completed(capsys)
  
file_path: dask/dask/diagnostics/tests/test_progress.py
imports: from __future__ import annotations
  from operator import add, mul
  import pytest
  from dask.callbacks import Callback
  from dask.diagnostics import ProgressBar
  from dask.diagnostics.progress import format_time
  from dask.local import get_sync
  from dask.threaded import get
label_desc: Use image node_id 8 for calling a global function with example usage: test_no_tasks(capsys) without return types