code: def test_dataset_download(dataset_class):
      dataset_class().download(ignore_cache=True)
  
imports: import pytest
  import tempfile
  import os
  import sys
  import numpy
  from stellargraph.datasets import *
  from urllib.error import URLError
  from stellargraph.datasets.dataset_loader import DatasetLoader
  from urllib.request import urlretrieve
  from unittest.mock import patch
label_desc: Use image node_id 1 for calling a global function with example usage: test_dataset_download(dataset_class) without return types