code: def testChunkPageIdsEmptyList(self):
      results = scraper._chunk_page_ids([], chunk_size=3)
      self.assertEqual(results, [])
  
imports: from absl import flags
  from absl.testing import absltest
  from absl.testing import flagsaver
  import wikipedia_sourcelist_generator
label_desc: Use image node_id 2 for calling the WikipediaSourcelistGeneratorTests obj's underlying member method code with example usage: obj.testChunkPageIdsEmptyList() without return types