code: def test_pickle_idlist():
      schema = fields.Schema(
          pk=fields.ID(stored=True, unique=True),
          text=fields.TEXT(),
          tags=fields.IDLIST(stored=True),
      )
      with TempIndex(schema) as ix:
          assert ix
  
imports: from __future__ import with_statement
  from datetime import datetime, timedelta
  import pytest
  from whoosh import fields, qparser, query
  from whoosh.compat import u, b, xrange
  from whoosh.filedb.filestore import RamStorage
  from whoosh.util import times
  from whoosh.util.testing import TempIndex
label_desc: Use image node_id 27 for calling a global function with example usage: test_pickle_idlist() without return types