code: def test_timeout(self):
      short_timeout = 0.050
      long_timeout = short_timeout * 10
  
      future = self.executor.submit(time.sleep, long_timeout)
  
      finished, pending = futures.wait(
          [
              CANCELLED_AND_NOTIFIED_FUTURE,
              EXCEPTION_FUTURE,
              SUCCESSFUL_FUTURE,
              future,
          ],
          timeout=short_timeout,
          return_when=futures.ALL_COMPLETED,
      )
  
      self.assertEqual(
          set(
              [
                  CANCELLED_AND_NOTIFIED_FUTURE,
                  EXCEPTION_FUTURE,
                  SUCCESSFUL_FUTURE,
              ]
          ),
          finished,
      )
      self.assertEqual(set([future]), pending)
  
imports: import sys
  import threading
  import time
  import unittest
  from concurrent import futures
  from test import support
  from .util import CANCELLED_FUTURE, CANCELLED_AND_NOTIFIED_FUTURE, EXCEPTION_FUTURE, SUCCESSFUL_FUTURE, create_executor_tests, setup_module, BaseTestCase, ThreadPoolMixin, ProcessPoolForkMixin, ProcessPoolForkserverMixin, ProcessPoolSpawnMixin
label_desc: Use image node_id 8 for calling the WaitTests obj's underlying member method code with example usage: obj.test_timeout() without return types