text: from __future__ import absolute_import
  
  import billiard.pool
  
  class test_pool:
      def test_raises(self):
          pool = billiard.pool.Pool()
          assert pool.did_start_ok() is True
          pool.close()
          pool.terminate()
  
      def test_timeout_handler_iterates_with_cache(self):
          # Given a pool
          pool = billiard.pool.Pool()
          # If I have a cache containing async results
          cache = {n: pool.apply_async(n) for n in range(4)}
          # And a TimeoutHandler with that cache
          timeout_handler = pool.TimeoutHandler(pool._pool, cache, 0, 0)
          # If I call to handle the timeouts I expect no exception
          next(timeout_handler.handle_timeouts())
  