code: def test_apply_async(pool):
      def f(arg1, arg2, kwarg1=None, kwarg2=None):
          assert arg1 == 1
          assert arg2 == 2
          assert kwarg1 is None
          assert kwarg2 == 3
          return 1
  
      assert pool.apply_async(f, (1, 2), {"kwarg2": 3}).get() == 1
      with pytest.raises(AssertionError):
          pool.apply_async(
              f,
              (
                  2,
                  2,
              ),
              {"kwarg2": 3},
          ).get()
      with pytest.raises(Exception):
          pool.apply_async(f, (1,)).get()
      with pytest.raises(Exception):
          pool.apply_async(f, (1, 2), {"kwarg1": 3}).get()
  
      # Won't return until the input ObjectRef is fulfilled.
      def ten_over(args):
          signal, val = args
          ray.get(signal.wait.remote())
          return 10 / val
  
      signal = SignalActor.remote()
      result = pool.apply_async(ten_over, ([signal, 10],))
      result.wait(timeout=0.01)
      assert not result.ready()
      with pytest.raises(TimeoutError):
          result.get(timeout=0.01)
  
      # Fulfill the ObjectRef.
      ray.get(signal.send.remote())
      result.wait(timeout=10)
      assert result.ready()
      assert result.successful()
      assert result.get() == 1
  
      signal = SignalActor.remote()
      result = pool.apply_async(ten_over, ([signal, 0],))
      with pytest.raises(ValueError, match="not ready"):
          result.successful()
  
      # Fulfill the ObjectRef with 0, causing the task to fail (divide by zero).
      ray.get(signal.send.remote())
      result.wait(timeout=10)
      assert result.ready()
      assert not result.successful()
      with pytest.raises(ZeroDivisionError):
          result.get()
  
imports: import os
  import sys
  import platform
  import pytest
  import tempfile
  import time
  import random
  from collections import defaultdict
  import queue
  import math
  import ray
  from ray._private.test_utils import SignalActor
  from ray.util.multiprocessing import Pool, TimeoutError, JoinableQueue
  from ray.util.joblib import register_ray
  from joblib import parallel_backend, Parallel, delayed
label_desc: Use image node_id 13 for calling a global function with example usage: test_apply_async(pool) and returns: int, unknown