code: def test_options():
      """General test of option keywords in Ray."""
      import re
  
      from ray._private import ray_option_utils
  
      def f():
          return 1
  
      class A:
          x = 1
  
      task_defaults = {
          k: v.default_value
          for k, v in ray_option_utils.task_options.items()
      }
      task_defaults_for_options = task_defaults.copy()
      task_defaults_for_options.pop("max_calls")
      ray.remote(f).options(**task_defaults_for_options)
      ray.remote(**task_defaults)(f).options(
          **task_defaults_for_options
      )
      with pytest.raises(
          ValueError,
          match=re.escape(
              "Setting 'max_calls' is not supported in '.options()'."
          ),
      ):
          ray.remote(f).options(max_calls=1)
  
      actor_defaults = {
          k: v.default_value
          for k, v in ray_option_utils.actor_options.items()
      }
      actor_defaults_for_options = actor_defaults.copy()
      actor_defaults_for_options.pop("concurrency_groups")
      ray.remote(A).options(**actor_defaults_for_options)
      ray.remote(**actor_defaults)(A).options(
          **actor_defaults_for_options
      )
      with pytest.raises(
          ValueError,
          match=re.escape(
              "Setting 'concurrency_groups' is not supported in '.options()'."
          ),
      ):
          ray.remote(A).options(concurrency_groups=[])
  
      unique_object = type("###", (), {})()
      for k, v in ray_option_utils.task_options.items():
          v.validate(k, v.default_value)
          with pytest.raises(TypeError):
              v.validate(k, unique_object)
  
      for k, v in ray_option_utils.actor_options.items():
          v.validate(k, v.default_value)
          with pytest.raises(TypeError):
              v.validate(k, unique_object)
  
      # test updating each namespace of "_metadata" independently
      assert ray_option_utils.update_options(
          {
              "_metadata": {
                  "ns1": {"a1": 1, "b1": 2, "c1": 3},
                  "ns2": {"a2": 1},
              },
              "num_cpus": 1,
              "xxx": {"x": 2},
              "zzz": 42,
          },
          {
              "_metadata": {"ns1": {"b1": 22}, "ns3": {"b3": 2}},
              "num_cpus": 2,
              "xxx": {"y": 2},
              "yyy": 3,
          },
      ) == {
          "_metadata": {
              "ns1": {"a1": 1, "b1": 22, "c1": 3},
              "ns2": {"a2": 1},
              "ns3": {"b3": 2},
          },
          "num_cpus": 2,
          "xxx": {"y": 2},
          "yyy": 3,
          "zzz": 42,
      }
  
      # test options for other Ray libraries.
      namespace = "namespace"
  
      class mock_options:
          def __init__(self, **options):
              self.options = {"_metadata": {namespace: options}}
  
          def keys(self):
              return ("_metadata",)
  
          def __getitem__(self, key):
              return self.options[key]
  
          def __call__(self, f):
              f._default_options.update(self.options)
              return f
  
      @mock_options(a=1, b=2)
      @ray.remote(num_gpus=2)
      def foo():
          pass
  
      assert foo._default_options == {
          "_metadata": {"namespace": {"a": 1, "b": 2}},
          "max_calls": 1,
          "num_gpus": 2,
      }
  
      f2 = foo.options(
          num_cpus=1, num_gpus=1, **mock_options(a=11, c=3)
      )
  
      # TODO(suquark): The current implementation of `.options()` is so bad that we
      # cannot even access its options from outside. Here we hack the closures to
      # achieve our goal. Need futher efforts to clean up the tech debt.
      assert f2.remote.__closure__[1].cell_contents == {
          "_metadata": {"namespace": {"a": 11, "b": 2, "c": 3}},
          "num_cpus": 1,
          "num_gpus": 1,
      }
  
      class mock_options2(mock_options):
          def __init__(self, **options):
              self.options = {"_metadata": {namespace + "2": options}}
  
      f3 = foo.options(
          num_cpus=1, num_gpus=1, **mock_options2(a=11, c=3)
      )
  
      assert f3.remote.__closure__[1].cell_contents == {
          "_metadata": {
              "namespace": {"a": 1, "b": 2},
              "namespace2": {"a": 11, "c": 3},
          },
          "num_cpus": 1,
          "num_gpus": 1,
      }
  
      with pytest.raises(TypeError):
          # Ensure only a single "**option" per ".options()".
          # Otherwise it would be confusing.
          foo.options(
              num_cpus=1,
              num_gpus=1,
              **mock_options(a=11, c=3),
              **mock_options2(a=11, c=3),
          )
  
imports: import logging
  import os
  import pickle
  import random
  import sys
  import time
  import pytest
  import ray
  import ray.cluster_utils
  from ray._private.test_utils import SignalActor, client_test_enabled, get_error_message, run_string_as_driver
label_desc: Use image node_id 11 for calling a global function with example usage: test_options() and returns: int, str, self, f