code: def testNumAcceleratorsSuccess(
      self, mock_list_devices, mock_eager_list_devices
  ):
      devices = [
          context.LogicalDevice(
              "/job:tpu_worker/task:0/device:TPU:0", "TPU"
          ),
          context.LogicalDevice(
              "/job:tpu_worker/task:1/device:TPU:1", "TPU"
          ),
          context.LogicalDevice(
              "/job:tpu_worker/task:2/device:TPU:0", "TPU"
          ),
          context.LogicalDevice(
              "/job:tpu_worker/task:3/device:TPU:1", "TPU"
          ),
          context.LogicalDevice(
              "/job:tpu_worker/task:0/device:TPU:4", "TPU"
          ),
          context.LogicalDevice(
              "/job:tpu_worker/task:1/device:TPU:5", "TPU"
          ),
          context.LogicalDevice(
              "/job:tpu_worker/task:2/device:TPU:4", "TPU"
          ),
          context.LogicalDevice(
              "/job:tpu_worker/task:3/device:TPU:5", "TPU"
          ),
      ]
      device_list = [
          session._DeviceAttributes(d.name, d.device_type, 1024, 0)
          for d in devices
      ]
      mock_eager_list_devices.return_value = devices
      mock_list_devices.return_value = device_list
  
      tpu_map = {
          "projects/test-project/locations/us-central1-c/nodes/test-tpu-1": {
              "state": "READY",
              "health": "HEALTHY",
              "networkEndpoints": [
                  {
                      "ipAddress": "10.2.3.4",
                      "port": 8470,
                  },
                  {
                      "ipAddress": "10.2.3.5",
                      "port": 8470,
                  },
                  {
                      "ipAddress": "10.2.3.6",
                      "port": 8470,
                  },
                  {
                      "ipAddress": "10.2.3.7",
                      "port": 8470,
                  },
              ],
          }
      }
  
      cluster_resolver = resolver.TPUClusterResolver(
          project="test-project",
          zone="us-central1-c",
          tpu="test-tpu-1",
          service=self.mock_service_client(tpu_map=tpu_map),
      )
      self.assertEqual(cluster_resolver.num_accelerators(), {"TPU": 2})
  
imports: import os
  import six
  from six.moves.urllib.error import URLError
  from tensorflow.core.protobuf.tpu import topology_pb2
  from tensorflow.python.client import session
  from tensorflow.python.distribute.cluster_resolver.tpu import tpu_cluster_resolver
  from tensorflow.python.eager import context
  from tensorflow.python.framework import config
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.platform import test
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.training import server_lib
  from tensorflow.python.util import compat
label_desc: Use image node_id 27 for calling the TPUClusterResolverTest obj's underlying member method code with example usage: obj.testNumAcceleratorsSuccess(mock_list_devices, mock_eager_list_devices) without return types