code: def test_invalid_worker_config(self):
      with self.assertRaisesRegex(
          ValueError, r"Invalid `worker_config`"
      ):
          validate.validate(
              entry_point=None,
              distribution_strategy="auto",
              requirements_txt=None,
              chief_config=machine_config.COMMON_MACHINE_CONFIGS[
                  "K80_1X"
              ],
              worker_config=None,
              worker_count=1,
              entry_point_args=None,
              stream_logs=True,
              docker_image_build_bucket=None,
              called_from_notebook=False,
          )
  
imports: import os
  from absl.testing import absltest
  from tensorflow_cloud.core import machine_config
  from tensorflow_cloud.core import validate
  from tensorflow_cloud.core.tests.unit import constants
label_desc: Use image node_id 11 for calling the TestValidate obj's underlying member method code with example usage: obj.test_invalid_worker_config() without return types