code: def test_prediction_client(self, mock_prediction_client):
      client = self.hook.prediction_client  # noqa
      mock_prediction_client.assert_called_once_with(
          credentials=CREDENTIALS, client_info=CLIENT_INFO
      )
  
imports: from __future__ import annotations
  from unittest import mock
  import pytest
  from google.api_core.gapic_v1.method import DEFAULT
  from google.cloud.automl_v1beta1 import AutoMlClient
  from airflow.providers.google.cloud.hooks.automl import CloudAutoMLHook
  from airflow.providers.google.common.consts import CLIENT_INFO
  from tests.providers.google.cloud.utils.base_gcp_mock import mock_base_gcp_hook_no_default_project_id
label_desc: Use image node_id 4 for calling the TestAutoMLHook obj's underlying member method code with example usage: obj.test_prediction_client(mock_prediction_client) without return types