code: def test_schema_fields_external_table_should_execute_successfully(
      self, hook
  ):
      hook.return_value.insert_job.side_effect = [
          MagicMock(job_id=pytest.real_job_id, error_result=False),
          pytest.real_job_id,
      ]
      hook.return_value.generate_job_id.return_value = (
          pytest.real_job_id
      )
      hook.return_value.split_tablename.return_value = (
          PROJECT_ID,
          DATASET,
          TABLE,
      )
      hook.return_value.get_job.return_value.result.return_value = (
          "1",
      )
  
      operator = GCSToBigQueryOperator(
          task_id=TASK_ID,
          bucket=TEST_BUCKET,
          source_objects=TEST_SOURCE_OBJECTS,
          destination_project_dataset_table=TEST_EXPLICIT_DEST,
          write_disposition=WRITE_DISPOSITION,
          schema_fields=SCHEMA_FIELDS_INT,
          external_table=True,
          autodetect=True,
          project_id=JOB_PROJECT_ID,
      )
  
      operator.execute(context=MagicMock())
      hook.return_value.create_empty_table.assert_called_once_with(
          exists_ok=True,
          location=None,
          project_id=JOB_PROJECT_ID,
          table_resource={
              "tableReference": {
                  "projectId": PROJECT_ID,
                  "datasetId": DATASET,
                  "tableId": TABLE,
              },
              "labels": {},
              "externalDataConfiguration": {
                  "autodetect": True,
                  "sourceFormat": "CSV",
                  "sourceUris": [
                      f"gs://{TEST_BUCKET}/{TEST_SOURCE_OBJECTS}"
                  ],
                  "compression": "NONE",
                  "ignoreUnknownValues": False,
                  "csvOptions": {
                      "skipLeadingRows": None,
                      "fieldDelimiter": ",",
                      "quote": None,
                      "allowQuotedNewlines": False,
                      "allowJaggedRows": False,
                      "encoding": "UTF-8",
                  },
                  "schema": {"fields": SCHEMA_FIELDS_INT},
              },
          },
      )
  
imports: from __future__ import annotations
  import json
  from unittest import mock
  from unittest.mock import MagicMock, call
  import pytest
  from google.cloud.bigquery import DEFAULT_RETRY, Table
  from google.cloud.exceptions import Conflict
  from openlineage.client.facet import ColumnLineageDatasetFacet, ColumnLineageDatasetFacetFieldsAdditional, ColumnLineageDatasetFacetFieldsAdditionalInputFields, DocumentationDatasetFacet, ExternalQueryRunFacet, SchemaDatasetFacet, SchemaField, SymlinksDatasetFacet, SymlinksDatasetFacetIdentifiers
  from openlineage.client.run import Dataset
  from airflow.exceptions import AirflowException, TaskDeferred
  from airflow.models import DAG
  from airflow.models.dagrun import DagRun
  from airflow.models.taskinstance import TaskInstance
  from airflow.providers.google.cloud.transfers.gcs_to_bigquery import GCSToBigQueryOperator
  from airflow.providers.google.cloud.triggers.bigquery import BigQueryInsertJobTrigger
  from airflow.utils.timezone import datetime
  from airflow.utils.types import DagRunType
label_desc: Use image node_id 23 for calling the TestGCSToBigQueryOperator obj's underlying member method code with example usage: obj.test_schema_fields_external_table_should_execute_successfully(hook) without return types