code: def test_process_spark_submit_log_k8s_spark_3(self):
      # Given
      hook = SparkSubmitHook(conn_id="spark_k8s_cluster")
      log_lines = ["exit code: 999"]
  
      # When
      hook._process_spark_submit_log(log_lines)
  
      # Then
      assert hook._spark_exit_code == 999
  
imports: from __future__ import annotations
  import os
  from io import StringIO
  from unittest.mock import call, patch
  import pytest
  from airflow.exceptions import AirflowException
  from airflow.models import Connection
  from airflow.providers.apache.spark.hooks.spark_submit import SparkSubmitHook
  from airflow.utils import db
label_desc: Use image node_id 29 for calling the TestSparkSubmitHook obj's underlying member method code with example usage: obj.test_process_spark_submit_log_k8s_spark_3() without return types