code: def setup_method(self):
      db.merge_conn(
          Connection(
              conn_id="spark-default",
              conn_type="spark",
              host="yarn://yarn-master",
              extra='{"queue": "root.etl", "deploy-mode": "cluster"}',
          )
      )
      db.merge_conn(
          Connection(
              conn_id="jdbc-default",
              conn_type="postgres",
              host="localhost",
              schema="default",
              port=5432,
              login="user",
              password="supersecret",
              extra='{"conn_prefix":"jdbc:postgresql://"}',
          )
      )
      db.merge_conn(
          Connection(
              conn_id="jdbc-invalid-host",
              conn_type="postgres",
              host="localhost/test",
              schema="default",
              port=5432,
              login="user",
              password="supersecret",
              extra='{"conn_prefix":"jdbc:postgresql://"}',
          )
      )
      db.merge_conn(
          Connection(
              conn_id="jdbc-invalid-schema",
              conn_type="postgres",
              host="localhost",
              schema="default?test=",
              port=5432,
              login="user",
              password="supersecret",
              extra='{"conn_prefix":"jdbc:postgresql://"}',
          )
      )
      db.merge_conn(
          Connection(
              conn_id="jdbc-invalid-extra-conn-prefix",
              conn_type="postgres",
              host="localhost",
              schema="default",
              port=5432,
              login="user",
              password="supersecret",
              extra='{"conn_prefix":"jdbc:mysql://some_host:8085/test?some_query_param=true#"}',
          )
      )
  
file_path: airflow/tests/providers/apache/spark/hooks/test_spark_jdbc.py
imports: from __future__ import annotations
  from unittest.mock import patch
  import pytest
  from airflow.models import Connection
  from airflow.providers.apache.spark.hooks.spark_jdbc import SparkJDBCHook
  from airflow.utils import db
label_desc: Use image node_id 1 for calling the TestSparkJDBCHook obj's underlying member method code with example usage: obj.setup_method() without return types