code: def test_get_openlineage_default_schema_with_no_schema_set(
      self, mock_get_first, returned_schema, expected_schema
  ):
      connection_kwargs = {
          **BASE_CONNECTION_KWARGS,
          "schema": None,
      }
      with mock.patch.dict(
          "os.environ",
          AIRFLOW_CONN_TEST_CONN=Connection(
              **connection_kwargs
          ).get_uri(),
      ):
          hook = SnowflakeHook(snowflake_conn_id="test_conn")
          mock_get_first.return_value = returned_schema
          assert (
              hook.get_openlineage_default_schema() == expected_schema
          )
  
imports: from __future__ import annotations
  import json
  from copy import deepcopy
  from typing import TYPE_CHECKING, Any
  from unittest import mock
  import pytest
  from cryptography.hazmat.backends import default_backend
  from cryptography.hazmat.primitives import serialization
  from cryptography.hazmat.primitives.asymmetric import rsa
  from airflow.models import Connection
  from airflow.providers.snowflake.hooks.snowflake import SnowflakeHook
label_desc: Use image node_id 19 for calling the TestPytestSnowflakeHook obj's underlying member method code with example usage: obj.test_get_openlineage_default_schema_with_no_schema_set(mock_get_first, returned_schema, expected_schema) without return types