code: def test_get_conn(self):
      expected_connection = self.test_hook.get_conn()
      assert expected_connection == self.conn
      assert expected_connection.write_key is not None
      assert expected_connection.write_key == self.expected_write_key
  
file_path: airflow/tests/providers/segment/hooks/test_segment.py
imports: from __future__ import annotations
  from unittest import mock
  import pytest
  from airflow.exceptions import AirflowException
  from airflow.providers.segment.hooks.segment import SegmentHook
label_desc: Use image node_id 2 for calling the TestSegmentHook obj's underlying member method code with example usage: obj.test_get_conn() without return types