code: def test_properties(self):
      operator = OpsgenieCloseAlertOperator(
          task_id="opsgenie_test_properties_job",
          identifier="id",
          dag=self.dag,
          **self._config,
      )
  
      assert "opsgenie_default" == operator.opsgenie_conn_id
      assert self._config["user"] == operator.user
      assert self._config["note"] == operator.note
      assert self._config["source"] == operator.source
  
file_path: airflow/tests/providers/opsgenie/operators/test_opsgenie.py
imports: from __future__ import annotations
  from unittest import mock
  from airflow.models.dag import DAG
  from airflow.providers.opsgenie.operators.opsgenie import OpsgenieCloseAlertOperator, OpsgenieCreateAlertOperator, OpsgenieDeleteAlertOperator
  from airflow.utils import timezone
label_desc: Use image node_id 3 for calling the TestOpsgenieCloseAlertOperator obj's underlying member method code with example usage: obj.test_properties() without return types