develop: 补齐 integrations 后端适配器单元测试

tests/test_integrations.py

@@ -17,8 +17,6 @@ from fault_log_analyzer.integrations import (
 
 
 class TestElasticsearchSinkIndexName(unittest.TestCase):
-    """ElasticsearchSink 的索引命名逻辑（不依赖 ES 客户端即可测试）。"""
-
     def test_index_name_monthly_rollover(self):
         sink = object.__new__(ElasticsearchSink)
         sink._index_pattern = "hms-fault-log-{yyyy.MM}"
@@ -41,9 +39,6 @@ class TestElasticsearchSinkIndexName(unittest.TestCase):
 
 
 class TestLazyImportBackends(unittest.TestCase):
-    """可选后端依赖（kafka/elasticsearch/pymysql/redis）未安装时，实例化应抛出
-    明确的 RuntimeError，而非影响核心逻辑与单元测试。"""
-
     def _assert_missing_dependency_raises_runtime_error(self, factory):
         with patch("builtins.__import__", side_effect=ImportError("no optional dependency")):
             with self.assertRaises(RuntimeError):