補齊 EventRouter 失敗通知回放

tests/test_event_router.py

@@ -115,3 +115,56 @@ def test_dispatch_dedupes_repeated_event(monkeypatch):
     assert second["deduped"] is True
     assert second["sent"] == 0
     assert len(sent) == 1
+
+
+def test_replay_failed_deliveries_removes_successful_records(tmp_path, monkeypatch):
+    import services.event_router as event_router
+
+    queue_path = tmp_path / "failed.jsonl"
+    queue_path.write_text(
+        json.dumps({
+            "ts": "2026-04-29T00:00:00",
+            "reason": "telegram_delivery_failed",
+            "tier": "L1",
+            "event_key": "Scheduler.Test:test",
+            "event": {"title": "舊告警", "summary": "需要回放"},
+            "message": "queued message",
+            "errors": ["HTTP 500"],
+        }, ensure_ascii=False) + "\n",
+        encoding="utf-8",
+    )
+    monkeypatch.setattr(event_router, "_QUEUE_PATH", str(queue_path))
+    sent = []
+    monkeypatch.setattr(
+        event_router,
+        "send_telegram_with_result",
+        lambda message, **kwargs: sent.append(message) or {"ok": True, "sent": 1, "failed": 0, "chat_ids": [123], "errors": []},
+    )
+
+    result = event_router.replay_failed_deliveries(limit=10)
+
+    assert result == {"attempted": 1, "sent": 1, "failed": 0, "dropped": 0}
+    assert sent == ["queued message"]
+    assert not queue_path.exists()
+
+
+def test_replay_failed_deliveries_keeps_failed_records(tmp_path, monkeypatch):
+    import services.event_router as event_router
+
+    queue_path = tmp_path / "failed.jsonl"
+    queue_path.write_text(
+        json.dumps({"event_key": "Scheduler.Test:test", "event": {"title": "舊告警"}, "message": "queued"}) + "\n",
+        encoding="utf-8",
+    )
+    monkeypatch.setattr(event_router, "_QUEUE_PATH", str(queue_path))
+    monkeypatch.setattr(
+        event_router,
+        "send_telegram_with_result",
+        lambda *args, **kwargs: {"ok": False, "sent": 0, "failed": 1, "chat_ids": [123], "errors": ["HTTP 500"]},
+    )
+
+    result = event_router.replay_failed_deliveries(limit=10)
+
+    assert result["attempted"] == 1
+    assert result["failed"] == 1
+    assert "last_replay_error" in queue_path.read_text(encoding="utf-8")