Add radio now-playing metadata polling and readonly props

server/tests/test_radio_station_validator.py

@@ -0,0 +1,24 @@
+from __future__ import annotations
+
+from app.client import ClientConnection
+from app.item_service import ItemService
+from app.items.types.radio_station.validator import validate_update
+
+
+class _Ws:
+    pass
+
+
+def test_radio_validator_preserves_readonly_metadata_fields(tmp_path) -> None:
+    service = ItemService(state_file=tmp_path / "items.json")
+    client = ClientConnection(websocket=_Ws(), id="u1", nickname="tester")
+    item = service.default_item(client, "radio_station")
+    item.params["stationName"] = "Original Station"
+    item.params["nowPlaying"] = "Original Song"
+
+    next_params = {**item.params, "stationName": "Injected", "nowPlaying": "Injected Song", "mediaVolume": 60}
+    validated = validate_update(item, next_params)
+
+    assert validated["mediaVolume"] == 60
+    assert validated["stationName"] == "Original Station"
+    assert validated["nowPlaying"] == "Original Song"