feat: event-basierte Vorhersage via HA-WebSocket\n\n- Entfernt periodisches Prediction-Intervall (60s)\n- Fügt WebSocket-Listener hinzu, der bei jedem State Change sofort evaluiert\n- BehaviorEngine.handle_state_change() identifiziert betroffene Aktoren und löst evaluate() aus\n- Fallback periodische Vorhersage bleibt als Backup\n- pyproject: websockets dependency\n- tests: test_main.py für Event-Listener\n\nCloses #39

tests/test_main.py

@@ -0,0 +1,50 @@
+import asyncio
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+from app.main import _ha_event_listener, lifespan
+
+
+@pytest.mark.asyncio
+async def test_ha_event_listener_processes_state_change() -> None:
+    # Mock settings, store, engine
+    mock_app = MagicMock()
+    mock_app.state.settings = MagicMock()
+    mock_app.state.settings.ha_url = "http://homeassistant:8123"
+    mock_app.state.settings.ha_token = "test-token"
+    mock_engine = MagicMock()
+    mock_engine.handle_state_change = MagicMock()
+    mock_app.state.behavior_engine = mock_engine
+    mock_store = MagicMock()
+    mock_app.state.actuator_store = mock_store
+
+    mock_client = MagicMock()
+
+    # Mock websockets connection and messages
+    mock_ws = AsyncMock()
+    mock_ws.recv.side_effect = [
+        '{"type":"auth_ok"}',  # auth response
+        '{"type":"event","event":{"event_type":"state_changed","entity_id":"light.test","new_state":{"state":"on"}}}',  # event
+        Exception("EOF"),  # break loop
+    ]
+    mock_ws.send.return_value = None
+
+    with patch("websockets.connect", return_value=mock_ws):
+        await _ha_event_listener(mock_app, mock_client)
+
+    mock_engine.handle_state_change.assert_called_once_with("light.test", {"state": "on"})
+
+
+@pytest.mark.asyncio
+async def test_lifespan_starts_event_listener() -> None:
+    # This is a basic smoke test that lifespan creates the expected tasks
+    from fastapi import FastAPI
+
+    app = FastAPI()
+    app.state.settings = MagicMock()
+    app.state.settings.ha_configured = False
+
+    # Should not raise
+    async with lifespan(app):
+        pass