test(workspace): add top-down release gates

tests/unit_tests/box/test_box_connector.py

@@ -1,7 +1,8 @@
 from __future__ import annotations
 
+import asyncio
 from types import SimpleNamespace
-from unittest.mock import Mock
+from unittest.mock import AsyncMock, Mock
 
 import pytest
 
@@ -104,3 +105,23 @@ def test_box_runtime_connector_dispose_terminates_subprocess(monkeypatch: pytest
     ctrl_task.cancel.assert_called_once()
     assert connector._handler_task is None
     assert connector._ctrl_task is None
+
+
+@pytest.mark.asyncio
+async def test_box_runtime_connector_heartbeat_failure_requests_reconnect(monkeypatch: pytest.MonkeyPatch):
+    monkeypatch.setattr('langbot.pkg.box.connector._HEARTBEAT_INTERVAL_SEC', 0)
+    disconnected = asyncio.Event()
+    callbacks = []
+
+    async def on_disconnect(connector):
+        callbacks.append(connector)
+        disconnected.set()
+
+    connector = BoxRuntimeConnector(make_app(Mock()), runtime_disconnect_callback=on_disconnect)
+    connector._handler = SimpleNamespace(call_action=AsyncMock(side_effect=TimeoutError('silent runtime')))
+
+    heartbeat = asyncio.create_task(connector._heartbeat_loop())
+    await asyncio.wait_for(disconnected.wait(), timeout=1)
+    await heartbeat
+
+    assert callbacks == [connector]