fix: handle ConnectionRefusedError (#19)

src/bluetooth_adapters/dbus.py

@@ -78,6 +78,17 @@ async def _get_dbus_managed_objects() -> dict[str, Any]:
             "DBus connection broken: %s; try restarting " "`bluetooth` and `dbus`", ex
         )
         return {}
+    except ConnectionRefusedError as ex:
+        if is_docker_env():
+            _LOGGER.debug(
+                "DBus connection refused: %s; try restarting "
+                "`bluetooth`, `dbus`, and finally the docker container",
+                ex,
+            )
+        _LOGGER.debug(
+            "DBus connection refused: %s; try restarting " "`bluetooth` and `dbus`", ex
+        )
+        return {}
     msg = Message(
         destination="org.bluez",
         path="/",

tests/test_init.py

@@ -26,6 +26,36 @@ def __init__(self, *args, **kwargs):
         assert await get_bluetooth_adapters() == []
 
 
+@pytest.mark.asyncio
+async def test_get_bluetooth_adapters_connection_refused():
+    """Test get_bluetooth_adapters with connection refused."""
+
+    class MockMessageBus:
+        def __init__(self, *args, **kwargs):
+            raise ConnectionRefusedError
+
+    with patch("bluetooth_adapters.dbus.MessageBus", MockMessageBus):
+        assert await get_bluetooth_adapters() == []
+
+
+@pytest.mark.asyncio
+async def test_get_bluetooth_adapters_connect_refused_docker():
+    class MockMessageBus:
+        def __init__(self, *args, **kwargs):
+            pass
+
+        async def connect(self):
+            raise ConnectionRefusedError
+
+        async def call(self):
+            return None
+
+    with patch("bluetooth_adapters.dbus.MessageBus", MockMessageBus), patch(
+        "bluetooth_adapters.dbus.is_docker_env", return_value=True
+    ):
+        assert await get_bluetooth_adapters() == []
+
+
 @pytest.mark.asyncio
 async def test_get_bluetooth_adapters_connect_fails():
     class MockMessageBus: