Handle WebsocketConnectionError during mqtt auto reconnect

followup to #133610 to handle the exception in the auto reconnect
path as well

fixes #132985

homeassistant/components/mqtt/client.py

@@ -695,12 +695,15 @@ def _async_cancel_reconnect(self) -> None:
 
     async def _reconnect_loop(self) -> None:
         """Reconnect to the MQTT server."""
+        # pylint: disable-next=import-outside-toplevel
+        import paho.mqtt.client as mqtt
+
         while True:
             if not self.connected:
                 try:
                     async with self._connection_lock, self._async_connect_in_executor():
                         await self.hass.async_add_executor_job(self._mqttc.reconnect)
-                except OSError as err:
+                except (OSError, mqtt.WebsocketConnectionError) as err:
                     _LOGGER.debug(
                         "Error re-connecting to MQTT server due to exception: %s", err
                     )

tests/components/mqtt/test_client.py

@@ -1888,10 +1888,18 @@ async def test_mqtt_subscribes_and_unsubscribes_in_chunks(
     assert len(mqtt_client_mock.unsubscribe.mock_calls[1][1][0]) == 2
 
 
+@pytest.mark.parametrize(
+    "exception",
+    [
+        OSError,
+        paho_mqtt.WebsocketConnectionError,
+    ],
+)
 async def test_auto_reconnect(
     hass: HomeAssistant,
     setup_with_birth_msg_client_mock: MqttMockPahoClient,
     caplog: pytest.LogCaptureFixture,
+    exception: Exception,
 ) -> None:
     """Test reconnection is automatically done."""
     mqtt_client_mock = setup_with_birth_msg_client_mock
@@ -1902,7 +1910,7 @@ async def test_auto_reconnect(
     mqtt_client_mock.on_disconnect(None, None, 0)
     await hass.async_block_till_done()
 
-    mqtt_client_mock.reconnect.side_effect = OSError("foo")
+    mqtt_client_mock.reconnect.side_effect = exception("foo")
     async_fire_time_changed(
         hass, utcnow() + timedelta(seconds=RECONNECT_INTERVAL_SECONDS)
     )