Register MAC address connections on Synology DSM hub device (home-assistant#169085)

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
Co-authored-by: Michael <35783820+mib1185@users.noreply.github.com>

Author: tomwilkie

homeassistant/components/synology_dsm/entity.py

@@ -5,7 +5,11 @@
 from dataclasses import dataclass
 from typing import TYPE_CHECKING, Any
 
-from homeassistant.helpers.device_registry import DeviceInfo
+from homeassistant.helpers.device_registry import (
+    CONNECTION_NETWORK_MAC,
+    DeviceInfo,
+    format_mac,
+)
 from homeassistant.helpers.entity import EntityDescription
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
@@ -56,6 +60,9 @@ def __init__(
         )
         self._attr_device_info = DeviceInfo(
             identifiers={(DOMAIN, information.serial)},
+            connections={
+                (CONNECTION_NETWORK_MAC, format_mac(mac)) for mac in network.macs
+            },
             name=network.hostname,
             manufacturer="Synology",
             model=information.model,

tests/components/synology_dsm/test_sensor.py

@@ -15,7 +15,7 @@
     CONF_USERNAME,
 )
 from homeassistant.core import HomeAssistant
-from homeassistant.helpers import entity_registry as er
+from homeassistant.helpers import device_registry as dr, entity_registry as er
 
 from .common import (
     mock_dsm_external_usb_devices_usb0,
@@ -356,3 +356,17 @@ async def test_no_external_usb(
     """Test Synology DSM without USB."""
     sensor = hass.states.get("sensor.nas_meontheinternet_com_usb_disk_1_device_size")
     assert sensor is None
+
+
+async def test_hub_device_info_mac_connections(
+    hass: HomeAssistant,
+    setup_dsm_with_usb: MagicMock,
+) -> None:
+    """Test that the hub DeviceInfo includes MAC address connections."""
+    dev_reg = dr.async_get(hass)
+    device = dev_reg.async_get_device(identifiers={(DOMAIN, SERIAL)})
+    assert device is not None
+    assert device.connections == {
+        ("mac", "00:11:32:xx:xx:59"),
+        ("mac", "00:11:32:xx:xx:5a"),
+    }