Fix ZHA "referencing a non existing via_device" warning

homeassistant/components/zha/entity.py

@@ -87,7 +87,7 @@ def device_info(self) -> DeviceInfo:
             manufacturer=zha_device_info[ATTR_MANUFACTURER],
             model=zha_device_info[ATTR_MODEL],
             name=zha_device_info[ATTR_NAME],
-            via_device=(DOMAIN, zha_gateway.state.node_info.ieee),
+            via_device=(DOMAIN, str(zha_gateway.state.node_info.ieee)),
         )
 
     @callback

tests/components/zha/test_entity.py

@@ -0,0 +1,47 @@
+"""Test ZHA entities."""
+
+from zigpy.profiles import zha
+from zigpy.zcl.clusters import general
+
+from homeassistant.components.zha.helpers import get_zha_gateway
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import device_registry as dr
+
+from .conftest import SIG_EP_INPUT, SIG_EP_OUTPUT, SIG_EP_PROFILE, SIG_EP_TYPE
+
+
+async def test_device_registry_via_device(
+    hass: HomeAssistant,
+    setup_zha,
+    zigpy_device_mock,
+    device_registry: dr.DeviceRegistry,
+) -> None:
+    """Test ZHA `via_device` is set correctly."""
+
+    await setup_zha()
+    gateway = get_zha_gateway(hass)
+
+    zigpy_device = zigpy_device_mock(
+        {
+            1: {
+                SIG_EP_INPUT: [general.Basic.cluster_id],
+                SIG_EP_OUTPUT: [],
+                SIG_EP_TYPE: zha.DeviceType.ON_OFF_SWITCH,
+                SIG_EP_PROFILE: zha.PROFILE_ID,
+            }
+        },
+    )
+
+    zha_device = gateway.get_or_create_device(zigpy_device)
+    await gateway.async_device_initialized(zigpy_device)
+    await hass.async_block_till_done(wait_background_tasks=True)
+
+    reg_coordinator_device = device_registry.async_get_device(
+        identifiers={("zha", str(gateway.state.node_info.ieee))}
+    )
+
+    reg_device = device_registry.async_get_device(
+        identifiers={("zha", str(zha_device.ieee))}
+    )
+
+    assert reg_device.via_device_id == reg_coordinator_device.id