feat: Coordinator, Geraet und Licht-Entitaet

tests/helpers.py

@@ -0,0 +1,16 @@
+"""Helpers for Home Assistant tests."""
+
+from __future__ import annotations
+
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import entity_registry as er
+
+from custom_components.ninlight.const import DOMAIN
+from tests_unit.samples import MAC_RGB
+
+
+def entity_id_for(hass: HomeAssistant, platform: str, key: str, mac: str = MAC_RGB) -> str:
+    """Look entities up by unique_id instead of guessing slugs."""
+    entity_id = er.async_get(hass).async_get_entity_id(platform, DOMAIN, f"{mac}_{key}")
+    assert entity_id is not None, f"no {platform} entity with key {key}"
+    return entity_id