Add app_id attribute to webostv media player (#181385)

homeassistant/components/webostv/media_player.py

@@ -148,6 +148,7 @@ class LgWebOSMediaPlayerEntity(WebOsTvEntity, RestoreEntity, MediaPlayerEntity):
 
         self._attr_source = self._current_source
         self._attr_source_list = sorted(self._source_list)
+        self._attr_app_id = tv_state.current_app_id
 
         self._attr_media_content_type = None
         if tv_state.current_app_id == LIVE_TV_APP_ID:

tests/components/webostv/snapshots/test_media_player.ambr

@@ -12,6 +12,7 @@
 # name: test_entity_attributes
   StateSnapshot({
     'attributes': ReadOnlyDict({
+      <MediaPlayerEntityStateAttribute.APP_ID: 'app_id'>: 'com.webos.app.livetv',
       <EntityStateAttribute.DEVICE_CLASS: 'device_class'>: 'tv',
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'LG webOS TV MODEL',
       <MediaPlayerEntityStateAttribute.MEDIA_VOLUME_MUTED: 'is_volume_muted'>: False,

tests/components/webostv/test_media_player.py

@@ -11,6 +11,7 @@ from syrupy.filters import props
 
 from homeassistant.components import automation
 from homeassistant.components.media_player import (
+    ATTR_APP_ID,
     ATTR_INPUT_SOURCE,
     ATTR_INPUT_SOURCE_LIST,
     ATTR_MEDIA_CONTENT_ID,
@@ -537,6 +538,20 @@ async def test_update_sources_live_tv_find(hass: HomeAssistant, client) -> None:
     assert len(sources) == 1
 
 
+async def test_app_id(hass: HomeAssistant, client) -> None:
+    """Test app_id follows the foreground app id reported by the TV."""
+    await setup_webostv(hass)
+    await client.mock_state_update()
+
+    assert hass.states.get(ENTITY_ID).attributes[ATTR_APP_ID] == LIVE_TV_APP_ID
+
+    # apps outside the source list still get a usable app id
+    client.tv_state.current_app_id = "com.webos.app.home"
+    await client.mock_state_update()
+
+    assert hass.states.get(ENTITY_ID).attributes[ATTR_APP_ID] == "com.webos.app.home"
+
+
 async def test_client_disconnected(
     hass: HomeAssistant,
     client,