emptying device state attributes if the update from the feed fails (#17249)

homeassistant/components/sensor/geo_rss_events.py

@@ -145,3 +145,4 @@ class GeoRssServiceSensor(Entity):
             # If no events were found due to an error then just set state to
             # zero.
             self._state = 0
+            self._state_attributes = {}

tests/components/sensor/test_geo_rss_events.py

@@ -123,6 +123,10 @@ class TestGeoRssServiceUpdater(unittest.TestCase):
                 assert len(all_states) == 1
                 state = self.hass.states.get("sensor.event_service_any")
                 assert int(state.state) == 0
+                assert state.attributes == {
+                    ATTR_FRIENDLY_NAME: "Event Service Any",
+                    ATTR_UNIT_OF_MEASUREMENT: "Events",
+                    ATTR_ICON: "mdi:alert"}
 
     @mock.patch('georss_client.generic_feed.GenericFeed')
     def test_setup_with_categories(self, mock_feed):