fix rain sensor for Velux GPU windows (home-assistant#151857)

Author: wollew

homeassistant/components/velux/binary_sensor.py

@@ -59,5 +59,6 @@ async def async_update(self) -> None:
             LOGGER.error("Error fetching limitation data for cover %s", self.name)
             return
 
-        # Velux windows with rain sensors report an opening limitation of 93 when rain is detected.
-        self._attr_is_on = limitation.min_value == 93
+        # Velux windows with rain sensors report an opening limitation of 93 or 100 (Velux GPU) when rain is detected.
+        # So far, only 93 and 100 have been observed in practice, documentation on this is non-existent AFAIK.
+        self._attr_is_on = limitation.min_value in {93, 100}

tests/components/velux/test_binary_sensor.py

@@ -40,7 +40,14 @@ async def test_rain_sensor_state(
     assert state is not None
     assert state.state == STATE_OFF
 
-    # simulate rain detected
+    # simulate rain detected (Velux GPU reports 100)
+    mock_window.get_limitation.return_value.min_value = 100
+    await update_polled_entities(hass, freezer)
+    state = hass.states.get(test_entity_id)
+    assert state is not None
+    assert state.state == STATE_ON
+
+    # simulate rain detected (other Velux models report 93)
     mock_window.get_limitation.return_value.min_value = 93
     freezer.tick(timedelta(minutes=5))
     async_fire_time_changed(hass)
@@ -49,6 +56,13 @@ async def test_rain_sensor_state(
     assert state is not None
     assert state.state == STATE_ON
 
+    # simulate no rain detected again
+    mock_window.get_limitation.return_value.min_value = 95
+    await update_polled_entities(hass, freezer)
+    state = hass.states.get(test_entity_id)
+    assert state is not None
+    assert state.state == STATE_OFF
+
 
 @pytest.mark.usefixtures("entity_registry_enabled_by_default")
 @pytest.mark.usefixtures("mock_module")