Fix Google Assistant brightness calculation (#72514)

Co-authored-by: Paulus Schoutsen <balloob@gmail.com>

homeassistant/components/google_assistant/trait.py

@@ -249,7 +249,7 @@ class BrightnessTrait(_Trait):
         if domain == light.DOMAIN:
             brightness = self.state.attributes.get(light.ATTR_BRIGHTNESS)
             if brightness is not None:
-                response["brightness"] = int(100 * (brightness / 255))
+                response["brightness"] = round(100 * (brightness / 255))
             else:
                 response["brightness"] = 0
 
@@ -1948,7 +1948,7 @@ class VolumeTrait(_Trait):
         level = self.state.attributes.get(media_player.ATTR_MEDIA_VOLUME_LEVEL)
         if level is not None:
             # Convert 0.0-1.0 to 0-100
-            response["currentVolume"] = int(level * 100)
+            response["currentVolume"] = round(level * 100)
 
         muted = self.state.attributes.get(media_player.ATTR_MEDIA_VOLUME_MUTED)
         if muted is not None:

tests/components/google_assistant/test_google_assistant.py

@@ -225,7 +225,7 @@ async def test_query_request(hass_fixture, assistant_client, auth_header):
     assert len(devices) == 4
     assert devices["light.bed_light"]["on"] is False
     assert devices["light.ceiling_lights"]["on"] is True
-    assert devices["light.ceiling_lights"]["brightness"] == 70
+    assert devices["light.ceiling_lights"]["brightness"] == 71
     assert devices["light.ceiling_lights"]["color"]["temperatureK"] == 2631
     assert devices["light.kitchen_lights"]["color"]["spectrumHsv"] == {
         "hue": 345,

tests/components/google_assistant/test_smart_home.py

@@ -385,7 +385,7 @@ async def test_query_message(hass):
                 "light.another_light": {
                     "on": True,
                     "online": True,
-                    "brightness": 30,
+                    "brightness": 31,
                     "color": {
                         "spectrumHsv": {
                             "hue": 180,
@@ -1510,7 +1510,7 @@ async def test_query_recover(hass, caplog):
         "payload": {
             "devices": {
                 "light.bad": {"online": False},
-                "light.good": {"on": True, "online": True, "brightness": 19},
+                "light.good": {"on": True, "online": True, "brightness": 20},
             }
         },
     }