Better guarding

Author: bouwew

tests/test_smile.py

@@ -388,7 +388,7 @@ async def device_test(self, smile=pw_smile.Smile, testdata=None, preset=False):
         extra = data[0]
         device_list = data[1]
 
-        if extra["heater_id"]:
+        if "heater_id" in extra:
             self.cooling_present = extra["cooling_present"]
         self.notifications = extra["notifications"]
         self._write_json("all_data", data)