Publish attributes unconditionally (#14179)

* Publish attributes unconditionally

Because the attribute publish command was previously hidden behind `if val:`, falsy values like False and 0.0 weren't being published, thereby making Statestream -- particularly in the case of booleans, where the first True would be retained indefinitely -- a completely worthless indicator of state.

* Change bool test to False to confirm falsy values pass

homeassistant/components/mqtt_statestream.py

@@ -88,7 +88,6 @@ def async_setup(hass, config):
 
         if publish_attributes:
             for key, val in new_state.attributes.items():
-                if val:
                 encoded_val = json.dumps(val, cls=JSONEncoder)
                 hass.components.mqtt.async_publish(mybase + key,
                                                    encoded_val, 1, True)

tests/components/test_mqtt_statestream.py

@@ -134,7 +134,7 @@ class TestMqttStateStream(object):
         test_attributes = {
             "testing": "YES",
             "list": ["a", "b", "c"],
-            "bool": True
+            "bool": False
         }
 
         # Set a state of an entity
@@ -150,7 +150,7 @@ class TestMqttStateStream(object):
                                1, True),
             call.async_publish(self.hass, 'pub/fake/entity/list',
                                '["a", "b", "c"]', 1, True),
-            call.async_publish(self.hass, 'pub/fake/entity/bool', "true",
+            call.async_publish(self.hass, 'pub/fake/entity/bool', "false",
                                1, True)
         ]