Script: new attribute if can cancel

homeassistant/components/script.py

@@ -37,6 +37,7 @@ CONF_EVENT_DATA = "event_data"
 CONF_DELAY = "delay"
 
 ATTR_LAST_ACTION = 'last_action'
+ATTR_CAN_CANCEL = 'can_cancel'
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -113,6 +114,8 @@ class Script(ToggleEntity):
         self._cur = -1
         self._last_action = None
         self._listener = None
+        self._can_cancel = not any(CONF_DELAY in action for action
+                                   in self.sequence)
 
     @property
     def should_poll(self):
@@ -126,7 +129,9 @@ class Script(ToggleEntity):
     @property
     def state_attributes(self):
         """ Returns the state attributes. """
-        attrs = {}
+        attrs = {
+            ATTR_CAN_CANCEL: self._can_cancel
+        }
 
         if self._last_action:
             attrs[ATTR_LAST_ACTION] = self._last_action

tests/components/test_script.py

@@ -88,6 +88,8 @@ class TestScript(unittest.TestCase):
 
         self.assertEqual(1, len(calls))
         self.assertEqual('world', calls[0].data.get('hello'))
+        self.assertEqual(
+            True, self.hass.states.get(ENTITY_ID).attributes.get('can_cancel'))
 
     def test_calling_service_old(self):
         calls = []
@@ -172,6 +174,9 @@ class TestScript(unittest.TestCase):
         self.hass.pool.block_till_done()
 
         self.assertTrue(script.is_on(self.hass, ENTITY_ID))
+        self.assertEqual(
+            False,
+            self.hass.states.get(ENTITY_ID).attributes.get('can_cancel'))
 
         self.assertEqual(
             event,