Add last triggered to script (#5261)

* Add last triggered to script

* Add tests for script last_triggered

homeassistant/components/script.py

@@ -31,6 +31,7 @@
 
 ATTR_VARIABLES = 'variables'
 ATTR_LAST_ACTION = 'last_action'
+ATTR_LAST_TRIGGERED = 'last_triggered'
 ATTR_CAN_CANCEL = 'can_cancel'
 
 _LOGGER = logging.getLogger(__name__)
@@ -155,6 +156,7 @@ def name(self):
     def state_attributes(self):
         """Return the state attributes."""
         attrs = {}
+        attrs[ATTR_LAST_TRIGGERED] = self.script.last_triggered
         if self.script.can_cancel:
             attrs[ATTR_CAN_CANCEL] = self.script.can_cancel
         if self.script.last_action:

homeassistant/helpers/script.py

@@ -46,6 +46,7 @@ def __init__(self, hass: HomeAssistant, sequence, name: str=None,
         self._change_listener = change_listener
         self._cur = -1
         self.last_action = None
+        self.last_triggered = None
         self.can_cancel = any(CONF_DELAY in action for action
                               in self.sequence)
         self._async_unsub_delay_listener = None
@@ -68,6 +69,7 @@ def async_run(self, variables: Optional[Sequence]=None) -> None:
 
         This method is a coroutine.
         """
+        self.last_triggered = date_util.utcnow()
         if self._cur == -1:
             self._log('Running script')
             self._cur = 0

tests/helpers/test_script.py

@@ -353,3 +353,22 @@ def record_event(event):
         script_obj.run()
         self.hass.block_till_done()
         assert len(script_obj._config_cache) == 2
+
+    def test_last_triggered(self):
+        """Test the last_triggered."""
+        event = 'test_event'
+
+        script_obj = script.Script(self.hass, cv.SCRIPT_SCHEMA([
+            {'event': event},
+            {'delay': {'seconds': 5}},
+            {'event': event}]))
+
+        assert script_obj.last_triggered is None
+
+        time = dt_util.utcnow()
+        with mock.patch('homeassistant.helpers.script.date_util.utcnow',
+                        return_value=time):
+            script_obj.run()
+            self.hass.block_till_done()
+
+        assert script_obj.last_triggered == time