Interpreter.queue only accepts Event instances

sismic/interpreter.py

@@ -129,8 +129,10 @@ def queue(self, event: model.Event):
             external_event = model.Event(event.name, **event.data)
             for bound_callable in self._bound:
                 bound_callable(external_event)
-        else:
+        elif isinstance(event, model.Event):
             self._events.append(event)
+        else:
+            raise ValueError('{} is not an Event instance'.format(event))
         return self
 
     def execute(self, max_steps: int=-1) -> list:
@@ -227,7 +229,7 @@ def _select_transitions(self, event: model.Event=None) -> list:
 
         # Retrieve the firable transitions for all active state
         for transition in self._statechart.transitions:
-            if (transition.event == getattr(event, 'name', None) and transition.source in self._configuration and
+            if (transition.event == event.name and transition.source in self._configuration and
                     (transition.guard is None or self._evaluator.evaluate_guard(transition, event))):
                 transitions.add(transition)