ensure a transition can be run from a method reference on another object

spec/xfluidity_spec.py

@@ -28,8 +28,9 @@ def exit_light(self):
     def enter_light(self):
         self.pass_light = True
 
-    def boom(self):
+    def boom(self, param=None):
         self.is_destroyed = True
+        self.boom_param = param
 
 
 class DoorWannabe(object):
@@ -78,3 +79,10 @@ def it_can_get_rid_of_state_machine_stuff(self):
         self.door_wannabe |should_not| respond_to('crack')
         self.door_wannabe |should_not| respond_to('close')
 
+    def it_runs_action_from_a_reference_on_another_object(self):
+        anyone = type('object', (), {})()
+        anyone.transition = self.door.crack
+        anyone.transition('own3d')
+        self.door.boom_param |should| equal_to('own3d')
+        self.door.current_state |should| equal_to('broken')
+