Added support for private callbacks

lib/workflow.rb

@@ -266,9 +266,14 @@ def run_after_transition(from, to, event, *args)
     def run_action(action, *args)
       instance_exec(*args, &action) if action
     end
+
+    def has_callback?(action)
+      self.respond_to?(action) or self.private_methods.include?(action)
+    end
 
     def run_action_callback(action_name, *args)
-      self.send action_name.to_sym, *args if self.respond_to?(action_name.to_sym)
+      action = action_name.to_sym
+      self.send(action, *args) if has_callback?(action)
     end
 
     def run_on_entry(state, prior_state, triggering_event, *args)

test/main_test.rb

@@ -267,6 +267,7 @@ def assert_state(title, expected_state, klass = Order)
   test 'implicit transition callback' do
     args = mock()
     args.expects(:my_tran).once # this is validated at the end
+    args.expects(:another_tran).once
     c = Class.new
     c.class_eval do
       include Workflow
@@ -277,10 +278,20 @@ def my_transition(args)
         state :one do
           event :my_transition, :transitions_to => :two
         end
-        state :two
+        state :two do
+          event :another_transition, :transitions_to => :three
+        end
+        state :three
+      end
+
+      private
+      def another_transition(args)
+        args.another_tran
       end
     end
-    c.new.my_transition!(args)
+    a = c.new
+    a.my_transition!(args)
+    a.another_transition!(args)
   end
 
   test 'Single table inheritance (STI)' do