io/null_output.rb in trepanning-0.1.2 vs io/null_output.rb in trepanning-0.1.3

@@ -1,20 +1,26 @@
 # -*- coding: utf-8 -*-
-# Copyright (C) 2010 Rocky Bernstein <[e-mail]>
+# Copyright (C) 2010, 2011 Rocky Bernstein <[e-mail]>
 
 # Nukes output. Used for example in sourcing where you don't want
 # to see output.
 # 
 
 require_relative 'base_io'
 
 class Trepan
   class OutputNull < Trepan::OutputBase
     def initialize(out, opts={})
+      @closed = false
       super
     end
 
     def close
+      @closed = true
+    end
+
+    def closed?
+      !!@closed
     end
 
     def flush
     end