re-adding tag v1_9_0_4 as an alias of trunk@18848v1_9_0_4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18849 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 0 insertions, 90 deletions

diff --git a/trunk/lib/test/unit/util/observable.rb b/trunk/lib/test/unit/util/observable.rb
deleted file mode 100644
index 924c10f24c..0000000000
--- a/trunk/lib/test/unit/util/observable.rb
+++ /dev/null
@@ -1,90 +0,0 @@
-#--
-#
-# Author:: Nathaniel Talbott.
-# Copyright:: Copyright (c) 2000-2002 Nathaniel Talbott. All rights reserved.
-# License:: Ruby license.
-
-require 'test/unit/util/procwrapper'
-
-module Test
-  module Unit
-    module Util # :nodoc:
-
-      # This is a utility class that allows anything mixing
-      # it in to notify a set of listeners about interesting
-      # events.
-      module Observable
-        # We use this for defaults since nil might mean something
-        NOTHING = "NOTHING/#{__id__}"
-
-        # Adds the passed proc as a listener on the
-        # channel indicated by channel_name. listener_key
-        # is used to remove the listener later; if none is
-        # specified, the proc itself is used.
-        #
-        # Whatever is used as the listener_key is
-        # returned, making it very easy to use the proc
-        # itself as the listener_key:
-        #
-        #  listener = add_listener("Channel") { ... }
-        #  remove_listener("Channel", listener)
-        def add_listener(channel_name, listener_key=NOTHING, &listener) # :yields: value
-          unless(block_given?)
-            raise ArgumentError.new("No callback was passed as a listener")
-          end
-      
-          key = listener_key
-          if (listener_key == NOTHING)
-            listener_key = listener
-            key = ProcWrapper.new(listener)
-          end
-      
-          channels[channel_name] ||= {}
-          channels[channel_name][key] = listener
-          return listener_key
-        end
-
-        # Removes the listener indicated by listener_key
-        # from the channel indicated by
-        # channel_name. Returns the registered proc, or
-        # nil if none was found.
-        def remove_listener(channel_name, listener_key)
-          channel = channels[channel_name]
-          return nil unless (channel)
-          key = listener_key
-          if (listener_key.instance_of?(Proc))
-            key = ProcWrapper.new(listener_key)
-          end
-          if (channel.has_key?(key))
-            return channel.delete(key)
-          end
-          return nil
-        end
-
-        # Calls all the procs registered on the channel
-        # indicated by channel_name. If value is
-        # specified, it is passed in to the procs,
-        # otherwise they are called with no arguments.
-        #
-        #--
-        #
-        # Perhaps this should be private? Would it ever
-        # make sense for an external class to call this
-        # method directly?
-        def notify_listeners(channel_name, *arguments)
-          channel = channels[channel_name]
-          return 0 unless (channel)
-          listeners = channel.values
-          listeners.each { |listener| listener.call(*arguments) }
-          return listeners.size
-        end
-
-        private
-        def channels # :nodoc:
-          @channels ||= {}
-          return @channels
-        end
-      end
-    end
-  end
-end