Add Channel#broadcast_to

actioncable/lib/action_cable/channel/broadcasting.rb

@@ -7,7 +7,7 @@ module ActionCable
     module Broadcasting
       extend ActiveSupport::Concern
 
-      delegate :broadcasting_for, to: :class
+      delegate :broadcasting_for, :broadcast_to, to: :class
 
       module ClassMethods
         # Broadcast a hash to a unique broadcasting for this <tt>model</tt> in this channel.

actioncable/test/channel/test_case_test.rb

@@ -180,7 +180,7 @@ class BroadcastsTestChannel < ActionCable::Channel::Base
   def broadcast_to_user(data)
     user = User.new user_id
 
-    self.class.broadcast_to user, text: data["message"]
+    broadcast_to user, text: data["message"]
   end
 end