Rewrite SharedContext to use a simple record/playback mechanism.

Author: myronmarston

lib/rspec/core/shared_context.rb

@@ -17,31 +17,33 @@ module Core
     #       # ...
     #     end
     module SharedContext
-      include Hooks
-      include MemoizedHelpers::ClassMethods
-
       def included(group)
-        [:before, :after].each do |type|
-          [:all, :each].each do |scope|
-            group.hooks[type][scope].concat hooks[type][scope]
-          end
-        end
-        _nested_group_declarations.each do |name, block, *args|
-          group.describe name, *args, &block
+        __shared_context_recordings.each do |recording|
+          recording.playback_onto(group)
         end
       end
 
-      def describe(name, *args, &block)
-        _nested_group_declarations << [name, block, *args]
+      def __shared_context_recordings
+        @__shared_context_recordings ||= []
       end
 
-      alias_method :context, :describe
-
-      private
+      Recording = Struct.new(:method_name, :args, :block) do
+        def playback_onto(group)
+          group.__send__(method_name, *args, &block)
+        end
+      end
 
-      def _nested_group_declarations
-        @_nested_group_declarations ||= []
+      def self.record(*methods)
+        methods.each do |meth|
+          class_eval <<-EOS, __FILE__, __LINE__ + 1
+            def #{meth}(*args, &block)
+              __shared_context_recordings << Recording.new(:#{meth}, args, block)
+            end
+          EOS
+        end
       end
+
+      record :before, :after, :around, :subject, :let, :its, :describe, :context
     end
   end