Autoload HTML::Document and sanitizers

actionpack/lib/action_controller/assertions/response_assertions.rb

-require 'rexml/document'
-require 'html/document'
-
 module ActionController
   module Assertions
     # A small suite of assertions that test responses from Rails applications.

actionpack/lib/action_controller/assertions/selector_assertions.rb

@@ -3,8 +3,7 @@
 # Under MIT and/or CC By license.
 #++
 
-require 'rexml/document'
-require 'html/document'
+require 'action_controller/vendor/html-scanner'
 
 module ActionController
   module Assertions

actionpack/lib/action_controller/assertions/tag_assertions.rb

-require 'rexml/document'
-require 'html/document'
-
 module ActionController
   module Assertions
     # Pair of assertions to testing elements in the HTML output of the response.

actionpack/lib/action_controller/vendor/html-scanner.rb

+$LOAD_PATH << "#{File.dirname(__FILE__)}/html-scanner"
+
+module HTML
+  autoload :Document, 'html/document'
+  autoload :Sanitizer, 'html/sanitizer'
+  autoload :FullSanitizer, 'html/sanitizer'
+  autoload :LinkSanitizer, 'html/sanitizer'
+  autoload :WhiteListSanitizer, 'html/sanitizer'
+end

actionpack/lib/action_view/helpers/sanitize_helper.rb

 require 'action_view/helpers/tag_helper'
-
-begin
-  require 'html/document'
-rescue LoadError
-  html_scanner_path = "#{File.dirname(__FILE__)}/../../action_controller/vendor/html-scanner"
-  if File.directory?(html_scanner_path)
-    $:.unshift html_scanner_path
-    require 'html/document'
-  end
-end
+require 'action_controller/vendor/html-scanner'
 
 module ActionView
   module Helpers #:nodoc:

actionpack/lib/action_view/helpers/text_helper.rb

 require 'action_view/helpers/tag_helper'
 
-begin
-  require 'html/document'
-rescue LoadError
-  html_scanner_path = "#{File.dirname(__FILE__)}/../../action_controller/vendor/html-scanner"
-  if File.directory?(html_scanner_path)
-    $:.unshift html_scanner_path
-    require 'html/document'
-  end
-end
-
 module ActionView
   module Helpers #:nodoc:
     # The TextHelper module provides a set of methods for filtering, formatting