add fixed file

add framework_test

add another test

railties/lib/rails/tasks/framework.rake

@@ -32,35 +32,39 @@ namespace :rails do
           FileUtils.cp_r src_name, dst_name
         end
       end
-     end
+    end
   end
 
   namespace :update do
-    def invoke_from_app_generator(method)
-      app_generator.send(method)
-    end
+    class RailsUpdate
 
-    def app_generator
-      @app_generator ||= begin
-        require 'rails/generators'
-        require 'rails/generators/rails/app/app_generator'
-        gen = Rails::Generators::AppGenerator.new ["rails"], { with_dispatchers: true },
-                                                             destination_root: Rails.root
-        File.exist?(Rails.root.join("config", "application.rb")) ?
-          gen.send(:app_const) : gen.send(:valid_const?)
-        gen
+      def self.invoke_from_app_generator(method)
+        RailsUpdate.app_generator.send(method)
       end
+
+      def self.app_generator
+        @app_generator ||= begin
+                             require 'rails/generators'
+                             require 'rails/generators/rails/app/app_generator'
+                             gen = Rails::Generators::AppGenerator.new ["rails"], { with_dispatchers: true },
+                               destination_root: Rails.root
+                             File.exist?(Rails.root.join("config", "application.rb")) ?
+                               gen.send(:app_const) : gen.send(:valid_const?)
+                             gen
+                           end
+      end
+
     end
 
     # desc "Update config/boot.rb from your current rails install"
     task :configs do
-      invoke_from_app_generator :create_boot_file
-      invoke_from_app_generator :update_config_files
+      RailsUpdate.invoke_from_app_generator :create_boot_file
+      RailsUpdate.invoke_from_app_generator :update_config_files
     end
 
     # desc "Adds new executables to the application bin/ directory"
     task :bin do
-      invoke_from_app_generator :create_bin_files
+      RailsUpdate.invoke_from_app_generator :create_bin_files
     end
   end
 end

railties/test/application/rake/framework_test.rb

@@ -0,0 +1,46 @@
+require "isolation/abstract_unit"
+require "active_support/core_ext/string/strip"
+
+module ApplicationTests
+  module RakeTests
+    class FrameworkTest < ActiveSupport::TestCase
+      include ActiveSupport::Testing::Isolation
+
+
+      def setup
+        build_app
+        boot_rails
+        FileUtils.rm_rf("#{app_path}/config/environments")
+      end
+
+      def teardown
+        teardown_app
+      end
+
+      def load_tasks
+        require 'rake'
+        require 'rdoc/task'
+        require 'rake/testtask'
+
+        Rails.application.load_tasks
+      end
+
+      test 'requiring the rake task should not define method .app_generator on Object' do
+        require "#{app_path}/config/environment"
+        load_tasks
+        assert_raise NameError do
+          Object.method(:app_generator)
+        end
+      end
+
+      test 'requiring the rake task should not define method .invoke_from_app_generator on Object' do
+        require "#{app_path}/config/environment"
+        load_tasks
+
+        assert_raise NameError do
+          Object.method(:invoke_from_app_generator)
+        end
+      end
+    end
+  end
+end