Don't require initializer.rb in core.rb

railties/lib/rails/core.rb

@@ -15,7 +15,6 @@ require 'rails/paths'
 require 'rails/core'
 require 'rails/configuration'
 require 'rails/deprecation'
-require 'rails/initializer'
 require 'rails/ruby_version_check'
 
 # For Ruby 1.8, this initialization sets $KCODE to 'u' to enable the

railties/test/abstract_unit.rb

@@ -22,6 +22,8 @@ require 'active_support/test_case'
 require 'action_controller'
 require 'rails'
 
-Rails::Initializer.run do |config|
+# TODO: Remove these hacks
+class TestApp < Rails::Application
   config.root = File.dirname(__FILE__)
 end
+Rails.application = TestApp

railties/test/application/notifications_test.rb

@@ -1,27 +1,35 @@
 require "isolation/abstract_unit"
 
 module ApplicationTests
+  class MyQueue
+    def publish(name, *args)
+      raise name
+    end
+
+    # Not a full queue implementation
+    def method_missing(name, *args, &blk)
+      self
+    end
+  end
+
   class NotificationsTest < Test::Unit::TestCase
     include ActiveSupport::Testing::Isolation
 
-    class MyQueue
-      def publish(name, *args)
-        raise name
-      end
-    end
-
     def setup
       build_app
       boot_rails
-      require "rails"
       require "active_support/notifications"
       @events = []
-      Rails::Initializer.run do |c|
-        c.notifications.notifier = ActiveSupport::Notifications::Notifier.new(MyQueue.new)
-      end
+
+      add_to_config <<-RUBY
+        config.notifications.notifier = ActiveSupport::Notifications::Notifier.new(ApplicationTests::MyQueue.new)
+      RUBY
     end
 
     test "new queue is set" do
+      use_frameworks []
+      require "#{app_path}/config/environment"
+
       assert_raise RuntimeError do
         ActiveSupport::Notifications.publish('foo')
       end

railties/test/plugins/framework_extension_test.rb

@@ -2,6 +2,8 @@ require "isolation/abstract_unit"
 
 module PluginsTest
   class FrameworkExtensionTest < Test::Unit::TestCase
+    include ActiveSupport::Testing::Isolation
+
     def setup
       build_app
       boot_rails
@@ -23,12 +25,15 @@ module PluginsTest
       require 'rake'
       require 'rake/testtask'
       require 'rake/rdoctask'
+
       AppTemplate::Application.load_tasks
       assert $ran_block
     end
   end
 
   class ActiveRecordExtensionTest < Test::Unit::TestCase
+    include ActiveSupport::Testing::Isolation
+
     def setup
       build_app
       boot_rails