Fix problems trying to functional test AC::Metal controllers

[#5393 state:committed]

actionpack/lib/action_controller/metal/testing.rb

@@ -14,18 +14,10 @@ def process_with_new_base_test(request, response)
         cookies.write(@_response)
       end
       @_response.prepare!
-      set_test_assigns
+      @assigns = respond_to?(:view_assigns) ? view_assigns : {}
       ret
     end
 
-    def set_test_assigns
-      @assigns = {}
-      (instance_variable_names - self.class.protected_instance_variables).each do |var|
-        name, value = var[1..-1], instance_variable_get(var)
-        @assigns[name] = value
-      end
-    end
-
     # TODO : Rewrite tests using controller.headers= to use Rack env
     def headers=(new_headers)
       @_response ||= ActionDispatch::Response.new

actionpack/lib/action_controller/test_case.rb

@@ -411,7 +411,7 @@ def process(action, parameters = nil, session = nil, flash = nil, http_method =
         @controller.request = @request
         @controller.params.merge!(parameters)
         build_request_uri(action, parameters)
-        Base.class_eval { include Testing }
+        @controller.class.class_eval { include Testing }
         @controller.process_with_new_base_test(@request, @response)
         @request.session.delete('flash') if @request.session['flash'].blank?
         @response
@@ -448,7 +448,7 @@ def rescue_action_in_public!
 
       def build_request_uri(action, parameters)
         unless @request.env["PATH_INFO"]
-          options = @controller.__send__(:url_options).merge(parameters)
+          options = @controller.respond_to?(:url_options) ? @controller.__send__(:url_options).merge(parameters) : parameters
           options.update(
             :only_path => true,
             :action => action,

actionpack/test/controller/new_base/bare_metal_test.rb

@@ -39,4 +39,11 @@ class HeadTest < ActiveSupport::TestCase
       assert_equal 404, status
     end
   end
+
+  class BareControllerTest < ActionController::TestCase
+    test "GET index" do
+      get :index
+      assert_equal "Hello world", @response.body
+    end
+  end
 end