Middleware test

actionpack/test/controller/request/query_string_parsing_test.rb

@@ -11,6 +11,17 @@ class QueryStringParsingTest < ActionController::IntegrationTest
       head :ok
     end
   end
+  class EarlyParse
+    def initialize(app)
+      @app = app
+    end
+
+    def call(env)
+      # Trigger a Rack parse so that env caches the query params
+      Rack::Request.new(env).params
+      @app.call(env)
+    end
+  end
 
   def teardown
     TestController.last_query_parameters = nil
@@ -111,6 +122,8 @@ class QueryStringParsingTest < ActionController::IntegrationTest
         set.draw do |map|
           map.connect ':action', :controller => "query_string_parsing_test/test"
         end
+        @stack = ActionController::MiddlewareStack.new
+        @stack.use(EarlyParse)
 
         get "/parse", actual
         assert_response :ok