3 files changed, 7 insertions, 9 deletions
diff --git a/actionpack/lib/action_controller/metal.rb b/actionpack/lib/action_controller/metal.rb
index 696fbf6e09..70ca99f01c 100644
--- a/actionpack/lib/action_controller/metal.rb
+++ b/actionpack/lib/action_controller/metal.rb
@@ -30,10 +30,8 @@ module ActionController
       end
     end
 
-    def build(action, app=nil, &block)
-      app  ||= block
+    def build(action, app = Proc.new)
       action = action.to_s
-      raise "MiddlewareStack#build requires an app" unless app
 
       middlewares.reverse.inject(app) do |a, middleware|
         middleware.valid?(action) ? middleware.build(a) : a
diff --git a/actionpack/lib/action_controller/metal/url_for.rb b/actionpack/lib/action_controller/metal/url_for.rb
index 89c3545323..07265be3fe 100644
--- a/actionpack/lib/action_controller/metal/url_for.rb
+++ b/actionpack/lib/action_controller/metal/url_for.rb
@@ -27,7 +27,7 @@ module ActionController
         :host => request.host,
         :port => request.optional_port,
         :protocol => request.protocol,
-        :_recall => request.symbolized_path_parameters
+        :_recall => request.path_parameters
       }.merge(super).freeze
 
       if (same_origin = _routes.equal?(env["action_dispatch.routes".freeze])) ||
diff --git a/actionpack/lib/action_controller/test_case.rb b/actionpack/lib/action_controller/test_case.rb
index c6a8f581de..e6695ffc90 100644
--- a/actionpack/lib/action_controller/test_case.rb
+++ b/actionpack/lib/action_controller/test_case.rb
@@ -199,7 +199,7 @@ module ActionController
           value = value.dup
         end
 
-        if extra_keys.include?(key.to_sym)
+        if extra_keys.include?(key)
           non_path_parameters[key] = value
         else
           if value.is_a?(Array)
@@ -208,7 +208,7 @@ module ActionController
             value = value.to_param
           end
 
-          path_parameters[key.to_s] = value
+          path_parameters[key] = value
         end
       end
 
@@ -583,6 +583,7 @@ module ActionController
         end
 
         parameters, session, flash = args
+        parameters ||= {}
 
         # Ensure that numbers and symbols passed as params are converted to
         # proper params, as is the case when engaging rack.
@@ -601,7 +602,6 @@ module ActionController
 
         @request.env['REQUEST_METHOD'] = http_method
 
-        parameters ||= {}
         controller_class_name = @controller.class.anonymous? ?
           "anonymous" :
           @controller.class.controller_path
@@ -695,7 +695,7 @@ module ActionController
             :only_path => true,
             :action => action,
             :relative_url_root => nil,
-            :_recall => @request.symbolized_path_parameters)
+            :_recall => @request.path_parameters)
 
           url, query_string = @routes.url_for(options).split("?", 2)
 
@@ -706,7 +706,7 @@ module ActionController
       end
 
       def html_format?(parameters)
-        return true unless parameters.is_a?(Hash)
+        return true unless parameters.key?(:format)
         Mime.fetch(parameters[:format]) { Mime['html'] }.html?
       end
     end