RegistrationsController#create re-renders the form instead of redirecting, so user doesn't lose what they've entered.

Took out RegistrationsController#update, since all it was doing was calling super.
Took out stubbing of user save, because I actually want to check that save is doing the right thing.

app/controllers/registrations_controller.rb

@@ -11,11 +11,7 @@ class RegistrationsController < Devise::RegistrationsController
       sign_in_and_redirect(:user, @user)
     else
       flash[:error] = @user.errors.full_messages.join(', ')
-      redirect_to new_user_registration_path
+      render :new
     end
   end
-
-  def update
-    super
-  end
 end

spec/controllers/registrations_controller_spec.rb

@@ -41,15 +41,15 @@ describe RegistrationsController do
     end
     context "with invalid parameters" do
       before do
-        @valid_params["user"]["password_confirmation"] = "baddword"
         @invalid_params = @valid_params
-        user = Factory.build(:user)
-        user.stub!(:save){user.errors.add(:base, "hello"); false}
-        User.stub!(:build).and_return(user)
+        @invalid_params["user"]["password_confirmation"] = "baddword"
       end
       it "does not create a user" do
         lambda { get :create, @invalid_params }.should_not change(User, :count)
       end
+      it "does not create a person" do
+        lambda { get :create, @invalid_params }.should_not change(Person, :count)
+      end
       it "assigns @user" do
         get :create, @invalid_params
         assigns(:user).should_not be_nil
@@ -58,9 +58,9 @@ describe RegistrationsController do
         get :create, @invalid_params
         flash[:error].should_not be_blank
       end
-      it "goes back to the form" do
+      it "re-renders the form" do
         get :create, @invalid_params
-        response.should redirect_to new_user_registration_path
+        response.should render_template("registrations/new")
       end
     end
   end