testing REST with shoulda and factory_girl - destroy

Question

i'm developing test for REST using shoulda and factory_girl. Code below

 context "on :delete to :destroy" do
    setup do
      @controller = NewsArticlesController.new
      @request = ActionController::TestRequest.new
      @response = ActionController::TestResponse.new

      @news_article =  Factory.create(:news_article)

    end

    should "destroy new NewsArticle" do
      assert_difference('NewsArticle.count', -1) do
        delete :destroy, :id => @news_article.id
      end
    end

    should_redirect_to news_articles_path
  end

as a result i see

  1) Error:
test: on :delete to :destroy should redirect to index. (NewsArticlesControllerTest):
ArgumentError: block not supplied
    c:/develop/ruby/lib/ruby/gems/1.8/gems/thoughtbot-shoulda-2.10.2/lib/shoulda/action_controller/macros.rb:201:in `instance_eval'
    c:/develop/ruby/lib/ruby/gems/1.8/gems/thoughtbot-shoulda-2.10.2/lib/shoulda/action_controller/macros.rb:201:in `__bind_1248853182_16800
0'
    c:/develop/ruby/lib/ruby/gems/1.8/gems/thoughtbot-shoulda-2.10.2/lib/shoulda/context.rb:351:in `call'
    c:/develop/ruby/lib/ruby/gems/1.8/gems/thoughtbot-shoulda-2.10.2/lib/shoulda/context.rb:351:in `test: on :delete to :destroy should redirect to index. '

Could you tell me plz - whats wrong and how i can modify test to make them work right?

UPD: routes looks fine

news_articles GET    /news(.:format)                    {:controller=>"news_articles", :action=>"index"}

Answer 1

Maybe you should use a symbol and post method when calling delete:

 assert_difference 'Article.count', -1 do
    post :delete, :id => ...
  end

(referenced from http://api.rubyonrails.org/classes/ActiveSupport/Testing/Assertions.html#M001427)