Is there more beautiful expression of lazy evaluation for expect{} and DRY?

lazy_evaluation_for_expect_spec.rb

# FIXME
# Is there more beautiful expression of lazy evaluation for expect{} and DRY?
#
describe ItemsController do
  describe "POST 'create'" do
    before do
      @action = lambda { post :create, :name => 'foo' }
    end

    describe "response" do
      before do
        @action.call
      end
      subject {response}
      it { should redirect_to items_url }
    end

    describe "the change of the number of items" do
      specify {
        expect { @action.call }.to change(Item.count).by(1) }
      }
    end
  end
end

:item => { :name => 'foo' }が良い、というのはナシの方向で（笑）