Add spec for news_item_archive_links helper method.

spec/helpers/refinery/news/items_helper_spec.rb

+require 'spec_helper'
+
+module Refinery
+  module News
+    describe ItemsHelper do
+      describe '#news_item_archive_links' do
+        before do
+          2.times { FactoryGirl.create(:news_item, :publish_date => Time.utc(2012, 05)) }
+          3.times { FactoryGirl.create(:news_item, :publish_date => Time.utc(2012, 04)) }
+        end
+
+        it 'returns list of links to archives' do
+          expected = '<ul><li><a href="/news/archive/2012/5">May 2012 (2)</a></li><li><a href="/news/archive/2012/4">April 2012 (3)</a></li></ul>'
+          helper.news_item_archive_links.should eq(expected)
+        end
+      end
+    end
+  end
+end
+