fix forum post test

app/logical/cache.rb

@@ -36,7 +36,7 @@ class Cache
     value = MEMCACHE.get key
     elapsed = Time.now - start_time
     if expiry_in_seconds
-      expiry = expiry_in_seconds.seconds.from_now.to_i if expiry_in_seconds
+      expiry = expiry_in_seconds.seconds.from_now.to_i
     else
       expiry = 0
     end

test/unit/forum_post_test.rb

@@ -27,6 +27,10 @@ class ForumPostTest < ActiveSupport::TestCase
       end
 
       context "that is deleted" do
+        setup do
+          CurrentUser.user = FactoryGirl.create(:moderator_user)
+        end
+        
         should "update the topic's updated_at timestamp" do
           @topic.reload
           assert_equal(@posts[-1].updated_at.to_i, @topic.updated_at.to_i)