tests: add misc controller tests.

app/controllers/admin/dashboards_controller.rb

@@ -1,7 +1,5 @@
 module Admin
   class DashboardsController < ApplicationController
-    before_filter :admin_only
-    
     def show
       @dashboard = AdminDashboard.new
     end

app/logical/admin_dashboard.rb

@@ -12,6 +12,6 @@ class AdminDashboard
   end
 
   def forum_topics
-    ForumTopic.where(category_id: 1).order("id desc").limit(20)
+    ForumTopic.search(category_id: 1).order("id desc").limit(20)
   end
 end