FEATURE: add a way to map arbitrary urls to a topic, post, or category. Useful for sites that have migrated to Discourse and want to redirect from their old site to Discourse with 301 redirects.

spec/controllers/permalinks_controller_spec.rb

@@ -0,0 +1,19 @@
+require 'spec_helper'
+
+describe PermalinksController do
+  describe 'show' do
+    it "should redirect to a permalink's target_url with status 301" do
+      permalink = Fabricate(:permalink)
+      Permalink.any_instance.stubs(:target_url).returns('/t/the-topic-slug/42')
+      get :show, url: permalink.url
+      response.should redirect_to('/t/the-topic-slug/42')
+      response.status.should == 301
+    end
+
+    it 'return 404 if permalink record does not exist' do
+      get :show, url: '/not/a/valid/url'
+      response.status.should == 404
+    end
+  end
+
+end