BUGFIX: don't alery myself when I link to myself

app/services/post_alerter.rb

@@ -143,11 +143,11 @@ class PostAlerter
 
   def extract_linked_users(post)
     post.topic_links.map do |link|
-      post = link.link_post
-      if !post && topic = link.link_topic
-        post = topic.posts(post_number: 1).first
+      linked_post = link.link_post
+      if !linked_post && topic = link.link_topic
+        linked_post = topic.posts(post_number: 1).first
       end
-      post && post.user
+      linked_post && post.user_id != linked_post.user_id && linked_post.user
     end.compact
   end
 

spec/services/post_alerter_spec.rb

@@ -6,10 +6,7 @@ describe PostAlerter do
 
   def create_post_with_alerts(args={})
     post = Fabricate(:post, args)
-    alerter = PostAlerter.new
-    alerter.after_create_post(post)
-    alerter.after_save_post(post)
-    post
+    PostAlerter.post_created(post)
   end
 
   context 'quotes' do
@@ -35,6 +32,21 @@ describe PostAlerter do
     end
   end
 
+  context 'linked' do
+    it "will notify correctly on linking" do
+      post1 = create_post
+      user = post1.user
+      create_post(raw: "my magic topic\n##{Discourse.base_url}#{post1.url}")
+
+      user.notifications.count.should == 1
+
+      create_post(user: user, raw: "my magic topic\n##{Discourse.base_url}#{post1.url}")
+
+      user.reload
+      user.notifications.count.should == 1
+    end
+  end
+
   context '@mentions' do
 
     let(:user) { Fabricate(:user) }