FIX: Replace emoji in local oneboxes

lib/onebox/engine/discourse_local_onebox.rb

@@ -93,7 +93,7 @@ module Onebox
 
             quote = post.excerpt(SiteSetting.post_onebox_maxlength)
             args = { original_url: url,
-                     title: topic.title,
+                     title: PrettyText.unescape_emoji(topic.title),
                      avatar: PrettyText.avatar_img(topic.user.avatar_template, 'tiny'),
                      posts_count: topic.posts_count,
                      last_post: FreedomPatches::Rails4.time_ago_in_words(topic.last_posted_at, false, scope: :'datetime.distance_in_words_verbose'),

lib/onebox/templates/discourse_topic_onebox.hbs

@@ -2,7 +2,7 @@
   <div class='title'>
     <div class='quote-controls'></div>
     {{{avatar}}}
-    <a href="{{original_url}}">{{title}}</a> {{{category_html}}}
+    <a href="{{original_url}}">{{{title}}}</a> {{{category_html}}}
   </div>
   <blockquote>{{{quote}}}
     <div class='topic-info'>

spec/components/onebox/engine/discourse_local_onebox_spec.rb

@@ -60,11 +60,16 @@ describe Onebox::Engine::DiscourseLocalOnebox do
     end
 
     it "returns a link if not allowed to see the post" do
-      url = "#{topic.url}"
+      url = topic.url
       Guardian.any_instance.stubs(:can_see?).returns(false)
       expect(Onebox.preview(url).to_s).to eq("<a href='#{url}'>#{url}</a>")
     end
 
+    it "replaces emoji in the title" do
+      topic.update_column(:title, "Who wants to eat a :hamburger:")
+      expect(Onebox.preview(topic.url).to_s).to match(/hamburger.png/)
+    end
+
     it "returns some onebox goodness if post exists and can be seen" do
       SiteSetting.external_system_avatars_enabled = false
       url = "#{topic.url}"
@@ -94,7 +99,7 @@ describe Onebox::Engine::DiscourseLocalOnebox do
       expect(html).to eq("<video width='100%' height='100%' controls><source src='#{url}'><a href='#{url}'>#{url}</a></video>")
     end
   end
-  
+
   context "When deployed to a subfolder" do
     let(:base_url) { "http://test.localhost/subfolder" }
     let(:base_uri) { "/subfolder" }