Adding more unit tests. Fixing Salmon slaps XML

app/services/favourite_service.rb

@@ -31,14 +31,10 @@ class FavouriteService < BaseService
         end
 
         object_type xml, :activity
-        verb xml, :favourite
+        verb xml, :favorite
 
         target(xml) do
-          author(xml) do
-            include_author xml, favourite.status.account
-          end
-
-          include_entry xml, favourite.status.stream_entry
+          include_target xml, favourite.status
         end
       end
     end.to_xml

app/services/fetch_atom_service.rb

@@ -2,6 +2,8 @@
 
 class FetchAtomService < BaseService
   def call(url)
+    return if url.blank?
+
     response = http_client.head(url)
 
     Rails.logger.debug "Remote status HEAD request returned code #{response.code}"

app/services/unfavourite_service.rb

@@ -22,14 +22,10 @@ class UnfavouriteService < BaseService
         end
 
         object_type xml, :activity
-        verb xml, :unfavourite
+        verb xml, :unfavorite
 
         target(xml) do
-          author(xml) do
-            include_author xml, favourite.status.account
-          end
-
-          include_entry xml, favourite.status.stream_entry
+          include_target xml, favourite.status
         end
       end
     end.to_xml