FEATURE: Allow posting a link with topics

spec/support/helpers.rb

@@ -28,7 +28,7 @@ module Helpers
     args[:title] ||= "This is my title #{Helpers.next_seq}"
     user = args.delete(:user) || Fabricate(:user)
     guardian = Guardian.new(user)
-    args[:category] = args[:category].name if args[:category].is_a?(Category)
+    args[:category] = args[:category].id if args[:category].is_a?(Category)
     TopicCreator.create(user, guardian, args)
   end
 
@@ -37,7 +37,7 @@ module Helpers
     args[:raw] ||= "This is the raw body of my post, it is cool #{Helpers.next_seq}"
     args[:topic_id] = args[:topic].id if args[:topic]
     user = args.delete(:user) || Fabricate(:user)
-    args[:category] = args[:category].name if args[:category].is_a?(Category)
+    args[:category] = args[:category].id if args[:category].is_a?(Category)
     creator = PostCreator.new(user, args)
     post = creator.create