add result[:mentioned_usernames] for MentionFilter

Author: fahchen

lib/html/pipeline/@mention_filter.rb

@@ -60,6 +60,8 @@ def self.mentioned_logins_in(text)
       IGNORE_PARENTS = %w(pre code a).to_set
 
       def call
+        result[:mentioned_usernames] ||= []
+
         doc.search('text()').each do |node|
           content = node.to_html
           next if !content.include?('@')
@@ -108,6 +110,7 @@ def link_to_mention_info(text, info_url=nil)
       end
 
       def link_to_mentioned_user(login)
+        result[:mentioned_usernames] |= [login]
         url = File.join(base_url, login)
         "<a href='#{url}' class='user-mention'>" +
         "@#{login}" +

test/html/pipeline/mention_filter_test.rb

@@ -76,9 +76,7 @@ def test_links_to_more_info_when_info_url_given
   def mentioned_usernames
     result = {}
     MarkdownPipeline.call(@body, {}, result)
-    html = result[:output].to_html
-    users = html.scan(/user-mention">@(.+?)</)
-    users ? users.flatten.uniq : []
+    result[:mentioned_usernames]
   end
 
   def test_matches_usernames_in_body