added render_pings helper test

Author: Oaphi

test/helpers/comments_helper_test.rb

@@ -1,6 +1,8 @@
 require 'test_helper'
 
 class CommentsHelperTest < ActionView::TestCase
+  include ApplicationHelper
+  include UsersHelper
   include Devise::Test::ControllerHelpers
 
   test '[help center] and [help] substitution' do
@@ -108,4 +110,20 @@ class CommentsHelperTest < ActionView::TestCase
       assert_nil limit_message
     end
   end
+
+  test 'render_pings should correctly render comment pings' do
+    std = users(:standard_user)
+    mod = users(:moderator)
+
+    sign_in std
+
+    host = RequestContext.community.host
+
+    rendered = render_pings("this is not correct, @##{std.id}. @##{mod.id}'s answer is better. @#123, thoughs?",
+                            host: host)
+
+    assert Regexp.new("http:\\/\\/#{Regexp.escape(host)}\\/users\\/#{std.id}").match?(rendered)
+    assert Regexp.new("http:\\/\\/#{Regexp.escape(host)}\\/users\\/#{mod.id}").match?(rendered)
+    assert(/@#123/.match?(rendered))
+  end
 end