Jobs from Rails 4, which are wrapped with the ActiveJob wrapper class do not show up in the timestamps results from the scheduled_at() function

Test case for this:

class ActiveJobTest < ActiveJob::Base
  queue_as :test_queue

  def self.queue
    queue_name
  end

  def perform; end
end

timestamp = 5.minutes.from_now
ActiveJobTest.set(wait_until: timestamp).perform_later

klass = ActiveJob::QueueAdapters::ResqueAdapter::JobWrapper
jobs = Resque.delayed_timestamp_peek(timestamp, 0 ,1)
# something like [{"job_class":"SummaryEmailsJob","job_id":"c4407182-f824-4105-814b-7535247e5f91","queue_name":"summary_emails","arguments":[]}]
args = jobs.first['args'] 
@timestamps = Resque.scheduled_at(klass, *args)

This fails to return the job timestamp, because line 220 of delayed_extension.rb does this: search = encode(job_to_hash(klass, args)), which then calls queue_from_class(klass) later on. Because the ActiveJob wrapper does not know the queue name of the wrapped job class, queue_from_class returns false, which then causes the search to fail as the queue names don't match.

Not sure if the solution is to make a special case for ActiveJob or not. Feels hacky.

Start at delayed_extension.rb line 220 and trace scheduled_at through job_to_hash and queue_from_class for ActiveJob::QueueAdapters::ResqueAdapter::JobWrapper. Reproduce the ActiveJob example in the issue and inspect how the wrapped queue name is handled. Done means scheduled_at returns the timestamp for the wrapped job without breaking regular Resque job lookups.