Pass wrapped class name to Sidekiq for logging purposes

Sidekiq logs the name of the job class being performed.  Because
ActiveJob wraps the class, this means every job logs as an AJ::JobWrapper
instead of the actual class name.

Will help fix mperham/sidekiq#2248

activejob/lib/active_job/queue_adapters/sidekiq_adapter.rb

@@ -18,17 +18,19 @@ module ActiveJob
       def enqueue(job) #:nodoc:
         #Sidekiq::Client does not support symbols as keys
         Sidekiq::Client.push \
-          'class' => JobWrapper,
-          'queue' => job.queue_name,
-          'args'  => [ job.serialize ]
+          'class'   => JobWrapper,
+          'wrapped' => job.class.to_s,
+          'queue'   => job.queue_name,
+          'args'    => [ job.serialize ]
       end
 
       def enqueue_at(job, timestamp) #:nodoc:
         Sidekiq::Client.push \
-          'class' => JobWrapper,
-          'queue' => job.queue_name,
-          'args'  => [ job.serialize ],
-          'at'    => timestamp
+          'class'   => JobWrapper,
+          'wrapped' => job.class.to_s,
+          'queue'   => job.queue_name,
+          'args'    => [ job.serialize ],
+          'at'      => timestamp
       end
 
       class JobWrapper #:nodoc:

activejob/test/integration/queuing_test.rb

@@ -1,5 +1,6 @@
 require 'helper'
 require 'jobs/logging_job'
+require 'jobs/hello_job'
 require 'active_support/core_ext/numeric/time'
 
 class QueuingTest < ActiveSupport::TestCase
@@ -23,6 +24,18 @@ class QueuingTest < ActiveSupport::TestCase
     end
   end
 
+  test 'should supply a wrapped class name to Sidekiq' do
+    skip unless adapter_is?(:sidekiq)
+    require 'sidekiq/testing'
+
+    Sidekiq::Testing.fake! do
+      ::HelloJob.perform_later
+      hash = ActiveJob::QueueAdapters::SidekiqAdapter::JobWrapper.jobs.first
+      assert_equal "ActiveJob::QueueAdapters::SidekiqAdapter::JobWrapper", hash['class']
+      assert_equal "HelloJob", hash['wrapped']
+    end
+  end
+
   test 'should not run job enqueued in the future' do
     begin
       TestJob.set(wait: 10.minutes).perform_later @id