public function testWorkerRecordsWhatItIsWorkingOn()
 {
     $worker = new Worker('jobs');
     $worker->registerWorker();
     $payload = array('class' => TestJob::className());
     $job = new Job('jobs', $payload);
     $worker->workingOn($job);
     $job = $worker->job();
     $this->assertEquals('jobs', $job['queue']);
     if (!isset($job['run_at'])) {
         $this->fail('Job does not have run_at time');
     }
     $this->assertEquals($payload, $job['payload']);
 }