public function testPerf()
 {
     for ($i = 0; $i < 100; ++$i) {
         // Queue list command
         $command = ['command' => 'list'];
         $this->queue->push($command);
         $this->queue->receive(10);
     }
 }
 public function testCountMessages()
 {
     $count1 = $this->queue->count();
     // Queue list command
     $command1 = ['command' => 'list'];
     $this->queue->push($command1);
     $count2 = $this->queue->count();
     $this->assertEquals($count1 + 1, $count2, 'countMessages retrieve added message');
 }