public function testPurgeQueue()
 {
     $queue = $this->createQueue();
     $exchange = new Exchange();
     $exchange->name = self::EXCHANGE_TEST_NAME;
     $exchange->vhost = '/';
     $this->object->addExchange($exchange);
     $binding = new Binding();
     $binding->vhost = '/';
     $binding->source = self::EXCHANGE_TEST_NAME;
     $binding->destination = self::QUEUE_TEST_NAME;
     $binding->routing_key = self::QUEUE_TEST_NAME;
     $this->object->addBinding($binding);
     $message = json_encode(array('properties' => array(), 'routing_key' => self::QUEUE_TEST_NAME, 'payload' => 'body', 'payload_encoding' => 'string'));
     $n = 12;
     while ($n > 0) {
         $this->client->post('/api/exchanges/' . urlencode('/') . '/' . self::EXCHANGE_TEST_NAME . '/publish', array('content-type' => 'application/json'), $message)->send();
         $n--;
     }
     usleep(2000000);
     $this->object->refreshQueue($queue);
     $this->assertEquals(12, $queue->messages_ready);
     $this->object->purgeQueue('/', self::QUEUE_TEST_NAME);
     usleep(4000000);
     $this->object->refreshQueue($queue);
     $this->assertEquals(0, $queue->messages_ready);
 }