DominionEnterprises\Mongo\QueueTest::ack PHP Method

    public function ack()
    {
        $messageOne = ['key1' => 0, 'key2' => true];
        $this->queue->send($messageOne);
        $this->queue->send(['key' => 'value']);
        $result = $this->queue->get($messageOne, PHP_INT_MAX, 0);
        $this->assertSame(2, $this->collection->count());
        $this->queue->ack($result);
        $this->assertSame(1, $this->collection->count());
    }