    public function classSetUp()
    {
        $this->fastPriorityQueue = new FastPriorityQueue();
        $this->priorityQueue     = new PriorityQueue();

        for ($i = 0; $i < 1000; $i += 1) {
            $priority = rand(1, 100);
            $this->fastPriorityQueue->insert('foo', $priority);
            $this->priorityQueue->insert('foo', $priority);
        }
    }