<?php

namespace Doctrine\Tests\Common\Cache;

use Doctrine\Common\Cache\MemcacheCache;
use Memcache;

/**
 * @requires extension memcache
 */
class MemcacheCacheTest extends CacheTest
{
    private $memcache;

    protected function setUp()
    {
        $this->memcache = new Memcache();

        if (@$this->memcache->connect('localhost', 11211) === false) {
            unset($this->memcache);
            $this->markTestSkipped('Cannot connect to Memcache.');
        }
    }

    protected function tearDown()
    {
        if ($this->memcache instanceof Memcache) {
            $this->memcache->flush();
        }
    }

    /**
     * {@inheritdoc}
     *
     * Memcache does not support " " and null byte as key so we remove them from the tests.
     */
    public function provideCacheIds()
    {
        $ids = parent::provideCacheIds();
        unset($ids[21], $ids[22]);

        return $ids;
    }

    public function testGetMemcacheReturnsInstanceOfMemcache()
    {
        $this->assertInstanceOf('Memcache', $this->_getCacheDriver()->getMemcache());
    }

    /**
     * {@inheritDoc}
     */
    protected function _getCacheDriver()
    {
        $driver = new MemcacheCache();
        $driver->setMemcache($this->memcache);
        return $driver;
    }
}