<?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 testNoExpire()
    {
        $cache = $this->_getCacheDriver();
        $cache->save('noexpire', 'value', 0);
        sleep(1);
        $this->assertTrue($cache->contains('noexpire'), 'Memcache provider should support no-expire');
    }

    public function testLongLifetime()
    {
        $cache = $this->_getCacheDriver();
        $cache->save('key', 'value', 30 * 24 * 3600 + 1);
        $this->assertTrue($cache->contains('key'), 'Memcache provider should support TTL > 30 days');
    }

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

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