Phalcon\Test\Unit\Cache\Backend\MemcacheCest::queryKeys PHP Method

    public function queryKeys(UnitTester $I)
    {
        $I->wantTo('Get cache keys by using Memcache as cache backend');
        $cache = new Memcache(new Data(['lifetime' => 20]), ['host' => TEST_MC_HOST, 'port' => TEST_MC_PORT, 'statsKey' => '_PHCM']);
        $I->haveInMemcached('_PHCM' . 'a', 1);
        $I->haveInMemcached('_PHCM' . 'b', 2);
        $I->haveInMemcached('_PHCM' . 'c', 3);
        $I->haveInMemcached('_PHCM', ['a' => 20, 'b' => 20, 'c' => 20]);
        $keys = $cache->queryKeys();
        sort($keys);
        $I->assertEquals($keys, ['a', 'b', 'c']);
        $I->clearMemcache();
    }