public function save(UnitTester $I)
{
$I->wantTo('Save data by using Redis as cache backend');
$key = '_PHCR' . 'data-save';
$data = [uniqid(), gethostname(), microtime(), get_include_path(), time()];
$cache = new Redis(new Data(['lifetime' => 20]), ['host' => TEST_RS_HOST, 'port' => TEST_RS_PORT]);
$I->dontSeeInRedis($key);
$cache->save('data-save', $data);
$I->seeInRedis($key, serialize($data));
$data = 'sure, nothing interesting';
$I->dontSeeInRedis($key, serialize($data));
$cache->save('data-save', $data);
$I->seeInRedis($key, serialize($data));
}