public function testMultiSet()
{
$driver = $this->getRedisDriver();
$key = 'test:multi:' . rand(10000, 99999);
$driver->persist($key, new SerialisedData('xxxx', 'foo'));
$driver->persist($key, new SerialisedData('xxxx', 'bar'));
$driver->flush();
$this->assertEquals('bar', $driver->retrieve($key)->getData());
}