public function testTimestampPassedIfTtlBiggerThan30Days($key, $value, $ttl)
{
$method = (new \ReflectionClass($this->store))->getMethod('prepareTtl');
$method->setAccessible(true);
$prepared_ttl = $method->invokeArgs($this->store, [$ttl]);
// value can be either lower than 30 days or set to unix timestamp in the future
$this->assertTrue($prepared_ttl <= MemcachedStore::MAX_TTL || $prepared_ttl >= time());
}