public function prefixedQueryKeys(UnitTester $I)
{
$I->wantTo('Get prefixed cache keys by using APC(u) as cache backend');
$prefix = 'app-data';
$cache = new Apc(new Data(['lifetime' => 20]), ['prefix' => $prefix]);
$key1 = '_PHCA' . 'app-data' . 'data-key-1';
$key2 = '_PHCA' . 'app-data' . 'data-key-2';
$key3 = '_PHCA' . 'data-key-3';
$I->haveInApc([$key1 => 1, $key2 => 2, $key3 => 3], null);
$keys = $cache->queryKeys($prefix);
sort($keys);
$I->assertEquals($keys, ['app-datadata-key-1', 'app-datadata-key-2']);
}
