Elfs & Orcs Tower Defense

<?phpnamespace Tests;use App\Save\Progress;use JumPHP\Save\Storage;use PHPUnit\Framework\TestCase;final class ProgressTest extends TestCase{    public function testTheBestStarsAreSavedAndLoadedAgain(): void    {        $dir = sys_get_temp_dir() . '/eotd-progress-' . getmypid();        @mkdir($dir, 0777, true);        @unlink($dir . '/' . Progress::FILE);        $storage = new Storage($dir);        $progress = (new Progress())->load($storage);        self::assertSame(0, $progress->stars('elves', 'thornvale'));        $progress->record('elves', 'thornvale', 2);        $progress->record('elves', 'thornvale', 1);   // a worse result does not replace it        $again = (new Progress())->load(new Storage($dir));        self::assertSame(2, $again->stars('elves', 'thornvale'));        self::assertSame(2, $again->totalStars());        $again->record('elves', 'thornvale', 3);        self::assertSame(3, (new Progress())->load(new Storage($dir))->stars('elves', 'thornvale'));        @unlink($dir . '/' . Progress::FILE);    }}