SortableIterator example

    public function getIterator(): \Iterator
    {
        if (0 === \count($this->dirs) && 0 === \count($this->iterators)) {
            throw new \LogicException('You must call one of in() or append() methods before iterating over a Finder.');
        }

        if (1 === \count($this->dirs) && 0 === \count($this->iterators)) {
            $iterator = $this->searchInDirectory($this->dirs[0]);

            if ($this->sort || $this->reverseSorting) {
                $iterator = (new Iterator\SortableIterator($iterator, $this->sort, $this->reverseSorting))->getIterator();
            }

            return $iterator;
        }

        $iterator = new \AppendIterator();
        foreach ($this->dirs as $dir) {
            $iterator->append(new \IteratorIterator(new LazyIterator(fn () => $this->searchInDirectory($dir))));
        }

        foreach ($this->iterators as $it) {
            

namespace Symfony\Component\Finder\Tests\Iterator;

use Symfony\Component\Finder\Iterator\SortableIterator;

class SortableIteratorTest extends RealIteratorTestCase
{
    public function testConstructor()
    {
        try {
            new SortableIterator(new Iterator([]), -255);
            $this->fail('__construct() throws an \InvalidArgumentException exception if the mode is not valid');
        } catch (\Exception $e) {
            $this->assertInstanceOf(\InvalidArgumentException::class, $e, '__construct() throws an \InvalidArgumentException exception if the mode is not valid');
        }
    }

    /** * @dataProvider getAcceptData */
    public function testAccept($mode, $expected)
    {