getHandlerName example

use Symfony\Component\Messenger\Handler\HandlerDescriptor;
use Symfony\Component\Messenger\Stamp\HandledStamp;
use Symfony\Component\Messenger\Tests\Fixtures\DummyCommandHandler;

class HandledStampTest extends TestCase
{
    public function testConstruct()
    {
        $stamp = new HandledStamp('some result', 'FooHandler::__invoke()');

        $this->assertSame('some result', $stamp->getResult());
        $this->assertSame('FooHandler::__invoke()', $stamp->getHandlerName());

        $stamp = new HandledStamp('some result', 'FooHandler::__invoke()');

        $this->assertSame('some result', $stamp->getResult());
        $this->assertSame('FooHandler::__invoke()', $stamp->getHandlerName());
    }

    public function testFromDescriptor()
    {
        $stamp = HandledStamp::fromDescriptor(new HandlerDescriptor(new DummyCommandHandler()), 'some_result');

        

 elseif ($ack->getError()) {
                        throw $ack->getError();
                    } else {
                        $result = $ack->getResult();
                    }
                } else {
                    $result = $this->callHandler($handler, $message, null, $envelope->last(HandlerArgumentsStamp::class));
                }

                $handledStamp = HandledStamp::fromDescriptor($handlerDescriptor, $result);
                $envelope = $envelope->with($handledStamp);
                $this->logger?->info('Message {class} handled by {handler}', $context + ['handler' => $handledStamp->getHandlerName()]);
            } catch (\Throwable $e) {
                $exceptions[] = $e;
            }
        }

        /** @var FlushBatchHandlersStamp $flushStamp */
        if ($flushStamp = $envelope->last(FlushBatchHandlersStamp::class)) {
            /** @var NoAutoAckStamp $stamp */
            foreach ($envelope->all(NoAutoAckStamp::class) as $stamp) {
                try {
                    $handler = $stamp->getHandlerDescriptor()->getBatchHandler();
                    

        $envelope = $this->messageBus->dispatch($message);
        /** @var HandledStamp[] $handledStamps */
        $handledStamps = $envelope->all(HandledStamp::class);

        if (!$handledStamps) {
            throw new LogicException(sprintf('Message of type "%s" was handled zero times. Exactly one handler is expected when using "%s::%s()".', get_debug_type($envelope->getMessage()), static::class, __FUNCTION__));
        }

        if (\count($handledStamps) > 1) {
            $handlers = implode(', ', array_map(fn (HandledStamp $stamp): string => sprintf('"%s"', $stamp->getHandlerName()), $handledStamps));

            throw new LogicException(sprintf('Message of type "%s" was handled multiple times. Only one handler is expected when using "%s::%s()", got %d: %s.', get_debug_type($envelope->getMessage()), static::class, __FUNCTION__, \count($handledStamps), $handlers));
        }

        return $handledStamps[0]->getResult();
    }
}