MailboxListHeader example

        return $this->lineLength;
    }

    /** * @param array<Address|string> $addresses * * @return $this */
    public function addMailboxListHeader(string $name, array $addresses): static
    {
        return $this->add(new MailboxListHeader($name, Address::createArray($addresses)));
    }

    /** * @return $this */
    public function addMailboxHeader(string $name, Address|string $address): static
    {
        return $this->add(new MailboxHeader($name, Address::create($address)));
    }

    /** * @return $this */

        return $this->lineLength;
    }

    /** * @param array<Address|string> $addresses * * @return $this */
    public function addMailboxListHeader(string $name, array $addresses): static
    {
        return $this->add(new MailboxListHeader($name, Address::createArray($addresses)));
    }

    /** * @return $this */
    public function addMailboxHeader(string $name, Address|string $address): static
    {
        return $this->add(new MailboxHeader($name, Address::create($address)));
    }

    /** * @return $this */

use PHPUnit\Framework\TestCase;
use Symfony\Component\Mime\Address;
use Symfony\Component\Mime\Header\MailboxListHeader;

class MailboxListHeaderTest extends TestCase
{
    // RFC 2822, 3.6.2 for all tests
    public function testMailboxIsSetForAddress()
    {
        $header = new MailboxListHeader('From', [new Address('chris@swiftmailer.org')]);
        $this->assertEquals(['chris@swiftmailer.org'], $header->getAddressStrings());
    }

    public function testMailboxIsRenderedForNameAddress()
    {
        $header = new MailboxListHeader('From', [new Address('chris@swiftmailer.org', 'Chris Corbyn')]);
        $this->assertEquals(['Chris Corbyn <chris@swiftmailer.org>'], $header->getAddressStrings());
    }

    public function testAddressCanBeReturnedForAddress()
    {
        

$headers = new Headers();
        $headers->addTextHeader('X-Test', 'some@id');
        $headers->addTextHeader('X-Test', 'other@id');
        $headers->addTextHeader('X-Test', 'more@id');
        $this->assertEquals([$header0, $header1, $header2], iterator_to_array($headers->all('X-Test')));
    }

    public function testAllReturnsAllHeadersIfNoArguments()
    {
        $header0 = new IdentificationHeader('Message-ID', 'some@id');
        $header1 = new UnstructuredHeader('Subject', 'thing');
        $header2 = new MailboxListHeader('To', [new Address('person@example.org')]);
        $headers = new Headers();
        $headers->addIdHeader('Message-ID', 'some@id');
        $headers->addTextHeader('Subject', 'thing');
        $headers->addMailboxListHeader('To', [new Address('person@example.org')]);
        $this->assertEquals(['message-id' => $header0, 'subject' => $header1, 'to' => $header2], iterator_to_array($headers->all()));
    }

    public function testAllReturnsEmptyArrayIfNoneSet()
    {
        $headers = new Headers();
        $this->assertEquals([], iterator_to_array($headers->all('Received')));
    }

$listener = new MessageListener($defaultHeaders, null, $rules);
        $event = new MessageEvent($message, new Envelope(new Address('sender@example.com'), [new Address('recipient@example.com')]), 'smtp');
        $listener->onMessage($event);

        $this->assertEquals($expectedHeaders, $event->getMessage()->getHeaders());
    }

    public static function provideHeaders(): iterable
    {
        $initialHeaders = new Headers();
        $defaultHeaders = (new Headers())
            ->add(new MailboxListHeader('from', [new Address('from-default@example.com')]))
        ;
        yield 'No defaults, all headers copied over' => [$initialHeaders, $defaultHeaders, $defaultHeaders];

        $initialHeaders = new Headers();
        $defaultHeaders = (new Headers())
            ->add(new UnstructuredHeader('foo', 'bar'))
            ->add(new UnstructuredHeader('bar', 'foo'))
        ;
        yield 'No defaults, default is to set if empty' => [$initialHeaders, $defaultHeaders, $defaultHeaders];

        $initialHeaders = (new Headers())
            

$this->assertTrue($headers->has('Message-ID'));
        $this->assertTrue($headers->has('Date'));
        $this->assertFalse($headers->has('Bcc'));
    }

    public function testGetPreparedHeaders()
    {
        $message = new Message();
        $message->getHeaders()->addMailboxListHeader('From', ['fabien@symfony.com']);
        $h = $message->getPreparedHeaders();
        $this->assertCount(4, iterator_to_array($h->all()));
        $this->assertEquals(new MailboxListHeader('From', [new Address('fabien@symfony.com')]), $h->get('From'));
        $this->assertEquals(new UnstructuredHeader('MIME-Version', '1.0'), $h->get('mime-version'));
        $this->assertTrue($h->has('Message-Id'));
        $this->assertTrue($h->has('Date'));

        $message = new Message();
        $message->getHeaders()->addMailboxListHeader('From', ['fabien@symfony.com']);
        $message->getHeaders()->addDateHeader('Date', $n = new \DateTimeImmutable());
        $this->assertEquals($n, $message->getPreparedHeaders()->get('Date')->getDateTime());

        $message = new Message();
        $message->getHeaders()->addMailboxListHeader('From', ['fabien@symfony.com']);