MessageListener example

public function testNotRenderedTemplatedEmail()
    {
        $this->expectException(LogicException::class);

        $transport = new NullTransport(new EventDispatcher());
        $transport->send((new TemplatedEmail())->htmlTemplate('Some template'));
    }

    public function testRenderedTemplatedEmail()
    {
        $transport = new NullTransport($dispatcher = new EventDispatcher());
        $dispatcher->addSubscriber(new MessageListener(null, new BodyRenderer(new Environment(new ArrayLoader(['tpl' => 'Some message'])))));

        $sentMessage = $transport->send((new TemplatedEmail())->to('me@example.com')->from('me@example.com')->htmlTemplate('tpl'));
        $this->assertMatchesRegularExpression('/Some message/', $sentMessage->getMessage()->toString());
    }

    public function testRejectMessage()
    {
        $dispatcher = new EventDispatcher();
        $dispatcher->addListener(MessageEvent::class, fn (MessageEvent $event) => $event->reject(), 255);
        $dispatcher->addListener(MessageEvent::class, fn () => throw new \RuntimeException('Should never be called.'));

        

use Symfony\Component\Mime\Header\UnstructuredHeader;
use Symfony\Component\Mime\Message;

class MessageListenerTest extends TestCase
{
    /** * @dataProvider provideHeaders */
    public function testHeaders(Headers $initialHeaders, Headers $defaultHeaders, Headers $expectedHeaders, array $rules = MessageListener::DEFAULT_RULES)
    {
        $message = new Message($initialHeaders);
        $listener = new MessageListener($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')]))
        ;