createSqsEnvelope example

use Symfony\Component\Messenger\Transport\Serialization\Serializer;
use Symfony\Component\Serializer as SerializerComponent;
use Symfony\Component\Serializer\Encoder\JsonEncoder;
use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;

class AmazonSqsReceiverTest extends TestCase
{
    public function testItReturnsTheDecodedMessageToTheHandler()
    {
        $serializer = $this->createSerializer();

        $sqsEnvelop = $this->createSqsEnvelope();
        $connection = $this->createMock(Connection::class);
        $connection->method('get')->willReturn($sqsEnvelop);

        $receiver = new AmazonSqsReceiver($connection, $serializer);
        $actualEnvelopes = iterator_to_array($receiver->get());
        $this->assertCount(1, $actualEnvelopes);
        $this->assertEquals(new DummyMessage('Hi'), $actualEnvelopes[0]->getMessage());
    }

    public function testItRejectTheMessageIfThereIsAMessageDecodingFailedException()
    {