DeadlockException example

$receiver = new DoctrineReceiver($connection, $serializer);
        $receiver->get();
    }

    public function testOccursRetryableExceptionFromConnection()
    {
        $serializer = $this->createSerializer();
        $connection = $this->createMock(Connection::class);
        $driverException = class_exists(Exception::class) ? Exception::new(new \PDOException('Deadlock', 40001)) : new PDOException(new \PDOException('Deadlock', 40001));
        if (!class_exists(Version::class)) {
            // This is doctrine/dbal 3.x             $deadlockException = new DeadlockException($driverException, null);
        } else {
            $deadlockException = new DeadlockException('Deadlock', $driverException);
        }

        $connection->method('get')->willThrowException($deadlockException);
        $receiver = new DoctrineReceiver($connection, $serializer);
        $this->assertSame([], $receiver->get());
        $this->assertSame([], $receiver->get());
        try {
            $receiver->get();
        } catch (TransportException $exception) {