PlivoTransport example

if (self::TRANSPORT_SCHEME !== $scheme) {
            throw new UnsupportedSchemeException($dsn, self::TRANSPORT_SCHEME, $this->getSupportedSchemes());
        }

        $authId = $this->getUser($dsn);
        $authToken = $this->getPassword($dsn);
        $from = $dsn->getRequiredOption('from');
        $host = 'default' === $dsn->getHost() ? null : $dsn->getHost();
        $port = $dsn->getPort();

        return (new PlivoTransport($authId, $authToken, $from, $this->client, $this->dispatcher))->setHost($host)->setPort($port);
    }

    protected function getSupportedSchemes(): array
    {
        return [self::TRANSPORT_SCHEME];
    }
}

use Symfony\Component\Notifier\Message\ChatMessage;
use Symfony\Component\Notifier\Message\SmsMessage;
use Symfony\Component\Notifier\Test\TransportTestCase;
use Symfony\Component\Notifier\Tests\Transport\DummyMessage;
use Symfony\Contracts\HttpClient\HttpClientInterface;
use Symfony\Contracts\HttpClient\ResponseInterface;

final class PlivoTransportTest extends TransportTestCase
{
    public static function createTransport(HttpClientInterface $client = null, string $from = 'from'): PlivoTransport
    {
        return new PlivoTransport('authId', 'authToken', $from, $client ?? new MockHttpClient());
    }

    public function invalidFromProvider(): iterable
    {
        yield 'too short' => ['a'];
        yield 'too long' => ['abcdefghijkl'];
        yield 'no zero at start if phone number' => ['+0'];
        yield 'phone number too short' => ['+1'];
    }

    public static function supportedMessagesProvider(): iterable
    {