DummyTransport example

    public function testFromString(string $dsn, TransportInterface $transport)
    {
        $transportFactory = new Transport([new DummyTransportFactory()]);

        $this->assertEquals($transport, $transportFactory->fromString($dsn));
    }

    public static function fromStringProvider(): iterable
    {
        $transportA = new DummyTransport('a');
        $transportB = new DummyTransport('b');

        yield 'simple transport' => [
            'dummy://a',
            $transportA,
        ];

        yield 'failover transport' => [
            'failover(dummy://a dummy://b)',
            new FailoverTransport([$transportA, $transportB]),
        ];