[Turbo] TurboStreamListenRenderer service doesn't register correctly when Mercure Hub is mocked

[milankaranovic]

Hey everyone! 👋🏻

I updated symfony/ux-turbo from v2.23.0 to 2.25.2 and my tests (WebTestCase) started failing with this error

ErrorException: An exception has been thrown during the rendering of a template 
("Too few arguments to function Symfony\UX\Turbo\Bridge\Mercure\TurboStreamListenRenderer::__construct(), 
3 passed in /app/var/cache/test/ContainerO3ffV3d/getTurbo_Mercure_Default_RendererService.php
 on line 31 and exactly 4 expected") in "foo.html.twig" at line 31.

On line 31 is turbo_stream_listen.

Additionally, I havemercure.hub.default mocked according to these instructions https://symfony.com/doc/current/mercure.html#testing

I see that this PR #2447 has been merged in v2.24.0, and a lot of things related to turbo_stream_listen has changed, including RegisterMercureHubsPass. It loops through mercure.hub tags, so I ended up with this solution

# config/services_test.yaml
services:
    mercure.hub.default:
        class: Tests\Services\MockMercureHub
        tags:
            - 'mercure.hub'

Reporting this because I'm not sure if this is a bug or if the documentation has to be updated.