I'm testing a web application with subdomain routing with Laravel Dusk. I have some redirection between subdomain, if some kind of verification is invalid. 

So, my goal is to `visit` an URL `$a` then assert that I was redirected and the new URL is `$b`.

I can do:

```
$browser->visit($a);

```

But I don't know what to do right after to check what the current URL is.