Package Auto-Discovery - how it works?

[asamofal]

Hi there!
Please, correct me where I'm wrong.
In my composer.json I have these settings:

    "extra": {
        "laravel": {
            "providers": [
                "Getsno\\Relesys\\RelesysServiceProvider"
            ],
            "aliases": {
                "Relesys": "Getsno\\Relesys\\Facades\\RelesysFacade"
            }
        }
    }

In my TestCase.php I've set:

protected $enablesPackageDiscoveries = true;

Then I created a test inherits my TestCase, my expectation was that my service provider and facade should be available in my test. But it's not, so I have to use getPackageProviders and getPackageAliases methods.

Am I wrong that the auto-discovery function option should process the settings from the extra node while Laravel bootstrapping?