Add a test with a profile with a config/sync directory

Looked into this now. Core's InstallerConfigDirectoryTestBase really is a bit strange, at the very least for our use-case here. I realized that we were previously not really testing what I thought we were. At the very least you could previously write a test that seemingly would install Standard profile from existing configuration. That is currently not possible and only works in the test because InstallerConfigDirectoryTestBase creates a fake test profile in the site-specific profiles directory.

So will first open an MR to fix that which will hopefully allow adding some test coverage with a profile with a config/sync directory more easily next.

OK, looks good now.

Will add some docs for the config_sync_directory workaround over in 📌 Add explanation of how various scenarios are handled to README Active . Marking fixed.

Automatically closed - issue fixed for 2 weeks with no activity.