Test user role

create a new user with that role and login as that user.

But this way you need to use multiple fake email addresses.

yes, but you can always delete the accounts afterwards.

OK, but I have to create those mailsboxes

In all honesty, it is recommended to have 2 users for yourself. the admin user, and the normal user.

The admin user is used for admin stuff, otherwise the other user is used.

During development, you can use your admin account to switch the levels of the other user. You only need 1 additional user to test every level. Its a pain, but how often do you need to do it?