MenuTestCase::doMenuTests in core/modules/menu/tests/menu.test

Test menu functionality using main-menu menu.

MenuTestCase::testMenu in core/modules/menu/tests/menu.test

Login users, add menus and menu links, and test menu functionality through the admin and user interfaces.

MenuTestCase::testMenuQueryAndFragment in core/modules/menu/tests/menu.test

Add and remove a menu link with a query string and fragment.