FEATURE TESTS - are for most of the tests of the site/app, it's page content, notifications, and anything that has visible/viewable content
and
UNIT TESTS - are for inside mechanisms: actions, helpers, services, etc, that are not reachable by any route, but plays their role inside - like: currency converters, pdf generators, webhook parsers, router, etc?
Is it that:
FEATURE TESTS - are for most of the tests of the site/app, it's page content, notifications, and anything that has visible/viewable content
and
UNIT TESTS - are for inside mechanisms: actions, helpers, services, etc, that are not reachable by any route, but plays their role inside - like: currency converters, pdf generators, webhook parsers, router, etc?