Before this commit paths of mounted engines are not traversed
when `assert_recognizes` is called, causing strange test results.
This commit enable to traverse mounted paths.
assert_routing was not raising the message passed into the assertion
violation that it raised. This change propagates messages through
the on_fail error.
This fixes this error:
https://github.com/rails/rails/issues/14908
A test case for this issue is located here.
https://github.com/estsauver/test14908
To see that test case fail in the example app, just run
ruby -Itest test/controllers/guests_controller_test.rb
Before this change, assert_recognizes, assert_generates, and
assert_routing raised ActionController::RoutingError when they failed to
recognize the route.
This commit changes them to raise Assertion instead. This aligns with
convention for logical failures, and supports reporting tools that care
about the difference between logical failures and errors e.g. the
summary at the end of a test run.
- Fixes#5899
