Loader
This project is an example of Rails autoloading behavior.
Check loader_test.rb for details.
On Rails 5.2 (the master branch), changing the order of the tests (eg. changing A) to C)) results
in a test failure, showing the potentially surprising behavior.
On Rails 6.0 (the rails6 branch), changing the order of the tests do not cause a test failure.
This behavior is not present in production environments where config.eager_load = true, but
can be a confusing case during development and test.