The patched test assumed the file system is case-sensitive, but that is not necessarily the case. In particular, this test did not pass in the recommended setup for the dev box, because the /vagrant shared folder is case-insensitive. After looking at some gems that provide access to file system metadata I have chosen to go with the check you can see in the patch because, albeit it's a bit dirty creating a file, it is super easy to understand and clearly portable. References rails/rails-dev-box#102.
`div_for` removed in 01e94ef
…l be supported only