Working with different filesystems

I think Node provides objective access to the filesystem, representing it as it is, without getting in the way. From there, I use a module to test filesystem behavior, and use several comparison functions depending on the behavior of the filesystem.

Much also depends on the nature of your application, this determines how you would want to probe or work with the filesystem. For example, do you create a test filename to see the exact NFD form that HFS+ uses or estimate it if this is not critical to the task at hand.