• Version: v5.10.1
• Platform: Darwin Kernel Version 15.3.0
• Subsystem: path

On OS X and Linux its perfectly legal to use dot '.' in directory name.
Currently path.extname and path.parse handle . in directory name as a file extension.

e.g.

ext.extname('/Users/Bob.Dev')
> '.Dev'

ext.parse('/Users/John.Smith')
> { root: '/',
  dir: '/Users',
  base: 'Bob.Dev',
  ext: '.Dev',
  name: 'Bob' }

I understand that path don't do any validation. But this behavior is confusing an error prone.