The path module's `join, normalize, isAbsolute, relative and resolve`
functions return/use the current directory if they are passed zero
length strings.
> process.version
'v2.3.4-pre'
> path.win32.join('')
'.'
> path.posix.join('')
'.'
> path.win32.normalize('')
'.'
> path.posix.normalize('')
'.'
> path.win32.isAbsolute('')
false
> path.posix.isAbsolute('')
false
> path.win32.relative('', '')
''
> path.posix.relative('', '')
''
> path.win32relative('.', '')
''
> path.posix.relative('.', '')
''
> path.posix.resolve('')
'/home/thefourtheye/Desktop'
> path.win32.resolve('')
'\\home\\thefourtheye\\Desktop'
Since empty paths are not valid in any of the operating systems people
normally use, this behaviour might be a surprise to the users. This
commit introduces "Notes" about this, wherever applicable in `path`'s
documentation.
The tests makes sure that the behaviour is intact between
commits.
PR-URL: https://github.com/nodejs/io.js/pull/2106
Reviewed-By: Rich Trott <rtrott@gmail.com>
