Task

Verify that a file called     input.txt     and   a directory called     docs     exist.



This should be done twice:  

   once for the current working directory,   and
   once for a file and a directory in the filesystem root.


Optional criteria (May 2015):   verify it works with:

   zero-length files
   an unusual filename:     `Abdu'l-Bahá.txt  


File.exists("input.txt")  //--> True (in this case a sym link)
File.exists("/input.txt") //-->False
File.isDir("/")     //-->True
File.isDir("docs")  //-->False
 