method
    
    file?
 
  file?(p1)
  public
  Returns true if the named file exists and is a regular file.
file can be an IO object.
If the file argument is a symbolic link, it will resolve the symbolic link and use the file referenced by the link.

 RSpec
RSpec Ruby on Rails
Ruby on Rails Ruby
Ruby 
   = private
 = private = protected
 = protected
  