class FakeFS::Pathname

def join(*args)


path0 + path1 + ... + pathN.
path0.join(path1, ..., pathN) is the same as

Pathname#join joins pathnames.
def join(*args)
  args.unshift self
  result = args.pop
  result = Pathname.new(result) unless result.is_a?(Pathname)
  return result if result.absolute?
  args.reverse_each do |arg|
    arg = Pathname.new(arg) unless arg.is_a?(Pathname)
    result = arg + result
    return result if result.absolute?
  end
  result
end