== Dir#ascend

  require 'facets/dir/ascend'

  path = 'A/B/C'

  tmp = []

  Dir.ascend(path) do |d|
    tmp << d
  end

  tmp.assert == %w{A/B/C A/B A}

Exclude current path.

  tmp = []

  Dir.ascend(path, false) do |d|
    tmp << d
  end
  
  tmp.assert == %w{A/B A}

