Cucumber step definition checking content of directory

files_tree_steps.rb

# Usage:
#
#  Then directory "tmp/sample" should have the following tree:
#      """
#        monday
#        | beer.rb
#        tuesday
#        | vodka.php
#        | wine.rb
#        wednesday
#        | afternoon
#        | | black.out
#        | evening
#        | | pain.php
#        | | sleep.rb
#      """

Then /^directory "([^"]*)" should have the following tree:$/ do |directory, text|
  expected_files_tree = ""
  text.each_line {|line| expected_files_tree << line.strip << "\n" }
  current_files_tree = dir_to_files_tree(directory)
  current_files_tree.should == expected_files_tree
end

def dir_to_files_tree(directory, level = 0)
  file_tree = ""
  
  Dir.glob(File.join(directory, "*")).sort.each do |file|
    next if file =~ /^\./
    
    file_tree << ("| "*level + File.basename(file)) << "\n"
    if File.directory?(file)
      file_tree << dir_to_files_tree(file, level + 1)
    end
  end
  file_tree
end