# Symuluje przesany plik
  # Pochodzi z http://wiki.rubyonrails.org/rails/pages/HowtoUploadFiles
  def uploaded_file(filename, content_type)
    t = Tempfile.new(filename)
    t.binmode
    path = RAILS_ROOT + "/test/fixtures/" + filename
    FileUtils.copy_file(path, t.path)
    (class << t; self; end).class_eval do
      alias local_path path
      define_method(:original_filename) {filename}
      define_method(:content_type) {content_type}
    end
   return t
  end

