# File lib/fakefs/globber.rb, line 6
    def expand(pattern)
      pattern = pattern.to_s

      return [pattern] if pattern[0] != '{' || pattern[-1] != '}'

      part = ''
      result = []

      each_char_with_levels pattern, '{', '}' do |chr, level|
        case level
        when 0
          case chr
          when '{'
            # noop
          else
            part << chr
          end
        when 1
          case chr
          when ','
            result << part
            part = ''
          when '}'
            # noop
          else
            part << chr
          end
        else
          part << chr
        end
      end

      result << part

      result
    end