# File lib/rubygems/mirror/test_setup.rb, line 116
    def setup_mirrorrc
      @mirror_path = Dir.mktmpdir("test_gem_mirror_path_#{$$}")
      @mirrorrc = Tempfile.new('testgemmirrorrc')
      opts = {
        'mirrors' => {
          'from' => "http://127.0.0.1:8808/", 'to' => @mirror_path
        }
      }
      @mirrorrc.write YAML.dump(opts)
      @mirrorrc_path = @mirrorrc.path
    end