teardown

# File lib/rubygems/test_case.rb, line 372
  def teardown
    $LOAD_PATH.replace @orig_LOAD_PATH if @orig_LOAD_PATH
    if @orig_LOADED_FEATURES
      if @orig_LOAD_PATH
        paths = @orig_LOAD_PATH.map {|path| File.join(File.expand_path(path), "/")}
        ($LOADED_FEATURES - @orig_LOADED_FEATURES).each do |feat|
          unless paths.any? {|path| feat.start_with?(path)}
            $LOADED_FEATURES.delete(feat)
          end
        end
      else
        $LOADED_FEATURES.replace @orig_LOADED_FEATURES
      end
    end

    if @orig_BASERUBY
      RbConfig::CONFIG['BASERUBY'] = @orig_BASERUBY
    else
      RbConfig::CONFIG.delete('BASERUBY')
    end
    RbConfig::CONFIG['arch'] = @orig_arch

    if defined? Gem::RemoteFetcher then
      Gem::RemoteFetcher.fetcher = nil
    end

    Dir.chdir @current_dir

    FileUtils.rm_rf @tempdir unless ENV['KEEP_FILES']

    ENV.clear
    @orig_gem_env_requirements.each do |k,v|
      ENV[k] = v
    end

    ENV['GEM_HOME']   = @orig_gem_home
    ENV['GEM_PATH']   = @orig_gem_path
    ENV['GEM_VENDOR'] = @orig_gem_vendor
    ENV['GEM_SPEC_CACHE'] = @orig_gem_spec_cache
    ENV['RUBYGEMS_GEMDEPS'] = @orig_rubygems_gemdeps
    ENV['BUNDLE_GEMFILE']   = @orig_bundle_gemfile
    ENV['RUBYGEMS_HOST'] = @orig_rubygems_host

    Gem.ruby = @orig_ruby if @orig_ruby

    if @orig_ENV_HOME then
      ENV['HOME'] = @orig_ENV_HOME
    else
      ENV.delete 'HOME'
    end

    Gem.instance_variable_set :@default_dir, nil

    ENV['GEM_PRIVATE_KEY_PASSPHRASE'] = @orig_gem_private_key_passphrase

    Gem::Specification._clear_load_cache
    Gem::Specification.unresolved_deps.clear
    Gem::refresh

    @back_ui.close
  end