You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: test_win32.rb
    path of file: ./repos/jruby/test/jruby
    
    the code of the file until where you have to start completion: require 'test/unit'
require 
    
    def test_win32_registry
      require 'win32/registry'
        Win32::Registry::HKEY_CURRENT_USER.open('Environment', Win32::Registry::KEY_ALL_ACCESS) do |reg|
          # we assume that HKEY_CURRENT_USER\\Environment\\TMP is present in registry
          assert_not_nil reg['TMP']
      end
    end