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: registry_test.go
    path of file: ./repos/minicron/client/vendor/golang.org/x/sys/windows/registry
    
    the code of the file until where you have to start completion: // Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// +build windows

package registry_test

import (
	"bytes"
	"crypto/rand"
	"os"
	"syscall"
	"testing"
	"time"
	"unsafe"

	"golang.org/x/sys/windows/registry"
)

func randKeyName(prefix string) string {
	const numbers = "0123456789"
	buf := make([]byte, 10)
	rand.Read(buf)
	for i, b := range buf {
		buf[i] = numbers[b%byte(len(numbers))]
	}
	return prefix + string(buf)
}

func TestReadSubKeyNames(t *testing.T) {
	k, err := registry.OpenKey(registry.CLASSES_ROOT, "TypeLib", registry.ENUMERATE_SUB_KEYS|registry.QUERY_VALUE)
	if err != nil {
	
    
func setValues(t *testing.T, k registry.Key) {
	for _, test := range ValueTests {
		var err error
		switch test.Type {
		case registry.SZ:
			err = k.SetStringValue(test.Name, test.Value.(string))
		case registry.EXPAND_SZ:
			err = k.SetExpandStringValue(test.Name, test.Value.(string))
		case registry.MULTI_SZ:
			err = k.SetStringsValue(test.Name, test.Value.([]string))
		case registry.BINARY:
			err = k.SetBinaryValue(test.Name, test.Value.([]byte))
		case registry.DWORD:
			err = k.SetDWordValue(test.Name, uint32(test.Value.(uint64)))
		case registry.QWORD:
			err = k.SetQWordValue(test.Name, test.Value.(uint64))
		default:
			t.Fatalf("unsupported type %d for %s value", test.Type, test.Name)
		}
		if test.WillFail {
			if err == nil {
				t.Fatalf("setting %s value %q should fail, but succeeded", test.Name, test.Value)
			}
		} else {
			if err != nil {
				t.Fatal(err)
			}
		}
	}
}