// Copyright (c) Umbraco.
// See LICENSE for more details.

using System;
using NUnit.Framework;
using Umbraco.Cms.Core;

namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Core
{
    public class GuidUtilsTests
    {
        [Test]
        public void GuidCombineMethodsAreEqual()
        {
            var a = Guid.NewGuid();
            var b = Guid.NewGuid();

            Assert.AreEqual(GuidUtils.Combine(a, b).ToByteArray(), Combine(a, b));
        }

        [Test]
        public void GuidThingTest()
        {
            var guid = new Guid("f918382f-2bba-453f-a3e2-1f594016ed3b");
            Assert.AreEqual("f22br4n0fm5fli5c", GuidUtils.ToBase32String(guid, 16));
            Assert.AreEqual("f22br4n0f", GuidUtils.ToBase32String(guid, 9));
        }

        // Reference implementation taken from original code.
        private static byte[] Combine(Guid guid1, Guid guid2)
        {
            var bytes1 = guid1.ToByteArray();
            var bytes2 = guid2.ToByteArray();
            var bytes = new byte[bytes1.Length];
            for (var i = 0; i < bytes1.Length; i++)
            {
                bytes[i] = (byte)(bytes1[i] ^ bytes2[i]);
            }

            return bytes;
        }
    }
}
