dotnet/tests/CommunityToolkit.HighPerformance.UnitTests/Extensions/Test_NullableExtensions.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

#if NET5_0

using System.Numerics;
using CommunityToolkit.HighPerformance.Extensions;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace CommunityToolkit.HighPerformance.UnitTests.Extensions;

[TestClass]
public class Test_NullableExtensions
{
    [TestMethod]
    public void Test_NullableExtensions_DangerousGetReference()
    {
        static void Test<T>(T before, T after)
            where T : struct
        {
            T? nullable = before;
            ref T reference = ref nullable.DangerousGetValueOrDefaultReference();

            Assert.AreEqual(nullable!.Value, before);

            reference = after;

            Assert.AreEqual(nullable.Value, after);
        }

        Test(0, 42);
        Test(1.3f, 3.14f);
        Test(0.555, 8.49);
        Test(Vector4.Zero, new Vector4(1, 5.55f, 2, 3.14f));
        Test(Matrix4x4.Identity, Matrix4x4.CreateOrthographic(35, 88.34f, 9.99f, 24.6f));
    }
}

#endif