MQTTnet/Source/MQTTnet.Tests/Helpers/ReflectionExtensions.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.

using System.Reflection;

namespace MQTTnet.Tests.Helpers;

public static class ReflectionExtensions
{
    public static object GetFieldValue(this object source, string fieldName)
    {
        ArgumentNullException.ThrowIfNull(source);

        var field = source.GetType().GetField(fieldName, BindingFlags.Instance | BindingFlags.NonPublic);
        if (field == null)
        {
            throw new ArgumentException($"Field {fieldName} not found.");
        }

        return field.GetValue(source);
    }
}