Umbraco-CMS/src/Umbraco.Tests.Common/Extensions/ContentBaseExtensions.cs

using System;
using Umbraco.Core.Models;

namespace Umbraco.Tests.Testing
{
    public static class ContentBaseExtensions
    {
        /// <summary>
        /// Set property values by alias with an anonymous object.
        /// </summary>
        /// <remarks>Does not support variants.</remarks>
        public static void PropertyValues(this IContentBase content, object value, string culture = null, string segment = null)
        {
            if (value == null)
                throw new Exception("No properties has been passed in");

            var propertyInfos = value.GetType().GetProperties();
            foreach (var propertyInfo in propertyInfos)
            {
                if (!content.Properties.TryGetValue(propertyInfo.Name, out var property))
                    throw new Exception($"The property alias {propertyInfo.Name} is not valid, because no PropertyType with this alias exists");

                property.SetValue(propertyInfo.GetValue(value, null), culture, segment);
                //Update item with newly added value
                content.Properties.Add(property);
            }
        }
    }
}