Umbraco-CMS/tests/Umbraco.Tests.UnitTests/Umbraco.Core/EmbeddedResources/LanguageXmlTests.cs

using System.IO;
using System.Linq;
using System.Xml;
using Microsoft.Extensions.FileProviders;
using NUnit.Framework;
using Umbraco.Cms.Core.Composing;

namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Core.EmbeddedResources
{
    [TestFixture]
    public class LanguageXmlTests
    {
        [Test]
        public void Can_Load_Language_Xml_Files()
        {
            var readFilesCount = 0;
            var xmlDocument = new XmlDocument();

            var languageProvider = new EmbeddedFileProvider(typeof(IAssemblyProvider).Assembly, "Umbraco.Cms.Core.EmbeddedResources.Lang");
            var files = languageProvider.GetDirectoryContents(string.Empty)
                                    .Where(x => !x.IsDirectory && x.Name.EndsWith(".xml"));

            foreach (var languageFile in files)
            {
                using var stream = new StreamReader(languageFile.CreateReadStream());

                // Load will throw an exception if the XML isn't valid.
                xmlDocument.Load(stream);
                readFilesCount++;
            }

            // Ensure that at least one file was read.
            Assert.AreNotEqual(0, readFilesCount);
        }
    }
}