Add integration tests

tests/Umbraco.Tests.UnitTests/Umbraco.Core/Extensions/ReadOnlyUserGroupExtensions.cs

@@ -0,0 +1,42 @@
+using NUnit.Framework;
+using Umbraco.Cms.Core.Extensions;
+using Umbraco.Cms.Core.Models.Membership;
+using Umbraco.Cms.Tests.UnitTests.Umbraco.Core.ShortStringHelper;
+
+namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Core.Extensions;
+
+[TestFixture]
+public class ReadOnlyUserGroupExtensions
+{
+    private static int _swedishLanguageId = 1;
+    private static int _danishLanguageId = 2;
+    private static int _germanLanguageId = 3 ;
+
+    [Test]
+    public void CanCheckIfUserHasAccessToLanguage()
+    {
+        var userGrp = new UserGroup(new MockShortStringHelper());
+        userGrp.AddAllowedLanguage(_swedishLanguageId);
+        userGrp.AddAllowedLanguage(_danishLanguageId);
+
+        Assert.Multiple(() =>
+        {
+            Assert.IsTrue(userGrp.HasAccessToLanguage(_swedishLanguageId));
+            Assert.IsTrue(userGrp.HasAccessToLanguage(_danishLanguageId));
+            Assert.IsFalse(userGrp.HasAccessToLanguage(_germanLanguageId));
+        });
+    }
+
+    [Test]
+    public void CheckIfAllowedLanugagesIsEmptyMeansAccessToAllLanguages()
+    {
+        var userGrp = new UserGroup(new MockShortStringHelper());
+
+        Assert.Multiple(() =>
+        {
+            Assert.IsTrue(userGrp.HasAccessToLanguage(_swedishLanguageId));
+            Assert.IsTrue(userGrp.HasAccessToLanguage(_danishLanguageId));
+            Assert.IsTrue(userGrp.HasAccessToLanguage(_germanLanguageId));
+        });
+    }
+}