Core.Strings - refactor + new IShortStringHelper

src/Umbraco.Tests/CoreStrings/ShortStringHelperResolverTest.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Security;
+using System.Text;
+using NUnit.Framework;
+using Umbraco.Core;
+using Umbraco.Core.Strings;
+using Umbraco.Core.ObjectResolution;
+
+namespace Umbraco.Tests.CoreStrings
+{
+	[TestFixture]
+    public class ShortStringHelperResolverTest
+    {
+	    [SetUp]
+	    public void Setup()
+	    {
+            ShortStringHelperResolver.Reset();
+	    }
+
+        [TearDown]
+        public void TearDown()
+        {
+            ShortStringHelperResolver.Reset();
+        }
+
+        [Test]
+        public void FreezesHelperWhenResolutionFreezes()
+        {
+            var helper = new MockShortStringHelper();
+            ShortStringHelperResolver.Current = new ShortStringHelperResolver(helper);
+            Assert.IsFalse(helper.IsFrozen);
+            Resolution.Freeze();
+            Assert.AreSame(helper, ShortStringHelperResolver.Current.Helper);
+            Assert.IsTrue(helper.IsFrozen);
+        }
+    }
+}