Imports many of the useful extension methods from v5 that are also used in umbraMVCo to begin the

MVC integration.
Imported the unit tests associated with each of these imported classes.

src/Umbraco.Tests/StringExtensionsTests.cs

@@ -0,0 +1,133 @@
+using System.Collections.Generic;
+using System.Text;
+using NUnit.Framework;
+using Umbraco.Core;
+
+namespace Umbraco.Tests
+{
+    [TestFixture]
+    public class StringExtensionsTests
+    {
+        [TestCase("Hello this is my string", " string", "Hello this is my")]
+        [TestCase("Hello this is my string strung", " string", "Hello this is my string strung")]
+        [TestCase("Hello this is my string string", " string", "Hello this is my")]
+        [TestCase("Hello this is my string string", "g", "Hello this is my string strin")]
+        [TestCase("Hello this is my string string", "ello this is my string string", "H")]
+        [TestCase("Hello this is my string string", "Hello this is my string string", "")]
+        public void TrimEnd(string input, string forTrimming, string shouldBe)
+        {
+            var trimmed = input.TrimEnd(forTrimming);
+            Assert.AreEqual(shouldBe, trimmed);
+        }
+
+        [TestCase("Hello this is my string", "hello", " this is my string")]
+        [TestCase("Hello this is my string", "Hello this", " is my string")]
+        [TestCase("Hello this is my string", "Hello this is my ", "string")]
+        [TestCase("Hello this is my string", "Hello this is my string", "")]
+        public void TrimStart(string input, string forTrimming, string shouldBe)
+        {
+            var trimmed = input.TrimStart(forTrimming);
+            Assert.AreEqual(shouldBe, trimmed);
+        }
+
+
+        [TestCase]
+        public void StringExtensions_To_Url_Alias()
+        {
+            var replacements = new Dictionary<string, string>
+            {
+                {" ", "-"},
+                {"\"", ""},
+                {"&quot;", ""},
+                {"@", ""},
+                {"%", ""},
+                {".", ""},
+                {";", ""},
+                {"/", ""},
+                {":", ""},
+                {"#", ""},
+                {"+", ""},
+                {"*", ""},
+                {"&amp;", ""},
+                {"?", ""}
+            };
+
+            var name1 = "Home Page";
+            var name2 = "Shannon's Home Page!";
+            var name3 = "#Someones's Twitter $h1z%n";
+            var name4 = "Räksmörgås";
+            var name5 = "'em guys-over there, are#goin' a \"little\"bit crazy eh!! :)";
+            var name6 = "汉#字*/漢?字";
+
+            var url1 = name1.ToUrlAlias(replacements, true, true, false);
+            var url2 = name2.ToUrlAlias(replacements, true, true, false);
+            var url3 = name3.ToUrlAlias(replacements, true, true, false);
+            var url4 = name4.ToUrlAlias(replacements, true, true, false);
+            var url5 = name5.ToUrlAlias(replacements, true, true, false);
+            var url6 = name6.ToUrlAlias(replacements, true, true, false);
+            var url7 = name6.ToUrlAlias(replacements, true, false, false);
+            var url8 = name6.ToUrlAlias(replacements, true, false, true);
+
+            Assert.AreEqual("home-page", url1);
+            Assert.AreEqual("shannons-home-page", url2);
+            Assert.AreEqual("someoness-twitter-h1zn", url3);
+            Assert.AreEqual("rksmrgs", url4);
+            Assert.AreEqual("em-guys-over-there-aregoin-a-littlebit-crazy-eh", url5);
+            Assert.AreEqual("", url6);
+            Assert.AreEqual("汉字漢字", url7);
+            Assert.AreEqual("%e6%b1%89%e5%ad%97%e6%bc%a2%e5%ad%97", url8);
+
+        }
+
+        [TestCase]
+        public void StringExtensions_To_Camel_Case()
+        {
+            //Arrange
+
+            var name1 = "Tab 1";
+            var name2 = "Home - Page";
+            var name3 = "Shannon's document type";
+
+            //Act
+
+            var camelCase1 = name1.ConvertCase(StringAliasCaseType.CamelCase);
+            var camelCase2 = name2.ConvertCase(StringAliasCaseType.CamelCase);
+            var camelCase3 = name3.ConvertCase(StringAliasCaseType.CamelCase);
+
+            //Assert
+
+            Assert.AreEqual("tab1", camelCase1);
+            Assert.AreEqual("homePage", camelCase2);
+            Assert.AreEqual("shannon'sDocumentType", camelCase3);
+        }
+
+        [TestCase]
+        public void StringExtensions_To_Entity_Alias()
+        {
+            //Arrange
+
+            var name1 = "Tab 1";
+            var name2 = "Home - Page";
+            var name3 = "Shannon's Document Type";
+            var name4 = "!BADDLY nam-ed Document Type";
+            var name5 = "i %Want!thisTo end up In Proper@case";
+
+            //Act
+
+            var alias1 = name1.ToUmbracoAlias();
+            var alias2 = name2.ToUmbracoAlias();
+            var alias3 = name3.ToUmbracoAlias();
+            var alias4 = name4.ToUmbracoAlias();
+            var alias5 = name5.ToUmbracoAlias(StringAliasCaseType.PascalCase);
+
+            //Assert
+
+            Assert.AreEqual("tab1", alias1);
+            Assert.AreEqual("homePage", alias2);
+            Assert.AreEqual("shannonsDocumentType", alias3);
+            Assert.AreEqual("baddlyNamEdDocumentType", alias4);
+            Assert.AreEqual("IWantThisToEndUpInProperCase", alias5);
+        }
+
+    }
+}