Migrated member unit tests to new unit test project using builder pattern.

src/Umbraco.Tests.Common/Builders/Extensions/StringExtensions.cs

@@ -0,0 +1,20 @@
+namespace Umbraco.Tests.Common.Builders.Extensions
+{
+    public static class StringExtensions
+    {
+        public static string ToCamelCase(this string s)
+        {
+            if (string.IsNullOrWhiteSpace(s))
+            {
+                return string.Empty;
+            }
+
+            if (s.Length == 1)
+            {
+                return s.ToLowerInvariant();
+            }
+
+            return char.ToLowerInvariant(s[0]) + s.Substring(1);
+        }
+    }
+}