feat(tests): add helper extension to normalize strings

Author: jaredcnance

test/JsonApiDotNetCoreExampleTests/Helpers/Extensions/StringExtensions.cs

@@ -0,0 +1,15 @@
+using System.Text.RegularExpressions;
+
+namespace JsonApiDotNetCoreExampleTests.Helpers.Extensions
+{
+
+    public static class StringExtensions
+    {
+        public static string Normalize(this string input)
+        {
+            return Regex.Replace(input, @"\s+", string.Empty)
+                .ToUpper()
+                .Replace('"', '\'');
+        }
+    }
+}