add test helper to minify json

Author: Chris Santero

JSONAPI.Tests/Json/JsonHelpers.cs

@@ -0,0 +1,13 @@
+using System.Text.RegularExpressions;
+
+namespace JSONAPI.Tests.Json
+{
+    static class JsonHelpers
+    {
+        // http://stackoverflow.com/questions/8913138/minify-indented-json-string-in-net
+        public static string MinifyJson(string input)
+        {
+            return Regex.Replace(input, "(\"(?:[^\"\\\\]|\\\\.)*\")|\\s+", "$1");
+        }
+    }
+}