An RFC 6901 JSON Pointer extraction rule for Visual Studio webtest that extracts a value from a JSON response

JsonPointerPropertyExtractionRule.cs

using Microsoft.VisualStudio.TestTools.WebTesting;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System.ComponentModel;

using Tavis;

namespace Extensions.ExtractionRules
{
    /// <summary>
    /// A JSON extraction rule for Visual Studio webtest that extracts a value from a JSON response using RFC 6901 JSON Pointer.
    /// </summary>
    [DisplayName("JSON Pointer Property Extraction Rule")]
    [Description("Extracts the value from an RFC 6901 JSON pointer out of the response")]
    public class JsonPointerPropertyExtractionRule : ExtractionRule
    {
        /// <summary>
        /// The name of the JSON pointer to extract from the JSON result.
        /// </summary>
        [DisplayName("JSON Pointer name")]
        [Description("The RFC 6901 JSON pointer to extract from the JSON result")]
        public string JSonPointerName { get; set; }

        /// <summary>
        /// Extract a JSON value from the response.
        /// </summary>
        public override void Extract(object sender, ExtractionEventArgs e)
        {
            var jsonBody = JsonConvert.DeserializeObject<JToken>(e.Response.BodyString);
            var pointer = new JsonPointer(JSonPointerName);
            var value = pointer.Find(jsonBody).ToString();

            if (!string.IsNullOrWhiteSpace(value))
            {
                e.WebTest.Context.Add(ContextParameterName, value);
                e.Message = $"Property '{JSonPointerName}' has the value '{value}'";
                e.Success = true;
            }
            else
            {
                e.Message = $"Property '{JSonPointerName}' not found in response";
                e.Success = false;
            }
        }
    }
}

packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Newtonsoft.Json" version="5.0.8" targetFramework="net452" />
  <package id="Tavis.JsonPointer" version="0.5.0" targetFramework="net452" />
</packages>