PERFORMANCE TEST - WebPerf Test

No web browser

Organize your test early on -

• could be base on user stories
• Small granularity so you know what is slow
• 

Adding Validatation Rule

All have LEVEL to indicate importance of execution

Very important : Performance Goals

Set this in individual step 

OR press the button to batch edit the response time

 Response time = Request time + Response

 

Parameterize the input and configuratoin

 

Extraction Rule for calcultion verification

 

Custom extraction rule

Custom Extraction Rule, the code is to extract the last hyperllnk attribute's value rended at the page.

seed it to a context parameter. which is not straightforward to extract via the tag.

using Microsoft.VisualStudio.TestTools.WebTesting;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace NewProductIdExtractor
{
    [DisplayName("Last Product Id")]
    [Description("Grab the last inserted product id")]
    public class NewProductId : ExtractionRule
    {
        public override void Extract(object sender, ExtractionEventArgs e)
        {
            HtmlTagInnerTextParser parser = new  HtmlTagInnerTextParser(e.Response.BodyString);
            //HtmlTagInnerText text = new HtmlTagInnerText()
            //    HtmlAttribute attri = new HtmlAttribute();
            //var match = parser.GetInnerTextForHtmlTags("data-value", true, true, true).Last();
            //int i = match.DocumentContent.LastIndexOf(""");
            string formFieldValue = string.Empty;
            foreach (HtmlTag tag in e.Response.HtmlDocument.GetFilteredHtmlTags(new string[] { "a" }))
            {
                foreach (HtmlAttribute attr in tag.Attributes)
                {
                    if (attr.Name == "data-value")
                        formFieldValue = attr.Value;
                }
            }
            e.WebTest.Context.Add(ContextParameterName, formFieldValue);
            e.Success = true;
        }
    }
}

Use {{}} to insert it to subsequent request to the server.

 

Data Driven -> Add Data Souce for multiple runs. bind the request form parameters to database row records

 Conditional added to the test step

 Challenges

Set the baseline  response time validation rule for login page for 3 seconds, observe the resutl

For particular page log in page, the average response time WAS

 

 Challenge : Caching the home page can speed up the load time, but what about the top right section where content depend on whether user log in or not

Solution :  Use Donut Caching

 

Load balance using Nginx refer to this link

Machine key need to be generated by IIS / added apply to web.config *at all web application*

To avoid offending cookie authentication not match issue (cookie issued by same application host at different server could not validate each other) 

  Here is the youtube video to teach how to achieve it https://www.youtube.com/watch?v=bU7bA5myapY

 

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