Welcome!

Java IoT Authors: Jason Bloomberg, Scott Allen, SmartBear Blog, Elizabeth White, Waqar Ahmad

Related Topics: IoT User Interface, Java IoT

IoT User Interface: Article

Selenium Tests for Automated JavaScript/AJAX Performance Analysis

A step-by-step guide

With more than 3 million downloads, Selenium is a functional testing framework. It allows web developers and QA professionals to automatically test how an application functions on multiple browsers, such as Firefox, Internet Explorer and Chrome and across operating systems, such as different versions of Windows and Mac OS.

The FREE dynaTrace AJAX Edition on the other side is probably the best web site performance analysis tool for Internet Explorer 6, 7 and 8.  Here is what John Resig, Creator of jQuery has to say about it: “I’m very impressed with dynaTrace AJAX Edition’s ability to get at the underlying “magic” that happens inside a browser: page rendering, DOM method execution, browser events, and page layout calculation. Much of this information is completely hidden from developers and I’ve never seen it so easily collected into a single tool. Huge kudos to dynaTrace for revealing this information and especially so for making it happen in Internet Explorer

Combine best of breed tools for Automated Performance Analysis
If we look at these two tools it almost seems logical to use them in combination in order to automatically capture performance data from within the browser for every Selenium Test you execute.

Why would you want to do that?

In case your Selenium Tests identify a problem – whether it is a functional issue (page not working correctly) or a performance problem (page are much slower in the latest build) – the data that is automatically captured by dynaTrace AJAX contains all information necessary for your web engineers to figure out the root cause of the problem. Without this information, your engineers probably go ahead and manually reproduce the error by executing and debugging through the test case manually. Manual work means additional time and effort – and that’s what can be avoided. Best of all – BOTH TOOLS ARE FREE!!

How it works – Example on testing Google Search
Selenium has multiple options to execute tests. Either use your HTML Test Suites that define the individual test cases in HTML Tables or use a programming language such as Java and “code” your tests. Let’s have a look at these two scenarios and how you can get Selenium to work with the dynaTrace AJAX Edition.

The integration basics are explained in Automation with dynaTrace AJAX Edition and  in Advanced Timing and Argument Capturing. The dynaTrace AJAX Agent that runs as an Internet Explorer Add-On gets activated and is configurable via several environment variables. DT_IE_AGENT_ACTIVE=true activates the Add-On so that it collects data from the current browser session. DT_IE_SESSION_NAME can be used to specify the recorded session name, e.g.: MySeleniumTest123. DT_IE_SERVER_HOST and DT_IE_SERVER_PORT can be used to connect to a dynaTrace AJAX Edition client that runs on a different machine – this is useful when you want to centralize data capturing. DT_IE_CLEAR_CACHE=true causes the Add-On to clear the browser cache before any actions are executed – this is very useful when you want to test your web sites cache behaviour.

These environment variables need to be set for the browser instance that runs the tested website. The browser is launched by the selenium server process. Therefore we have to set these environment variables for that server process as they are propagated to all processes that get launched from it.

Requirement: The dynaTrace AJAX Edition must be running on the local machine in order for the launched browser instances to connect to it. You can also run the AJAX Edition on a different machine – in this case you need to specify DT_IE_SERVER_NAME with the name of the machine where the AJAX Edition runs on.

Running an HTML Test Suite
The following batch file sets the necessary environment variables to a) activate the dynaTrace AJAX Add-On in IE and b) specifiy a custom session name:

@echo off
set SELENIUM_RC=C:\selenium\selenium-server.jar
set SCRIPT_PATH=%~dp0

rem dynaTrace AJAX IE agent settings
set DT_IE_AGENT_ACTIVE=true
set DT_IE_SESSION_NAME=Google_SeleniumTest

java -jar %SELENIUM_RC% -log exec.log -htmlSuite "*iexplore" "http://www.google.com"
"%SCRIPT_PATH%\GoogleSuite.html" "%SCRIPT_PATH%\GoogleResults.html"

Before I run this script I make sure to launch the dynaTrace AJAX Edition. When I execute the script Selenium will launch the HtmlRunner in a separate browser instance and will then launch the browser that will execute your test steps. The second browser instance will have the active dynaTrace AJAX agent. You can tell this by the changed IE icon as well as an increasing number in the Captured Events displayed in the dynaTrace AJAX Edition IE Toolbar:

Executing an HTML Test Suite with dynaTrace AJAX capturing  performance data

Executing an HTML Test Suite with dynaTrace AJAX capturing performance data

Note: Even though both browser instances use the DT_IE_XXX environment variables, the AJAX Edition will not collect information from the Selenium Test Runner. The Test Runner runs as an HTA Application which prevents the AJAX Edition Add-On from being loaded. In this case it is an advantage as we are not interested in the performance of the Selenium Runner.

Once the test is done and the browser is closed we can explore the results captured in the dynaTrace AJAX Edition:

dynaTrace AJAX Edition captured performance data from the Selenium  Test Run using the configured Session Name

dynaTrace AJAX Edition captured performance data from the Selenium Test Run using the configured Session Name

The session name is the one we passed in via DT_IE_SESSION_NAME – Google_SeleniumTest in this case. You will see a URL to a local file. That is a file that Selenium opens which then actually opens the URL of the test application. Simply ignore this line and focus on those URLs of your test scenario.

Running Test Case from Java (or JUnit)
Many folks out there use the option to write their Selenium tests in Java – either using JUnit as executing framework or just using the DefaultSelenium proxy in a console app or custom test framework. The approach here is the same as explained in the Html Test Case Use Case. We have to start the selenium server with the DT_IE_XXX environment variables. Here is the batch file I use:

@echo off
set SELENIUM_RC=C:\selenium\selenium-server.jar
set SCRIPT_PATH=%~dp0

rem IE agent settings
set DT_IE_AGENT_ACTIVE=true
set DT_IE_SESSION_NAME=dynaTrace_Selenium

java -jar %SELENIUM_RC%

Here is my Java application that executes the same Google Search test steps as my HTML Test Suite:

public static void main(String args[]) {
Selenium selenium
= new DefaultSelenium("localhost", 4444, "*iexplore", "http://www.google.com");

selenium.
start();
selenium.
open("http://www.google.com");
selenium.
type("q", "dynatrace");
selenium.
click("btnG");

selenium.
stop();
}

The result is the same. The Selenium server launches two browser instances. The first loads the Selenium Runner which won’t be analyzed by dynaTrace AJAX as it is an HTA Application. The second launches google.com and searches for dynaTrace. The following screenshot shows this captured session with the name dynaTrace_Selenium:

dynaTrace AJAX Edition captured the data from the test steps  executed by my Java application

dynaTrace AJAX Edition captured the data from the test steps executed by my Java application

Where to go from here?
The feedback I get from our user community is that this type of integration is a huge time saver. Whenever their Selenium tests fail, the in-depth performance data from the test run is available for analysis. A key point to remember is that this is not just about performance. As the AJAX Edition captures full JavaScript traces, DOM Access, Network and Rendering activities, it makes it very easy to identify all functional and deployment-related problems. Analyzing the dynaTrace AJAX data allows one to identify whether the problem is caused by files that didn’t get deployed on the web server, whether a new JavaScript library was introduced that wasn’t fully tested yet, or whether the problem actually originates on the server-side code. Check out the following additional resources to learn more about how to analyze the data that is captured: Getting Started with dynaTrace AJAX Edition (includes links to real-life web site analysis examples), Why Web 2.0 requires full End-to-End visibility and Learn how Monster.com uses the AJAX Edition for their web-site

In case you have questions on this topic, either comment on the blog or use the comment feature on our dynaTrace AJAX Community Portal.

Related reading:

  1. 5 Steps to Automate Browser Performance Analysis with Watir and dynaTrace AJAX Edition I’ve recently been working with several clients to analyze their...
  2. Ensuring Web Site Performance – Why, What and How to Measure Automated and Accurately It is a fact that end user response time is...
  3. Selenium/BrowserMob integration with dynaTrace Selenium is a free Web Application Testing System. It gained...
  4. Automated Performance Analysis: What’s going on in my ASP.NET or ASP.NET MVC Application? I’ve spent some time in the last weeks playing with different...
  5. Week 6 – How to Make Developers Write Performance Tests I had an interesting conversation with our Test Automation team...

More Stories By Andreas Grabner

Andreas Grabner has been helping companies improve their application performance for 15+ years. He is a regular contributor within Web Performance and DevOps communities and a prolific speaker at user groups and conferences around the world. Reach him at @grabnerandi

@ThingsExpo Stories
You think you know what’s in your data. But do you? Most organizations are now aware of the business intelligence represented by their data. Data science stands to take this to a level you never thought of – literally. The techniques of data science, when used with the capabilities of Big Data technologies, can make connections you had not yet imagined, helping you discover new insights and ask new questions of your data. In his session at @ThingsExpo, Sarbjit Sarkaria, data science team lead ...
The IoT has the potential to create a renaissance of manufacturing in the US and elsewhere. In his session at 18th Cloud Expo, Florent Solt, CTO and chief architect of Netvibes, will discuss how the expected exponential increase in the amount of data that will be processed, transported, stored, and accessed means there will be a huge demand for smart technologies to deliver it. Florent Solt is the CTO and chief architect of Netvibes. Prior to joining Netvibes in 2007, he co-founded Rift Technol...
Join IBM June 8 at 18th Cloud Expo at the Javits Center in New York City, NY, and learn how to innovate like a startup and scale for the enterprise. You need to deliver quality applications faster and cheaper, attract and retain customers with an engaging experience across devices, and seamlessly integrate your enterprise systems. And you can't take 12 months to do it.
Machine Learning helps make complex systems more efficient. By applying advanced Machine Learning techniques such as Cognitive Fingerprinting, wind project operators can utilize these tools to learn from collected data, detect regular patterns, and optimize their own operations. In his session at 18th Cloud Expo, Stuart Gillen, Director of Business Development at SparkCognition, will discuss how research has demonstrated the value of Machine Learning in delivering next generation analytics to im...
This is not a small hotel event. It is also not a big vendor party where politicians and entertainers are more important than real content. This is Cloud Expo, the world's longest-running conference and exhibition focused on Cloud Computing and all that it entails. If you want serious presentations and valuable insight about Cloud Computing for three straight days, then register now for Cloud Expo.
So, you bought into the current machine learning craze and went on to collect millions/billions of records from this promising new data source. Now, what do you do with them? Too often, the abundance of data quickly turns into an abundance of problems. How do you extract that "magic essence" from your data without falling into the common pitfalls? In her session at @ThingsExpo, Natalia Ponomareva, Software Engineer at Google, will provide tips on how to be successful in large scale machine lear...
IoT device adoption is growing at staggering rates, and with it comes opportunity for developers to meet consumer demand for an ever more connected world. Wireless communication is the key part of the encompassing components of any IoT device. Wireless connectivity enhances the device utility at the expense of ease of use and deployment challenges. Since connectivity is fundamental for IoT device development, engineers must understand how to overcome the hurdles inherent in incorporating multipl...
The IETF draft standard for M2M certificates is a security solution specifically designed for the demanding needs of IoT/M2M applications. In his session at @ThingsExpo, Brian Romansky, VP of Strategic Technology at TrustPoint Innovation, will explain how M2M certificates can efficiently enable confidentiality, integrity, and authenticity on highly constrained devices.
The paradigm has shifted. A Gartner survey shows that 43% of organizations are using or plan to implement the Internet of Things in 2016. However, not just a handful of companies are still using the old-style ad-hoc trial-and-error ways, unaware of the critical barriers, paint points, traps, and hidden roadblocks. How can you become a winner? In his session at @ThingsExpo, Tony Shan will present a methodical approach to guide the holistic adoption and enablement of IoT implementations. This ov...
We’ve worked with dozens of early adopters across numerous industries and will debunk common misperceptions, which starts with understanding that many of the connected products we’ll use over the next 5 years are already products, they’re just not yet connected. With an IoT product, time-in-market provides much more essential feedback than ever before. Innovation comes from what you do with the data that the connected product provides in order to enhance the customer experience and optimize busi...
Artificial Intelligence has the potential to massively disrupt IoT. In his session at 18th Cloud Expo, AJ Abdallat, CEO of Beyond AI, will discuss what the five main drivers are in Artificial Intelligence that could shape the future of the Internet of Things. AJ Abdallat is CEO of Beyond AI. He has over 20 years of management experience in the fields of artificial intelligence, sensors, instruments, devices and software for telecommunications, life sciences, environmental monitoring, process...
SYS-CON Events announced today that Ericsson has been named “Gold Sponsor” of SYS-CON's @ThingsExpo, which will take place on June 7-9, 2016, at the Javits Center in New York, New York. Ericsson is a world leader in the rapidly changing environment of communications technology – providing equipment, software and services to enable transformation through mobility. Some 40 percent of global mobile traffic runs through networks we have supplied. More than 1 billion subscribers around the world re...
SYS-CON Events announced today that Stratoscale, the software company developing the next generation data center operating system, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Stratoscale is revolutionizing the data center with a zero-to-cloud-in-minutes solution. With Stratoscale’s hardware-agnostic, Software Defined Data Center (SDDC) solution to store everything, run anything and scale everywhere...
Angular 2 is a complete re-write of the popular framework AngularJS. Programming in Angular 2 is greatly simplified – now it's a component-based well-performing framework. This immersive one-day workshop at 18th Cloud Expo, led by Yakov Fain, a Java Champion and a co-founder of the IT consultancy Farata Systems and the product company SuranceBay, will provide you with everything you wanted to know about Angular 2.
SYS-CON Events announced today that Men & Mice, the leading global provider of DNS, DHCP and IP address management overlay solutions, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. The Men & Mice Suite overlay solution is already known for its powerful application in heterogeneous operating environments, enabling enterprises to scale without fuss. Building on a solid range of diverse platform support,...
In his session at @ThingsExpo, Chris Klein, CEO and Co-founder of Rachio, will discuss next generation communities that are using IoT to create more sustainable, intelligent communities. One example is Sterling Ranch, a 10,000 home development that – with the help of Siemens – will integrate IoT technology into the community to provide residents with energy and water savings as well as intelligent security. Everything from stop lights to sprinkler systems to building infrastructures will run ef...
You deployed your app with the Bluemix PaaS and it's gaining some serious traction, so it's time to make some tweaks. Did you design your application in a way that it can scale in the cloud? Were you even thinking about the cloud when you built the app? If not, chances are your app is going to break. Check out this webcast to learn various techniques for designing applications that will scale successfully in Bluemix, for the confidence you need to take your apps to the next level and beyond.
Manufacturers are embracing the Industrial Internet the same way consumers are leveraging Fitbits – to improve overall health and wellness. Both can provide consistent measurement, visibility, and suggest performance improvements customized to help reach goals. Fitbit users can view real-time data and make adjustments to increase their activity. In his session at @ThingsExpo, Mark Bernardo Professional Services Leader, Americas, at GE Digital, will discuss how leveraging the Industrial Interne...
Whether your IoT service is connecting cars, homes, appliances, wearable, cameras or other devices, one question hangs in the balance – how do you actually make money from this service? The ability to turn your IoT service into profit requires the ability to create a monetization strategy that is flexible, scalable and working for you in real-time. It must be a transparent, smoothly implemented strategy that all stakeholders – from customers to the board – will be able to understand and comprehe...
Increasing IoT connectivity is forcing enterprises to find elegant solutions to organize and visualize all incoming data from these connected devices with re-configurable dashboard widgets to effectively allow rapid decision-making for everything from immediate actions in tactical situations to strategic analysis and reporting. In his session at 18th Cloud Expo, Shikhir Singh, Senior Developer Relations Manager at Sencha, will discuss how to create HTML5 dashboards that interact with IoT devic...