Functional, Performance, and Regression Web Testing

Meet the future of QA automation. These days, web development increasingly means a lot of testing in various browsers, making changes and adjustments, refreshing, and retesting, over and over and over again. Sound familiar? And time-intensive? And boring? => Let Kantu join your testing team.

The way you use Kantu is to define small UI elements (i.e. a button on page, a link, some text) and save cropped screenshots of them as reference images. Then, Kantu compares them against what is shown in the web browser at runtime. Therefore, you build a repository of graphic UI elements vs the complex web UI locators/element IDs/CSS selectors of classic web testing tools. Kantu creates rock-stable test scripts.

Using Kantu saves time and money: Users even tell us that a Kantu macro that reproduces a certain bug can be created and run in less time than it takes for a developer to follow a set of written steps to reproduce the same bug.

With Kantu you can quickly and easily automate functional, performance, and regression testing across any website technology including Java, Flash or Silverlight applets and all AJAX elements. Kantu’s visual technology allow you to capture exact web page response times for every step of a process.

Image-driven web testing
Automated Testing in progress...

Regression Testing

Regression testing with Kantu is easy and very flexible. When parsing a web site Kantu tries to find the test image or text anywhere on the website. This is also called keyword assertion or regression testing. If the image keyword does not exist, Kantu retries the image search automatically every second until a timeout value is reached. If the image is still not found, Kantu reports an error. The automatic retry makes web testing websites with AJAX easy and natural. Kantu tests websites just the same way as a human uses them – visually.

Testing AJAX Websites

Ajax-driven or JavaScript-heavy sites often require different strategies than when testing a regular site: elements appear, disappear and change at any time. Because of its built-in image recognition “intelligence” Kantu can automate any AJAX based websites. It can automate absolutely all AJAX elements and even the most complex Javascript features. Tasks that are tricky to code with tools like Selenium IDE and Webdriver, for example selecting a date from a date-picker or waiting for an element to appear, become as easy as taking a screenshot with Kantu. This allows in-browser testing of even the most complicated AJAX elements, including sliders and drag & drop activity.

I'm very impressed - in a few hours I was able to fully replicate a web app test setup that had taken a week or so to build in Visual Studio Gui testing.
Christian Berndt, Deloitte, France - More user quotes

Data-Driven Testing

Kantu has built-in support for table-driven testing with its ability to read all csv formatted files (tables). No additional coding or scripting is required. You can use any numbers of columns, and all kinds of column content is supported (including full Unicode support). The number of table columns is automatically detected.

Data-driven web testing

Record & Replay with the Image recording wizard

In web testing, time is money. You can easily record your test macros with the built-in recording wizard. You can also edit, copy & paste and modify the screenshot macros with the powerful Kantu editor. The visual macro editor makes test case maintenance easy – and even fun.

Test with Google Chrome and other browsers

The current Kantu version uses the most popular web browser for testing: Google Chrome. Kantu uses the original Chromium as its web browser engine and combines it with its image recognition technology and API. This approach is future proof: Kantu’s visual approach means you are not limited to a certain browser. Future Kantu updates (later this year) will add support for cross-browser performance testing with Firefox, Edge, Opera,… essentially any browser available. And all that without changing your test macros. Because, again, Kantu automates the test visually it is ideally suited for cross-browser testing. (If you purchase Kantu PRO now, the price include free upgrades to the cross-browser editions once it is available, you do not have to pay again for this feature).

Multi-Threading – run many tests at once

The Kantu API enables you to run and control up to 100 browser instances at once (only limited by system resources). Technically speaking, Kantu has full “multi-threading” support. And Kantu instances can run headless.

Great application, I'm a freelance web developer and the games I create have to be played 1000's of times before I can submit them officially to test. I spent weeks looking for a suitable test app and have found yours to be fantastic.
Venkata, India - More user quotes

Kantu Web Testing FAQ

Questions related to Kantu's use for quality assurance and test development.

What if the UI object I am clicking on moves 2 pixels over?

Kantu works like a human. It looks for the image everywhere on the screen. As long as the image is anywhere on the page, it will be found. By default (and for performance reasons) Kantu looks on the visible part of the screen only (= what you see in your browser screen). You can add the SearchImageInWholePage parameter to make it search the whole website.

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Will the macro break if there is adaptive layout on the website?

It depends:
(1) If, as in most cases, all the adaptive layout does is to move the buttons/images to a different place, then all works fine. Kantu will find the image anywhere on the screen.
(2) But if a button (or whatever image you look for) drastically changes its size or even disappears, then yes, the macro would be break. Example: If a navigation menu collapses to the ☰ symbol, this will break the script.

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What about smart waiting?

...so if I click the "login" button and then it takes 1 to 5 seconds to get to the next page, does this framework have intelligent waits? or does it rely on something like "Thread.Sleep(5000)"?

Kantu supports smart waiting by design! Essentially it looks for the image non-stop and does not continue until the image is found. Pretty much like a human user. By default it waits up to 10 seconds. You can adjust this timeout to any value, either globally for all macro or for a specific command. For example, you will need to extend this value when waiting for the result of a flight search on Expedia or for a longer file upload to complete. In all cases this is smart waiting, and not a hard-coded delay.

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Can I use best practices like the "Page object model"?

... so that if I develop thousands of tests and then someone changes how the "login" screen works, I can simply update 1 object instead of updating 1000s of macros? For this we have the API: You can split your image macros in sub-tasks like "Login" or maybe "Upload Image" and then mix & match those macro with the Playcommand:

  • Kantu.Play ("Login.kmacro")
  • Kantu.Play ("Upload image.kmacro")
  • Kantu.Play ("Logout.kmacro")
The API also allows you to read data from text, CSV files and databases for data-driven testing.

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How does the screenshot-driven Kantu Browser Automation tool compare to Selenium IDE?

Are you already using Selenium IDE? Selenium, Sikuli and WebDriver are great (that is why we created the open-source Selenium IDE for Chrome), but consider adding Kantu to the mix and reduce test development and maintenance time greatly. Kantu combines a powerful Scripting API and great usability with the no-compromise computer-vision approach of Sikuli into one powerful visual testing software for web testers and web developers. Note that unlike Sikuli, you can run many instances of Kantu at once and in the background. Kantu does not take over your desktop and Kantu can run in headless mode. Its API makes it ideal for data-driven automated regression and performance testing as part of continuous integration (CI) projects.

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We selected your automation testing framework for its focus on simplicity and easy maintenance. Your software is perfect for what we need.
Darren Myatt, Sony Europe, UK - More user quotes

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