JavaScript API is used for writing test scripts when using PhantomJS for testing. PhantomJS is a flexible headless Webkit that has support for many standards for the web. It can be used for basic tests with testing tools such as Selenium for Headless testing and automation. It is lightweight and less resource-intensive, which can be used for navigation, collecting information on pages, generating PDFs, and taking screenshots.įirefox also offers headless browser mode with version 56 or later. Examples of headless browser include the following:Ĭhrome Browser can be launched in headless mode with version 59 or later. It allows you to quickly run your load tests in a browser environment with fewer resources as compared to real browser-based load testing. Headless browser load testing skips the rendering or drawing operations as nobody is watching the simulated browsers. This means load tests are run by creating invisible browser instances without any Graphical User Interface (GUI). Headless browser load testing involves running load tests in a browser environment without creating a ‘Head’ or user interface. However, it is often counter by the simplicity of running browser-based tests and an excellent cloud-based load testing tool. This can take longer than other load tests approached. However, this should not be a problem if you use a cloud-based load test platform.īrowser-based load testing involves rendering the complete website UI in a browser instance rather than simple API request-response recording. For example, in our login example, if we change the authentication protocol, the login load test doesn’t need to be changed as it is not affected by that.ĭisadvantages of Real Browser-based Load Testingīrowser-based load testing using a regular chrome browser, for example, require higher CPU and Memory to create instances for expected load. Simple scripts and less complicated tests means easier maintenance and more agility for load testing. Unlike other traditional load testing methods where you need parameters and values to pass, browser-based load tests are easy to create and initiate with streamlined scripts.īrowser-based load testing allows you to collect the most accurate real-world data, such as network and request delays, as your users also interact with your website using a regular browser. For example, if you want to create a login action, you just need the username and password to fill in, and which button to click to proceed, you don’t need to know the technicalities of authentication protocols and such. Browser-based load testing allows you to load test your website with regular Chrome browser and understand the real-world user behavior.įor creating browser-based load testing scripts, you don’t need to have in-depth knowledge of underlying protocols. Real-world end-users interact with the website using browsers, for example, in a real Chrome browser. This allows testers to simulate the most identical user journey as in the real world scenario.Īdvantages of Real Browser-based Load Testing For example, which button to click, where to navigate, what information to feed in input boxes, how to interact with an element, when to interact with an element, and so on. Browser-based load testing scripts have instructions related to actual navigation and interaction on the website. The virtual users in browser-based load testing are called Browser Level Users (BLU). This creates an almost identical environment as real users in the real world.
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