How Do You Start Learning Selenium For Beginners?

Introduction:

Selenium is a test automation toolkit that is open-source and free and is used to automate web-based applications. It provides automation across several platforms, programming languages, and browsers. We can combine the functional tests with Maven, Jenkins, and other build automation and continuous integration systems using Selenium to automate the available tests.


Selenium is an open-source (free) automated testing framework that verifies web applications across many platforms and browsers. To construct Selenium Test Scripts, you can use a variety of programming languages, like Java, C#, Python, etc. Selenium testing is the common name for testing conducted using the Selenium testing tool. The top Selenium Training in Chennai can teach professionals this so they have a full knowledge.


Components of Selenium:

The four parts of the Selenium are as follows:


Selenium IDE:

We may automate web applications by using Selenium IDE, a record and playback automation tool. It is accessible as a browser extension for Chrome and Firefox. It is the automation tool of choice for those with little or little programming language experience because it operates on the record and playback principle.


Selenium RC:

Selenium has declared that Selenium Remote Control(RC) is no longer supported. For automation, it used to be necessary to inject javascript code into the browser, which necessitated the usage of a separate server. In addition, it had many flaws, including slowness, the need to start the server before running test scripts, and the lack of a headless browser like Html and UnitDriver.


Selenium WebDriver:

By far the most significant Selenium Suite component. It offers several drivers for many browsers and supports a number of programming languages. It is entirely object-oriented, supports all of the popular browsers, including Chrome, Firefox, Internet Explorer, and Safari, and allows for scripting in the majority of well-known languages, including Java, Python, and Ruby.


One of the most popular tools is Selenium Webdriver solutions to automate online applications. In contrast to Selenium RC, which injects javascript into browsers to automate them, it automates the browsers by calling their native method directly. Webdriver is, therefore, a lot quicker than Selenium RC.


In addition, Selenium WebDriver can quickly deal with situations like alarms, pop-up windows, ajax requests, keyboard inputs, and mouse movements. Because Webdriver calls the methods of various browsers directly, each browser has its driver.


Let's move on to Selenium WebDriver, the last and most popular tool in the Selenium suite.


Select a library that works with your favourite programming language to start using WebDriver. Remember that each library's installation procedure is unique to its language. A browser driver is necessary to automate web testing for a specific browser; you can only launch a browser in Selenium and execute your first script. The following stages are required for this process: JSON Wire Protocol is used to transfer the Selenium test script from the server to the browser client. Check out this tutorial for installation instructions, further details, and reference photographs.


Selenium Grid:

Another crucial component of the Selenium Suite is Selenium Grid. It aids in the distributed parallel execution of Selenium tests over various remote machines. There is a hub and numerous nodes. The Selenium instances that run on the nodes execute the test cases. The central hub, which serves as a server and manages the entire test execution, is connected to these nodes.


Let's look at the procedures needed to start Selenium automation testing.


Installing the extension found on each of the most popular browsers' official websites is all you need to start using Selenium IDE. Pick a URL, record your test case, and publish it in the format of your choice after the installation is finished. The same test case can be rerun using an IDE recording.


Selenium Grid uses two components during the testing process. The first one manages the test devices through a solitary Hub. The Hub must first determine the desired capabilities for the operating system, browser, and version of the browser before the Hub can execute a test script with Grid.


Throughout this procedure, numerous registered nodes manifest. The second element, a Remote Selenium WebDriver instance called a Node, communicates with the browsers. Run the test script for that browser once the Hub identifies a Node that satisfies the desired capabilities.


As we've previously stated, this tool can run parallel testing across various machines. All you need is a Hub and a Node that is connected. Here is a step-by-step tutorial for this procedure.


Advantages of Selenium

  • Because Selenium is a free source, there are no fees associated with using it.

  • Most popular programming languages support scripting, including Java, C#, Ruby, and Python.

  • It offers platform compatibility for Windows, Linux, Mac OS, and Solaris, four of the most popular operating systems.

  • Most widely used browsers are supported, including Chrome, Firefox, Edge, Internet Explorer, Opera, and Safari.

  • Non-programmers can develop automation scripts utilizing the record and playback features offered by the Selenium IDE, a component of the Selenium suite.

  • Selenium Grid supports distributed and concurrent testing.


Limitations of Selenium


  • Selenium does not support the automation of desktop applications.

  • Selenium cannot automate REST or SOAP web services.

  • For the construction of scripts, Selenium WebDriver has specific requirements for programming languages.

  • We must rely on external libraries to carry out routine automated activities like logging and reading-writing to external files.


Conclusion:

Developers may automate the testing of their web applications using the versatile and affordable Selenium tool. The capability of this software to test apps across different web browsers is its most exciting feature. It ensures that specific browsers won't cause websites to crash or malfunction. With the aid of Dot Net Training in Chennai, we can integrate Selenium with additional technologies like Dot Net for improved utilisation.

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