Selenium is an open-source testing suite. It is a collection of tools and libraries for browser automation. It allows users to test their websites in different browsers functionally. Perform cross-browser testing to verify that the website works consistently across different browsers. In this article, we discuss What is Selenium and its components. Join the Selenium Training In Pune and learn more about Selenium IDE, Selenium RC, Selenium Web Driver, and Selenium Grid.
Selenium IDE (Integrated Development Environment)
The Selenium Integrated Development Environment is the core tool of the Selenium Suite. This is a complete IDE for Selenium testing. It is implemented as an add-on for Firefox and an extension for Chrome. Allows you to record, edit and debug functional tests. Previously, it was known as Selenium Recorder.
Scripts can be auto-saved and manually edited, providing support for auto-completion and the ability to submit commands quickly. The scripts are written in Selenese, a test scripting language unique to Selenium. Selenese provides commands to perform actions in the browser (click a link, select an option) and retrieve data from the resulting pages.
Selenium RC (Remote control)
Selenium Remote Control is a Java server that accepts browser commands over HTTP. RC allows you to write automated tests for web applications in any programming language, enabling better integration of Selenium into existing unit testing frameworks. The Selenium project now provides customer drivers for Python, Ruby, PHP, NET, Perl and Java to make writing tests easier. The Java driver can be used with JavaScript. A Selenium RC server instance is required to run the HTML test case, meaning the port must differ for each parallel execution. However, for Java/PHP testing, only one Selenium RC instance should run continuously. To learn more about how selenium supports multiple operating systems, join Selenium Training In Mumbai.
Selenium Web Driver
The Selenium Web Driver is a Selenium Remote Control(RC) successor. Selenium Web Driver accepts commands and sends them to the browser. It is implemented through a browser-specific browser driver, which transmits commands to the browser and recovers the results. Most browser drivers launch and access the application.
Selenium WebDriver does not require a specific server to perform tests. Instead, WebDriver directly initiates and controls the browser instance. However, you can use Selenium Grid with WebDriver to perform tests on remote systems. Where possible, WebDriver uses native operating system-level functionality rather than browser-based JavaScript commands to drive the browser. This avoids issues with subtle differences between native and JavaScript commands, including security restrictions.
Selenium GRID
Selenium Grid is an intelligent proxy server that makes running tests in parallel on multiple machines easy. It also allows tests to consume web browser instances running on remote machines. With Selenium Grid, a server acts as a hub. Tests contact the hub to gain access to browser events. The core contains a list of servers that provide access to browser events (WebDriver nodes) and allow tests to consume these events. Selenium Grid allows tests to run in parallel on multiple machines and manages different browser versions and configurations centrally (instead of per test).
Its ability to run tests on remote browser instances helps spread the test load across multiple machines and run tests on browsers on different platforms or operating systems. The latter is helpful in cases where all browsers used for testing cannot run on the same site. Join Selenium Training in Kolkata at FITA Academy to gain hands-on expertise, industry-recognized certifications, and the skills to excel in Selenium.
