Explain about the Selenium Webdriver

Article about Explain about the Selenium Webdriver

Jan 29, 2021

When it comes to Web UI automation, Selenium WebDriver is among the most common tools. With a large variety of programming languages, such as Python, Java, C#, and more. Then you can use the Selenium framework. As per the Stack Overflow Developer Survey, with 66.7 percent, Python is the best language. It is also the programming language that is most sought after. So, if you intend to run Selenium and Python test automation, you're in the right spot!

What is Selenium WebDriver? [Complete Guide]


Let us cover a variety of subjects in this comprehensive Selenium Python. This is such as the fundamentals of Selenium WebDriver. You can learn Selenium WebDriver with Python, Selenium WebDriver vs. Selenium RC.

What's the WebDriver for Selenium?

A web page is up of various web components. This is such as text boxes, checkboxes, buttons, etc. Checking for web automation requires automating the tasks. You can perform on certain elements of the web. Selenium WebDriver is a common platform for web-based automation testing. Thus, you can use that to automate Web UI testing tasks.

Selenium WebDriver does not interfere with a page's web components. A Selenium WebDriver unique to the browser serves as the connection. This is between the test script and the web browser. The main component which communicates with the web browser is the Selenium WebDriver.

Selenium WebDriver supports Python, Java, C#, Ruby, and more. These are most of the common programming languages used by developers and testers. Popular operating systems such as Windows, Mac OS, Linux, and Solaris support.

By default, the Selenium WebDriver web browser is Mozilla Firefox.

Selenium WebDriver Architecture

Before looking into Selenium WebDriver with Python, understanding the communication. This is between different blocks of Selenium is important. For interacting between programming languages and web browsers, Selenium WebDriver APIs use.

The following blocks from the Selenium WebDriver architecture.

  • Client Libraries for Selenium
  • Protocol on JSON Wire
  • Drivers for Browsers
  • The Browsers

Let's take a thorough look at each of these elements.

Client Libraries for Selenium

As stated earlier, developers can use Selenium with common programming languages. This is for performing automation testing. Moreover, this multi-language support is possible in Selenium. This is through Selenium Client Libraries or Selenium Language Bindings.

Using Selenium WebDriver with Python is the subject of this Selenium Python. Thus, for Python, we will need language bindings. You can download the programming language drivers. You can include Python, from the official Selenium location for Client Libraries.

Protocol on JSON Wire

JSON stands for Object Notation in JavaScript. To pass data between the server and the client on the network, the JSON Wire Protocol used. It is a REST (Representational State Transfer) API that makes it easier for the HTTP Server. This is to transfer information.

Each web browser has its browser driver, Chrome, Firefox, Internet Explorer, etc.

Drivers for Browsers

The primary responsibility for interacting with the corresponding web browser is browser drivers. Each browser has its browser driver. Then the same must install on the computer that carries out the automation tests.

Since contact with the web browser occurs via the browser driver. You may not expose the internal logic of the browser. The browser driver brings to the interaction with the browser. You may need the degree of abstraction.

When any order (or request) receives the browser driver. It executes on the respective browser and the execution response. This is as an HTTP response to the web driver.

The Browsers

Popular browsers like Chrome, Firefox, Internet Explorer, Microsoft Edge, Selenium can use. For browsers whose browser driver is not usable, the framework we cannot use.

The suite of Methods for Selenium

IDE, RC, and Selenium Grid compose of Selenium version v1. Selenium's latest stable version is 3.141.59, and Selenium 4's Alpha version is 4.0.0-alpha-6. All the Selenium Client Libraries are Selenium 4 compatible.

In Selenium v2, Selenium WebDriver add, and in Selenium 3, Selenium RC deprecates. Selenium RC has a more complex architecture and efficiency is also lacking.

The Selenium Suite is up of the following elements.

· Selenium World of Integrated Growth (IDE)

· Remote Control Selenium (RC)

· WebDriver Selenium

· Grid Selenium

IDE of Selenium

Selenium IDE is a popular playback and record testing program. It was available only as a plugin for Firefox, but Selenium IDE is now also available as an add-on for Chrome.

The new version of the Selenium IDE includes a command-line tool (SIDE Runner). Thus, allows you to run the .side project on the Node.js platform. If you wish to build test scripts using the Selenium IDE, Selenium WebDriver need.

RC of Selenium

Selenium RC considers being the key component of Selenium before. You can implement WebDriver in Selenium v2. Selenium RC was widely praised as it could resolve the policy of the same root. This is which creates major concerns when web automation testing performs. For security purposes, the same-origin policy implements and ensures that material. This was not open to scripts from another domain (or site).

To solve the same-origin policy, the Selenium RC Server, which is an HTTP proxy server. Selenium RC, thus, requires the Selenium Client and the Selenium RC Server.

RC server of Selenium

Selenium RC Server intends to trick the browser in such-a-way. Thus, it assumes that the testing of the web application and Selenium Core belong to the same domain.

The proxy injection model uses to resolve the JavaScript Security restriction. Here, Selenium RC Server sits under scrutiny between the browser & website(or app). Then masks the test applicant (website or app) under a fictional URL.

These modifications not only complicates the architecture. But also contributes to the execution time of the test becoming elongated. Selenium RC is, thus, formally deprecated.

WebDriver Selenium

Selenium WebDriver is an interactive test system that uses for website validation. Popular programming languages such as Python, C#, Java, Ruby, and more support.

In Selenium v2, Selenium WebDriver adds. Since WebDriver in Selenium uses its corresponding browser driver. This is to interact with a web browser, a component such as Selenium RC Server is not necessary (as in Selenium RC).

Selenium WebDriver can download it from the links listed below for popular browsers.

Edge from Microsoft

We'd look at using WebDriver in Selenium with a Python application. This is such as PyTest in more parts of this Selenium WebDriver.

Grid Selenium

Selenium Grid lets you run tests through the various browser, operating system, and computer combinations. A Selenium Grid can be used for parallel test execution, as tests can be performed in parallel against various browser and OS combinations.

The Selenium Grid uses the architecture of the Hub and Node, where the Hub is the master and its slaves are one or more nodes. Selenium Grid 4 supports Standalone Mode, Entirely Distributed Mode, and the conventional Hub & Node Mode, which is still under Alpha.

Lambda Test provides an online Selenium Grid that can be used to test your public or locally hosted websites and web apps on 2000+ real mobile and desktop browsers running on a real operating system through live immersive cross-browser testing.


While Selenium RC (Remote Control) and Selenium WebDriver are tools for test automation that support various programming languages. In many aspects, they differ a lot. The main difference lies in both of these instruments' design. You can learn more about this and move up on gaining knowledge through Selenium online training Hyderabad.

Articles authored by Professional ITGuy

Published: Jan 29, 2021

Published: Jan 29, 2021