How Selenium WebDriver Interacts with Browser?

Selenium WebDriver:

Selenium WebDriver is a browser automation structure that accepts commands and sends them to a browser. It is implemented through a specific browser driver. Control the browser by communicating directly with it. Selenium WebDriver is a collection of open source APIs that are used to automate the testing of a web application. This tool is used to automate the web application test to verify that it works as expected. It supports many browsers, such as Safari, Firefox, IE and Chrome.

WebDriver is a tool to automate the testing of web applications and, in particular, to verify that they work as expected. The goal is to provide a friendly API that is easy to explore and understand, easier to use than the Selenium-RC (1.0) API, which will help make your tests easier to read and maintain.

How to install the Selenium WebDriver:

Grid Selenium:

Selenium Grid is a tool used in conjunction with the Selenium RC to run tests on different machines in different browsers in parallel. That is, running several tests at the same time on different machines running different browsers and operating systems. Selenium WebDriver is a well-designed object-oriented API that supports many languages such as Java, C #, Python, etc. We will see what is API and then we will get to know the complete image of Selenium WebDriver Architecture.

Selenium requires a web controller to interact with the chosen browser. Web controllers are a package to interact with the web browser. It interacts with the web browser or with a remote web server through a communication protocol common to all. You can check and install the Web drivers of your choice of browser.

API:

Application Programming Interface (API) works as an interface between several software components. Selenium ranges from working in the Selenium IDE to creating a data-based structure in the Selenium, but let's turn our attention to how the Selenium really works.

Since we have seen all the magic selenium has done for us just by writing very simple codes. Selenium IDE (Integrated Development Environment) is a Firefox plugin. It is the simplest structure of the Selenium. It allows us to record and reproduce the scripts.

Creating an instance of the WebDriver interface:

The WebDriver interface is the starting point for all uses of the Selenium WebDriver API. Instantiating the WebDriver interface is the first step in writing your Selenium test. You create an instance of the WebDriver interface using a constructor for a specific web browser. The names of these constructors vary according to the web browsers and the invocations of the constructors vary according to the programming languages.

After creating an instance of the WebDriver interface, use this instance to invoke methods and access other interfaces used in the basic steps. You do this by assigning the instance to a variable when creating it and using that variable to invoke methods.

Browser Automation Using Selenium:

Selenium is a powerful tool to control the web browser through the program. It is functional for all browsers, works on all major operating systems and its scripts are written in several languages, such as Python, Java, C # etc, and work with Python.

 Mastering Selenium will help you automate your day-to-day tasks , how to control your tweets, WhatsApp text messages and even googling without actually opening a browser in only 15-30 lines of python code. The limits of automation are infinite with selenium. Selenium can support different types of browsers for automation.

Selenium can be integrated into the TestNG to test several browsers. From the intesting.xml parameters we can pass the name of the browser, and in a test case, we can create a reference to the WebDriver according. Each browser driver uses an HTTP server to receive HTTP requests. When the URL reaches the browser's driver, the browser's driver will pass this request to the real browser via HTTP. Then the commands in your selenium script will be executed in the browser.

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