Introduction
Selenium is an open-source automation testing tool that is used to test web applications. It is widely used by developers and testers to automate web-based applications. It is used to test the functionality of web applications, as well as to validate the user interface of the application. The Selenium framework is used to create and execute automated tests for web applications. The framework is designed to be extensible and allows for the creation of custom test suites and test cases.

Selenium is a powerful tool for automating web applications, but it can be difficult to use. To make it easier to use, there are several frameworks available that provide additional features and functionality. In this article, we will discuss which Selenium framework is mostly used.

What is Selenium?
Selenium is an open-source automation testing tool that is used to test web applications. It is used to test the functionality of web applications, as well as to validate the user interface of the application. Selenium is a powerful tool for automating web applications, but it can be difficult to use. To make it easier to use, there are several frameworks available that provide additional features and functionality.

What is a Selenium Framework?
A Selenium framework is a set of tools and libraries that are used to create and execute automated tests for web applications. The framework is designed to be extensible and allows for the creation of custom test suites and test cases. It also provides a way to organize and manage tests, as well as to integrate with other tools and services.

What are the Different Types of Selenium Frameworks?
There are several different types of Selenium frameworks available. The most popular frameworks are TestNG, JUnit, and Cucumber. Each of these frameworks has its own advantages and disadvantages, and it is important to understand the differences between them before deciding which one to use.

TestNG
TestNG is one of the most widely used frameworks for the Selenium WebDriver, and it includes data-driven functionality. It is a powerful and flexible framework that allows for the creation of custom test suites and test cases. It also provides a way to organize and manage tests, as well as to integrate with other tools and services.

TestNG is easy to use and has a simple syntax. It also provides a way to run tests in parallel, which can help speed up the testing process. Additionally, TestNG has built-in reporting features, which can help to make the results of the tests more easily understood.

JUnit
JUnit is another popular Selenium framework. It is a simple and lightweight framework that is easy to use and has a simple syntax. It is also well-suited for unit testing, and it provides a way to organize and manage tests. Additionally, JUnit has built-in reporting features, which can help to make the results of the tests more easily understood.

Cucumber
Cucumber is a behavior-driven development (BDD) framework that is used to create automated tests for web applications. It is a powerful and flexible framework that allows for the creation of custom test suites and test cases. It also provides a way to organize and manage tests, as well as to integrate with other tools and services.

Cucumber is a powerful framework, but it can be difficult to use. It has a complex syntax and requires a lot of setup and configuration. Additionally, Cucumber does not have built-in reporting features, which can make it difficult to understand the results of the tests.

Which Selenium Framework is Mostly Used?
TestNG is the most widely used Selenium framework. It is a powerful and flexible framework that allows for the creation of custom test suites and test cases. It is also easy to use and has a simple syntax. Additionally, TestNG has built-in reporting features, which can help to make the results of the tests more easily understood.

TestNG is also well-suited for data-driven testing, which is becoming increasingly popular. Data-driven testing allows for the creation of tests that are based on data, rather than code. This can help to make the tests more efficient and reduce the amount of time required to create and execute them.

Conclusion
Selenium is a powerful tool for automating web applications, but it can be difficult to use. To make it easier to use, there are several frameworks available that provide additional features and functionality. TestNG is the most widely used Selenium framework, and it is a powerful and flexible framework that allows for the creation of custom test suites and test cases. It is also easy to use and has a simple syntax. Additionally, TestNG has built-in reporting features, which can help to make the results of the tests more easily understood.