What is Selenium? Introduction to Selenium Automation Testing

lella keerthi
3 min readMay 29, 2021

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What is Selenium?

Selenium is a free (open-source) automated testing framework used to validate web applications across different browsers and platforms. You can use multiple programming languages like Java, C#, Python etc to create Selenium Test Scripts. Testing done using the Selenium testing tool is usually referred to as Selenium Testing. know more at Selenium online training

Selenium Software is not just a single tool but a suite of software, each piece catering to different Selenium QA testing needs of an organization. Here is the list of tools

  • Selenium Integrated Development Environment (IDE)
  • Selenium Remote Control (RC)
  • WebDriver
  • Selenium Grid

At the moment, Selenium RC and WebDriver are merged into a single framework to form Selenium 2. Selenium 1, by the way, refers to Selenium RC.

Selenium Basic Terminology

Before proceeding with this tutorial, let us first understand some of the key concepts associated with Automation testing of an application.

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With the growing need for efficient software products, every software development group need to carry out a series of tests before launching the final product into the market. Test engineers strive to catch the faults or bugs before the software product is released, yet delivered software always has defects. Even with the best manual testing processes, there’s always a possibility that the final software product is left with a defect or is unable to meet the end user requirement. Automation testing is the best way to increase the effectiveness, efficiency and coverage of your software testing.

Automation Testing

Automation testing uses the specialized tools to automate the execution of manually designed test cases without any human intervention. Automation testing tools can access the test data, controls the execution of tests and compares the actual result against the expected result. Consequently, generating detailed test reports of the system under test. know more at Selenium training course

Automation testing covers both functional and performance test on an application.

  • Functional automation is used for automation of functional test cases. For example, regression tests, which are repetitive in nature, are automated.
  • Performance automation is used for automation of non-functional performance test cases. For example, measuring the response time of the application under considerable (say 100 users) load.

Automation Testing tools which are used for functional automation:

  • Quick Test Professional, provided by HP.
  • Rational Robot, provided by IBM.
  • Coded UI, provided by Microsoft.
  • Selenium, open source.
  • Auto It, open Source.

Automation Testing tools which are used for non-functional automation:

  • Load Runner, provided by HP.
  • JMeter, provided by Apache.
  • Burp Suite, provided by PortSwigger.
  • Acunetix, provided by Acunetix.

Automation Testing Life Cycle

Why Automated Testing

Automation testing has specific advantages for improving long-term efficiency of any software. The key benefits of test automation are:

  • Automated testing has long been considered beneficial for big software organizations. Although, it is often thought to be too expensive or difficult for smaller companies to implement.
  • Automated testing tools can be programmed to build and execute test scripts at a specific time without involving any human intervention.For instance, automated test can be automatically kicked off overnight, and the testers can analyse the results of the automated the next morning.
  • Automated testing tools are able to playback pre-recorded and pre-defined actions. know more at Selenium course
  • Automation testing supports frequent regression testing.
  • It provides rapid feedback to developers.
  • It provides unlimited iterations of test case execution.
  • It provides disciplined documentation of test cases.
  • Automated test generates customized defect reports.
  • Less error prone as compared to manual testing.

Test Automation for Web Applications

If we take a look at the type of software applications prevailing in current market scenario, most of the software applications are written as web-based applications to be run in an internet browser. The testing strategy for web-based applications varies widely among companies and organizations.In an era of highly interactive and responsive software processes where many organizations are using some form of agile methodology, test automation is frequently becoming a requirement for software projects.

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