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Selenium

What is Selenium ?

Selenium an open source web testing toll which is widely used in information technology industry for test automation.It was originally developed by Jason Huggins as an internal testing tool for ThoughtsWorks. 

Many Companies , let's say most are currently developing web based solutions to be run in an internet browser. Selenium support all common browsers for automation. Also it supports to write/run test cases without learning scripting languages as well as to all common languages such as Java, C#, PHP, Python, Ruby and Groovy scripts. Hence QA engineer able to use own test cases and run through selenium. 

Selenium is not just single tool but is set of tool which are used in various scenarios.  Lets understand about them.


Selenium IDE : Integrated Development Environment 

This is a Firefox plugin/Add-on that let testers to record their activities and playback. Also then testers capable of edit recorded tests and debug as well, 

Selenium RC : Remote Controller  

This is a server which is written in Java that accept commands (for browser) via HTTP. This let user to write own test cases from above mention common languages and run with it.

Selenium RC has been officially deprecated with selenium web driver. 

Selenium Web Driver

This is the most successor to selenium RC which will send commands to browser and retrieve results. 

Selenium Grid

This also a server which use to test web instances running on remote machines. Actually here this act as hub and all tests should contact this hub to get access for browsing. This is mostly used to run parallel tests  across different machines and browsers simultaneously which measure execution time.


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