Quick Test Professional (QTP) is a proprietary automated testing tool previously owned by the company Mercury Interactive before it was acquired by Hewlett-Packard in 2006. The Selenium Tool Suite has many advantages over QTP (as of version 11) as detailed below
| Selenium | QTP |
| Open source, free to use, and free of charge | Commercial |
| Highly extensible | Limited Add on's |
| Can run tests across different browsers | Can only run tests in Firefox, Internet Explorer, and Chrome |
| Supports various operating systems | Can only be used in Windows |
| Supports mobile devices | Supports mobile devices using 3rd party software |
| Can execute tests while the browser is minimized | Needs to have the application under test to be visible on the desktop |
| Can execute tests in parallel | Can only execute in parallel but using Quality Center which is again a paid product |
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Summary
The entire Selenium Tool Suite is comprised of four components:
Selenium IDE, a Firefox add-on that you can only use in creating relatively simple test cases and test suites.
Selenium Remote Control, also known as Selenium 1, which is the first Selenium tool that allowed users to use programming languages in creating complex tests.
WebDriver, the newer breakthrough that allows your test scripts to communicate directly to the browser, thereby controlling it from the OS level.
Learn more about Selenium Interview Questions in this blog post.
Selenium Gridis also a tool that is used with Selenium RC to execute parallel tests across different browsers and operating systems.
Selenium RC and WebDriver was merged to form Selenium 2.
Selenium is more advantageous than QTP in terms of costs and flexibility. It also allows you to run tests in parallel, unlike in QTP where you are only allowed to run tests sequentially.
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