Selenium is an open source automation tool and definitely a great JavaScript automated testing framework which supports all operating systems and browsers such as Mozilla, Safari, Firefox, and IE. In addition, it runs multiple tests and supports programming languages such as Java, C#, Ruby, and Python. PhantomJS can be termed as yet another powerful tool for testing. It supports varied web standards and it is scriptable with JavaScript API which permits webpage capturing, pages manipulation, access to file system and page settings. Selenium Many people would go with Selenium as it stands as an ideal choice when you need a specific JavaScript engine and also when your site uses peculiar browser detection. And being easier in development, Selenium bags some brownie points. PhantomJS PhantomJS runs good as it has no dependencies and runs on the command-line. It easily gets into the development workflow such as in GIT pre-commit hook or testing stage on the integration server. And then there’s lots you can do with PhantomJS. The CasperJS project makes good use of the PhantomJS API and if you already have Node.js installed it’s a quick and easy way to play with some of the PhantomJS capabilities. CasperJS, aside from requiring NodeJS, only drives PhantomJS. CasperJS Another silent contender in this war is CasperJS. CasperJS is an open source navigation scripting & testing utility written in JavaScript for the PhantomJS WebKit headless browser and SlimerJS (Gecko). Casper eases the process of defining a full navigation scenario and provides useful high-level functions, methods & syntactic sugar for doing common tasks. What makes PhantomJS a good choice? - Headless website testing – You can run functional tests along with the frameworks like QUnit, Jasmine, Mocha, Capybara, WebDriver etc. - Screen capture – One can programmatically capture varied web content such as Canvas and SVG. You can develop web site screenshots along with thumbnail preview. - Page automation – Now, just access and manipulate your webpages with the frameworks and standards like DOM API, or any with libraries such as jQuery. - Network monitoring – You can automate performance analysis with the help of Jenkins and YSlow. And also, you can monitor page loading and export as all standard HAR files. Advantages of PhantomJS coding - The development can be very easier. While developing the UI, you can write the code by selecting the HTML element wherever you wanted. - As PhantomJS uses Qt Web kit, the developed browser exactly looks like a real browser. - Manual testing is very easier with the help of PhantomJS Applications. - Available on major operating systems: Windows, Mac OS X, Linux, and other Unices. - Pure headless on Linux, ideal for continuous integration systems. It also runs on Amazon EC2, Heroku, and Iron.io.

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17. http://www.algoworks.com/blog/choosing-your-automated-testing-
frameworks-phantomjscasperjs-vs-seleniumBLOG LINK