Saturday, 19 October 2013

Selenium WebDriver

WebDriver is a web automation framework which allows us to execute tests against different browsers.We can use any programming language(Java,.Net,PHP,Python,Perl,Ruby) to write test scripts.

we can use conditional operations like if-then-else or switch-case

Lets see few similarities between WebDriver and Selenium RC
Both allows us to use programming language in designing test .
Both allow us to run tests against different browsers.



Selenium RC’s architecture is bit more complicated.
We need to launch a application called Selenium Remote Control Server before starting testing
Selenium RC works only using JavaScript for its every command. That means that everything you write is eventually translated into Javascript and run in the browser.
The browser will obey the instructions of Selenium Core, and will relay its response to the RC Server.
The RC Server will receive the response of the browser and then display the results.
RC Server will fetch the next instruction from your test script to repeat the whole cycle.

However WebDriver interacts directly with browser and uses the browser’s own engine to control it,that is what makes webdriver faster.


Remember that WebDriver operates on the OS level. Also remember that different browsers communicate with the OS in different ways. If a new browser comes out, it may have a different process of communicating with the OS as compared to other browsers. So, you have to give the WebDriver team quite some time to figure that new process out before they can implement it on the next WebDriver release.
However, it is up to the WebDriver’s team of developers to decide if they should support the new browser or not.


Note that while Selenium RC has been oficially deprecated, the WebDriver is now being developed rapidly and it still suffers from several child-illnesses and is not in its full strength. That said, using WebDriver, you can do anything Selenium RC can do. And sometimes more. With an occasional minor bug.


I will recommend the following link for any one who is trying to learn webdriver
Seleniumhq.org

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