The History of Selenium
The following is the wonderful history of Selenium.
Origin of Selenium Core
Once upon a time, in the year 2004, there was a guy named Jason Huggins.
He used to work for ThougtWorks company at Chicago.
He used to repeatedly verify the Time and Expenses application, he was working on an ongoing basis.
He started giving demos to huge audience and soon it let to the discussions to make this tool an open source one for the benefit of automating other such web applications.
This Open Source tool started gaining demand in the market and people started using it for automating the repeated tasks in their Web Applications.
The “Same Origin Policy” Issue
When the web applications started advancing and their complexity got increased, the same has increased the concern for their security measures.
The “Same Origin Policy” followed by different web applications as a security measure, has become an issue for the “Selenium Core” and was started restricting from accessing the Web Applications.
Here comes Selenium RC (Selenium Remote Control)
As this trick was working and adapted by many, the Proxy Server that is used to trick the browser in believing that everything is from the same domain was named as “Selenium RC” (Selenium Remote Control)
Here comes Selenium Grid
The execution of the Automated Tests used to take a good amount of time when there are a large number of tests to be executed in the project.
To overcome this problem and minimize the test execution time, a guy named “Patrick Lightbody” came up with a system known as “Hosted QA”, which was later renamed as “Selenium Grid”.
Using “Selenium Grid”, testers were able to distribute the tests across multiple machines and get them executed them on different machines over their network to reduce or minimize the time taken for overall execution of tests.
Here comes Selenium IDE
The creation of Automation tests used to take a good amount of time using Selenium RC.
To overcome this problem and increase the speed of automation tests creation, there came a guy from Japan named “Shinya Kasatani”, who developed a Firefox extension named as “Selenium IDE”.
“Selenium IDE” using its record and playback feature, records the automation tests like recording a video and executes the recorded tests like playing the recorded videos.
Here come Selenium WebDriver
Before Selenium WebDriver came into picture, there used to be Selenium 1
Selenium 1 used to be the major project of Selenium.
Selenium 1 = Selenium IDE + Selenium RC + Selenium Grid
To overcome this problems, a guy named “Simon Stewart” has come up with the first cross platform testing framework that can control the browsers directly from the OS level of the local machines of the testers.
The cross platform testing framework was named as “Selenium WebDriver”.
“Selenium WebDriver” talks to different browsers without using any tricks.
Here comes Selenium 2
Selenium Team has decided to merge both Selenium WebDriver and Selenium RC to form a more powerful Selenium tool.
They both got merged to form “Selenium 2”
“Selenium WebDriver” was the core of “Selenium 2” and “Selenium RC” used to run in maintenance mode.
Hence Selenium 2 = Selenium IDE + Selenium WebDriver 2.x + Selenium Grid
Here comes Selenium 3
Selenium team has decided to completely remove the dependency for Selenium RC.
Selenium WebDriver was taken to the next level where the dependency of Selenium RC can be completely removed.
Finally Selenium Team has achieved it and released a latest version of Selenium known as Selenium 3.
Hence Selenium 3 = Selenium IDE + Selenium WebDriver 3.x + Selenium Grid
New Selenium IDE
Selenium team has deprecated the older version of Selenium IDE on August 2018 and in place of that released a new version of Selenium IDE into the market.
The latest version of Selenium IDE works on both Firefox and Chrome Browsers.
Looking for the future
Selenium Team has announced of releasing new Selenium version i.e. Selenium 4, but it has not released it yet.
Watch this video on “The History of Selenium” for more clarity:
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Happy Learning 🙂
Arun Motoori (www.QAFox.com)
On a mission to help the Testing community in all possible ways.