Selenium has transformed web automation testing since its inception in 2004. Initially developed by Jason Huggins as Selenium Core, it faced security restrictions, leading to the creation of Selenium RC (2005) by Paul Hammant, which introduced a proxy server for cross-domain testing. However, Selenium WebDriver (2008) by Simon Stewart replaced RC by directly controlling browsers using native APIs, making tests faster and more stable. To enhance scalability, Selenium Grid (2011) by Philippe Hanrigou enabled parallel execution. In Selenium 2 (2011), WebDriver officially replaced RC, marking a significant advancement. Selenium 3 (2016) improved browser compatibility, while Selenium 4 (2021-Present) introduced W3C-compliant WebDriver, relative locators, and enhanced debugging, making it the most efficient and modern web automation tool today.
Introduction to Selenium
What is Selenium?
Why use Selenium for automation testing?
Selenium Components
Selenium IDE
Selenium WebDriver
Selenium Grid
Selenium Features & Advantages
Cross-browser & cross-platform support
Multiple programming language support
Open-source and community-driven
Selenium WebDriver Overview
How WebDriver interacts with browsers
Example test automation script
Locators in Selenium
Types of locators (ID, Name, XPath, CSS, etc.)
Handling Web Elements & Events
Working with text fields, buttons, checkboxes, alerts, etc.
Selenium Grid & Parallel Execution
Running tests on multiple browsers/machines
Challenges & Limitations of Selenium
Handling dynamic elements, pop-ups, and mobile testing
Best Practices in Selenium Automation
Using explicit waits
Page Object Model (POM)
Logging & reporting tools
Selenium Integrations
TestNG, JUnit, Jenkins, CI/CD tools
Career Opportunities in Selenium Testing
Job roles & industry demand