Selenium

Selenium enables the automation of web browsers and is particularly useful for testing web applications. It supports multiple programming languages and browsers, providing a flexible API for interacting with web pages.

Use this profile to understand the building block briefly, place it in the model, and open related building blocks.

Content type

Technology

Technical building block: can be automated, integrated, or operated.

Classification level

Element

Concrete cog in the system that works inside larger relationships.

In brief

Selenium in brief

Selenium is an open-source project for automating web browsers, allowing applications to be tested and controlled through their real browser interface.

Where does it come from?

Selenium began at ThoughtWorks in 2004, when Jason Huggins created JavaScriptTestRunner, which became Selenium. The project grew into a suite including WebDriver and became further grounded in the W3C WebDriver standard.

The mental model

A test describes actions and expectations from a browser user’s perspective. WebDriver connects test code to the browser, which performs interactions and returns state. Robust tests wait for meaningful states and assert behavior rather than implementation details.

Key building blocks

WebDriver

A standardized interface through which test code drives a browser natively.

End-to-end test

Checks a flow across multiple layers from a user’s perspective.

Selenium Grid

Distributes browser execution across environments and devices.

When is it useful?

Selenium matters for reproducible browser and regression tests across browsers and operating systems. Test stability depends on synchronized state, isolated data, and well-chosen assertions.

Selenium Documentation