Watir

Watir is an open source Ruby library for automating web browsers to perform functional testing.

Watir drives browsers the same way people do: clicking links, filling out forms, and verifying text. It wraps the Selenium WebDriver engine to provide a more intuitive, Ruby-centric API that simplifies complex DOM interactions. Developers use its clean syntax (e.g., browser.button(id: 'login').click) to build readable test suites for Chrome, Firefox, and Edge. Since its 2003 debut, Watir has remained a standard for Rubyists who prioritize maintainable automation over verbose configuration.

https://watir.com