Celerity

Celerity is a JRuby wrapper around HtmlUnit – a headless Java browser with JavaScript support. It provides a simple API for programmatic navigation through web applications. Celerity aims at being API compatible with Watir.

Features

• Fast - No time-consuming GUI rendering or unessential downloads
• Easy to use - Simple API
• JavaScript support
• Scalable - Java threads lets you run tests in parallel
• Portable - Cross-platform thanks to the JVM
• Unintrusive - No browser window interrupting your workflow (runs in background)

http://celerity.rubyforge.org/