Ruby on Rails
ResponsibleMarkup Plugin

Check the markup of your views in functional tests

This plugin extends the Rails functional tests to provide you with functional tests for:

• (X)HTML markup validity
• Backwards-compatible empty HTML elements
• Well-formed doctypes
• Unobtrusive Javascript
• Well-formed XML prologs
• Separation of display and structure in your markup

svn: http://svn.codahale.com/responsible_markup/trunk

See also Plugins, Original Announcement