Webunit is a framework for unit testing websites:
Browser-like page fetching including fetching the images and stylesheets needed for a page and following redirects Cookies stored and trackable (all automatically handled)
HTTP, HTTPS, GET, POST, basic auth all handled, control over expected status codes, ...
DOM parsing of pages to retrieve and analyse structure, including simple form re-posting
Two-line page-fetch followed by form-submit possible, with error checking
Ability to register error page content across multiple tests
Uses python's standard unittest module as the underlying framework
May also be used to regression-test sites, or ensure their ongoing operation once in production (testing login processes work, etc.)