WIVET is a benchmarking project that aims to statistically analyze web link extractors. In general, web application vulnerability scanners fall into this category. These VAs, given a URL(s), try to extract as many input vectors as possibly they can to increase the coverage of the attack surface.

WIVET provides a good sum of input vectors to any extractor and presents the results. In order an input extractor to run meaningfully, it has to provide some kind of session handling, which nearly all of the decent crawlers do.

As a side note, you don't have to (though encouraged) download and setup your own WIVET. (You can basically visit WGT Page). Just make sure you read usage page first!

WIVET v3 is released (Try the SVN for up-to-date teasers...)