rubygem-stella helps you to define realistic testplans and run them against your
webapps.

Stella is an agile testing tool for web applications. Software development has
changed in a way that demands a new kind of toolset. Stella integrates quickly
into your existing development process to help you run functional and
performance tests throughout your product lifecycle.

WWW: https://github.com/solutious/stella
RG:  https://rubygems.org/gems/stella