WATIR stands for "Web Application Testing in Ruby". See WATIR project for more information. This is a Safari-version of the original IE-only WATIR.

Helpers and matchers for testing capistrano

xcmonkey is a tool for doing randomised UI testing of iOS apps

A minimal implementation of integration testing within RSpec. Allows you to build sequential specs, each with a description, but where state is maintained between tests and before/after actions are only triggered at the beginning and end of the entire sequence. Cool things you can do w...

Objected oriented acceptance testing for Rails, using personas.

PropCheck allows you to do property-based testing, including shrinking. (akin to Haskell's QuickCheck, Erlang's PropEr, Elixir's StreamData). This means that your test are run many times with different, autogenerated inputs, and as soon as a failing case is found, this input is simplified, in the...

luhnacy can be used to validate strings for Luhn compliance as well as generating valid or invalid strings for the purposes of testing

'extensions' is a set of extensions to Ruby's built-in classes. It gathers common idioms, useful additions, and aliases, complete with unit testing and documentation, so they are suitable for production code. See http://extensions.rubyforge.org for full documentation.

A diff based testing framework for static sites.

Cache delivery method for ActionMailer for testing emails with Selenium

Simplify API integration testing with a succinct rspec DSL and generate Swagger files directly from your rspecs

Mutation testing for ruby

Ruby gem to help testing tasks with Beaker

Acceptance testing your AMIs

Google Compute Engine support for the Beaker acceptance testing tool.

Taza is an opionated browser-based testing framework.

Series of BDD cucumber rules for testing API endpoints

Page Object like DSL for testing mobile application

There is currently a proposal for the ruby language to call malloc_trim(0) on GC runs to more efficiently give memory back to the operating system. This is a gem giving access to malloc_trim to ruby land to ease testing.

Puppetlabs testing tool coupled with Beaker