This is useful for such things as maintenance mode, testing, and heavy migrations.

Ruby Selenium SDK for testing with Smart UI

Helper for caching builds when using 'build for testing' & 'test without building'

Capture snapshots to simplify testing and to analyze how state changes over time.

Integration tests for testing adherence to the beanstalkd protocol

Ruby A/B testing

Splits experiment cohorts for A/B testing

Absurdly simple a/b testing

Distribut automated testing framework for Web or App.

Basic AB testing gem

Ruby A/B testing on MongoDB

Bogus Gateway useful for testing applications using ActiveMerchant with Paypal

AffirmIt! is the supportive testing framework for Ruby..

Testing gem creation for airhelp test

Contains all required testing gems as well as some rake tasks and test helpers to make getting a test suite up and running easy and fast.

Headless Browser for Integration Testing with Capybara

Testing

Ambidexter hands two hands and will give bouth to help you in testing your network for HTTP stuff

Yet another HTTP smoke testing framework.

Helper for testing API