The Cucumber Compatibility Kit (CCK) aims to validate a Cucumber implementation's support for the Cucumber Messages protocol.

RSpec is a behavior-driven development (BDD) framework for Ruby. This meta-package includes the RSpec test runner, along with the expectations and mocks frameworks.

Rspec-expectations provides a simple API to express expected outcomes of a code example.

Fivemat is a MiniTest/RSpec/Cucumber formatter that gives each test file its own line of dots during testing. It aims to provide test output that is neither too verbose nor too minimal.

Asciidoctor is a text processor and publishing toolchain for converting AsciiDoc content to HTML5, DocBook 5, PDF, and other formats.

Cucumber Expressions offer similar functionality to Regular Expressions, with a syntax that is easier to read and write. Cucumber Expressions are extensible with parameter types.

MiniTest Moar add some additional features and changes some default behaviours in MiniTest. For instance, Moar replaces the MiniTest Object#stub with a global stub method.

Mini-portile is a port/recipe system for Ruby developers. It provides a standard way to compile against specific versions of libraries to reproduce user environments.

Diff::LCS computes the difference between two Enumerable sequences using the McIlroy-Hunt longest common subsequence (LCS) algorithm. It includes utilities to create a simple HTML diff output format and a standard diff-like tool.

Rake-compiler provides a framework for building and packaging native C and Java extensions in Ruby.

Sanitize is a whitelist-based HTML and CSS sanitizer. Given a list of acceptable elements, attributes, and CSS properties, Sanitize will remove all unacceptable HTML and/or CSS from a string.

This library provides methods to read Adobe Font Metrics (afm) files and use the data therein.

Shoulda Matchers provides RSpec- and Minitest-compatible one-liners that test common Rails functionality. These tests would otherwise be much longer, more complex, and error-prone.

Haml is a layer on top of HTML or XML that is designed to express the structure of documents using indentation rather than closing tags. It was originally envisioned as a plugin for Ruby on Rails, but it can function as a stand-alone templating engine.

Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests. This is an older version of VCR that is free software under the Expat license. The project later switched to the Hippocratic license, which is non-free. Do not use it in new free software projects.

RDoc produces HTML and command-line documentation for Ruby projects. RDoc includes the +rdoc+ and +ri+ tools for generating and displaying documentation from the command-line.

This package adds step-by-step debugging and stack navigation capabilities to pry, using byebug.

This package provides a Ruby library to perform different operations with permutations of sequences, such as strings and arrays.

VersionGem aims to provide introspection of a Version module based on a Version::VERSION constant string wile not interfering with gemspec parsing where the VERSION string is traditionally used.

This package provides a subclass of Object that includes the Comparable module for handling dates.

Org-ruby is an org-mode parser written in Ruby. The most significant thing this library does today is convert org-mode files to HTML or Textile or Markdown.

This package provides support for encoding and decoding binary data using a Base64 representation.

This library provides Ruby with an interface for validating JSON objects against a JSON schema conforming to JSON Schema Draft 4. Legacy support for JSON Schema Draft 3, JSON Schema Draft 2, and JSON Schema Draft 1 is also included.

Concurrent Ruby includes concurrency tools such as agents, futures, promises, thread pools, actors, supervisors, and more. It is inspired by Erlang, Clojure, Go, JavaScript, actors, and classic concurrency patterns.