Rails internals: application bootup, plugins, generators, and rake tasks.

rspec-expectations provides a simple, readable API to express expected outcomes of a code example.

RSpec's 'test double' framework, with support for stubbing and mocking

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. This is release 1.4.3, providing a simple extension that allows fo...

Support utilities for RSpec gems

Rack provides a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between (the so-called middleware) into a single...

A common interface to multiple JSON libraries, including Oj, Yajl, the JSON gem (with C-extensions), the pure-Ruby JSON gem, NSJSONSerialization, gson.rb, JrJackson, and OkJson.

Nokogiri (鋸) makes it easy and painless to work with XML and HTML from Ruby. It provides a sensible, easy-to-understand API for reading, writing, modifying, and querying documents. It is fast and standards-compliant by relying on native parsers like libxml2 (C) and xerces (Java).

A flexible two-column Jekyll theme.

A simple Jekyll theme for words and pictures.

The mime-types library provides a library and registry for information about MIME content type definitions. It can be used to determine defined filename extensions for MIME types, or to use filename extensions to look up the likely MIME type definitions. Version 3.0 is a major release that requi...

Send RPCs from Ruby using GRPC

Selenium implements the W3C WebDriver protocol to automate popular browsers. It aims to mimic the behaviour of a real user as it interacts with the application's HTML. It's primarily intended for web application testing, but any web-based task can automated.

A collection of data structures and utilities to make thread-safe programming in Ruby easier

Ruby FFI library

The easiest way to automate beta deployments and releases for your iOS and Android apps

Use with Net::HTTP to do multipart form postspec. IO values that have #content_type, #original_filename, and #local_path will be posted as a binary file.

A really Ruby Mail handler.

Ruby CoffeeScript is a bridge to the JS CoffeeScript compiler.

Rack::Test is a small, simple testing API for Rack apps. It can be used on its own or as a reusable starting point for Web frameworks and testing libraries to build on. Most of its initial functionality is an extraction of Merb 1.0's request helpers feature.