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[Emoji 18.0] Provides Unicode Emoji data and regexes, incorporating the latest Unicode and Emoji standards. Includes a categorized list of recommended Emoji.

A modern approach to code coverage.

A library for working with Abstract Syntax Trees.

Run any kind of code in parallel processes

A plugin specification for linter and formatter rulesets

A Ruby parser written in pure Ruby.

Test fixtures for running in Async::HTTP.

RuboCop is a Ruby code style checking and code formatting tool. It aims to enforce the community-driven Ruby Style Guide.

Racc is an LALR(1) parser generator. It is written in Ruby itself, and generates Ruby program. NOTE: Ruby 1.8.x comes with Racc runtime module. You can run your parsers generated by racc 1.4.x out of the box.

A native reimplementation of Ruby's Coverage module with accumulating line counts.

RBS is the language for type signatures for Ruby and standard library definitions.

A fast and scalable test runner.

A library for tokenizing, lexing, and parsing Ruby regular expressions.

Topological sorting using Tarjan's algorithm