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Code Coverage

See on ruby-toolbox ↗ Utilities that report which code is being run. Most commonly this is used as test coverage which reports what parts of your code are not tested, but there are also tools to find dead production code

recent from @rubygems

coverband

Rack middleware to measure production code usage (LOC runtime usage)

  • 7.0.0.rc.2 Oct 20 2026 gem.coop system

minitest-cc

Minitest plugin, add code coverage metrics.

  • 1.0.0 Apr 12 2023 gem.coop system

oyencov

Usage-weighted test coverage for Rails

  • 0.0.9 May 08 2024 gem.coop system

simplecov

Code coverage for Ruby

  • 1.3.2 Sep 30 2026 gem.coop system

single_cov

Actionable code coverage.

  • 2.1.0 Apr 16 2026 gem.coop system

undercover

Actionable code coverage - detects untested code blocks in recent changes

  • 0.9.0 Oct 26 2026 gem.coop system

older from @rubygems

cover_me

CoverMe - Code Coverage for Ruby 1.9

  • 1.2.0 Sep 07 2011 gem.coop system

coveralls

A Ruby implementation of the Coveralls API.

  • 0.8.9 Nov 12 2015 gem.coop system

covered

A modern approach to code coverage.

  • 0.9.0 Jan 31 2019 gem.coop system

deep-cover

In depth coverage of your Ruby code.

  • 1.1.0 Jan 08 2021 gem.coop system

rcov

Code coverage analysis tool for Ruby

  • 1.0.0 Jan 21 2012 gem.coop system