simplecov-ruby/simplecov

Health v2 · maintenance only

Adoption not part of the score

4918 stars · 579 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

SimpleCov is a code coverage analysis library for Ruby built on Ruby's built-in Coverage library. It provides a clean API to filter, group, merge, and format coverage results, with automatic merging of coverage across test suites and built-in HTML and JSON formatters.

Use cases

• measure code coverage of my Ruby test suite
• merge coverage results across unit and integration tests
• generate an HTML coverage report for a Rails app
• track which lines of my Ruby code are untested
• set up code coverage for RSpec or Minitest
• enforce a minimum coverage threshold in CI

When to choose

• you need code coverage metrics for Ruby or Rails projects
• you want coverage merged across multiple test suites
• you want a quick setup with just a couple of lines in your test helper

When to avoid

• you need coverage for languages other than Ruby
• you need branch-level coverage tooling beyond what Ruby's Coverage library provides

Facets

library · maturity stable

testing developer-tools testing developer-tools web-development ruby code-coverage test-coverage coverage-report ruby-gem rails

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