infection/infection

Health v2 · maintenance only

Adoption not part of the score

2235 stars · 190 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Infection is a mutation testing framework for PHP that mutates source code to find gaps in test suites. It computes a Mutation Score Indicator (MSI) and integrates with PHPUnit, Codeception, and PHPSpec, with CI enforcement via --min-msi.

Use cases

• measure how good my PHP test suite really is
• find untested code paths beyond line coverage
• enforce a minimum mutation score in CI
• mutate only lines changed in a pull request
• run mutation testing with PHPUnit or Codeception
• generate a test quality badge for my README

When to choose

• you have a PHP project with PHPUnit, PHPSpec, or Codeception tests
• line coverage looks high but you suspect weak assertions
• you want an MSI gate in CI or a quality badge
• you need git-diff-scoped mutation testing for PRs

When to avoid

• your project is not written in PHP
• your test suite is too slow to run repeatedly
• you only need basic coverage reports, not mutation analysis

Facets

library · maturity active

testing cli developer-tools testing developer-tools php cli cross-platform mutation-testing phpunit codeception phpspec test-quality msi ast code-coverage php

Member repositories

For agents

markdown · JSON · MCP: product_card(name="infection/infection")