Infection vs mutator
Infection
infection.github.iomutator
pdonatbouillud.comSide by side
| Figure | Infection | mutator |
|---|---|---|
| Price from | — | — |
| Free plan | — | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| Plans published | 0 | 0 |
| Spec score · Mutation Testing Tools | 7.6 (#11) | 6.9 (#21) |
| Installation | The maker documents PHAR, Phive, Composer, Git, and Homebrew installation methods. | The released version can be installed from CRAN with install.packages("mutator"), and development versions are available from GitHub and R-universe. |
| License | The project is released under the BSD-3-Clause License. | The package is licensed under GPL (>= 3). |
| Mutation score | It reports a Mutation Score Indicator (MSI) that measures the percentage of generated mutations detected by the tests. | It reports the ratio of killed mutants to total mutants as a measure of test suite effectiveness. |
| Purpose | Infection mutates PHP source code and reports changes that a test suite fails to catch. | mutator is an automated mutation testing tool for the R language that checks whether a test suite detects systematic changes to source code. |
In their own words
Infection
Infection is a PHP mutation-testing library that shows which changes a test suite fails to detect. It creates mutants using predefined operators, runs tests against changed code, and records killed and escaped mutants, errors, and timeouts. Its Mutation Score Indicator measures the share of generated mutations detected by tests; it also reports Mutation Code Coverage and Covered Code Mutation Score Indicator. Infection supports PHPUnit, PhpSpec, Codeception, and Testo, and runs from the command line at a project root. Teams can run mutated tests in parallel, focus analysis on touched lines or files, and set minimum mutation-score thresholds that fail a build. The homepage describes more than 100 mutators grouped into profiles and allows custom mutators. Optional PHPStan and Mago integrations can help catch escaped mutants involving type violations, dead code, and unreachable paths. Installation options include PHAR, Phive, Composer, Git, and Homebrew. A browser playground supports trying PHP code and tests without installing the tools. Infection is free under the BSD-3-Clause license and requires PHP 8.3 or newer plus Xdebug, phpdbg, or pcov.
mutator
mutator has no write-up on Specifiction yet; its figures are above.