@infection_php

Mutation Testing library for PHP based on AST

 Poland
infection.github.io/
Joined July 2017
  • Tweets432
  • Following1
  • Followers2.3K
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Infection PHP retweeted
Matt Pocock
@mattpocockukAug 2
Anyone using agents/tools to do mutation testing? Seems like it would ROCK during automated review for flushing out which branches of the code are actually covered by tests.
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Infection PHP retweeted
Aleksei Gagarin@roxblnfkMay 7
Lately I've been working on integrating #Testo #PHP with @infection_php There's still more ahead, but in the meantime you can read my fresh article about mutation testing php-testo.github.io/docs/the…

Testo

Modern PHP Testing Framework

php-testo.github.io
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Infection PHP retweeted
Vincent Amstoutz@vinceAmstoutzMay 2
Replying to @infection_php
I use it in a project and it's a killer feature! 🚀
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Looks like #phpunit xml code-coverage generation could get nearly twice as fast in the future. this would for example considerably reduce overhead of the necessary "initial-test" step when running @infection_php on your project.
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Blogged about my hands-on experience with @infection_php Its a short super top level article to give you an overall idea what to expect from it. what do you think about that? feedback welcome. staabm.github.io/2025/08/01/…

Mutation testing with Infection in PHP

Recently I started playing with Infection, a mutation testing framework for PHP. Mutation testing is a technique to evaluate the quality of your tests.

staabm.github.io
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In case you are getting timed-out #mutants while mutation testing with @infection_php (e.g. because of infinite loops), the upcoming release should run faster for you. on infection/infection with 16 timed-out mutants, we saw a ~21% perf boost 🚀
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past few weeks I have concentrated my opensource efforts onto @infection_php. focus was on developer experience - make it easer for newcomers to apply the tool and reduce noise by removing redundant mutations. this got just released. feedback welcome. #dx #mutationtesting
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Running a few @infection_php performance tests on the #valinor codebase, to get an idea how we progressed in newer versions and latest dev-master. seems were are working in a good direction 🚀
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Infection PHP retweeted
Maks Rafalko@maks_rafalko16 May 2025
It was interesting to play with @phpstorm Junie. As a result, now both infection.github.io/guide and infection-php.dev have dark themes, written almost completely by Junie.
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Infection PHP retweeted
Maks Rafalko@maks_rafalko26 Feb 2025
Have you heard about Conductor? We have already integrated it with @infection_php.
Packagist
@packagist4 Dec 2024
We're excited to introduce you to 🧑‍✈️Conductor! Automatic dependency update PRs with Composer for PHP projects - Security fixes patched in minutes - Continuous updates without the hassle - all running in your own CI env! #composerphp #php #phpc
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Infection 0.29.2 has been released with a new diff inline highlighting logic for `--show-mutations` option. Now it's easier to spot the change. Thank you @slamzoe
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Infection PHP retweeted
Maks Rafalko@maks_rafalko4 May 2024
Discussing with @OndrejMirtes how PHPStan can be integrated into Infection "natively" to kill Mutants that aren't killed by tests. github.com/phpstan/phpstan/d… If you have ideas, please participate.

Run PHPStan programmatically and get analysis results · phpstan phpstan · Discussion #10966

Hello. My question/request is quite specific because we need to run PHPStan under the hood of @infection - Mutation Testing library - to check if modified files still pass SA. attention: understand...

github.com
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Using the code coverage percentage as a measure of quality of your codebase is a bad idea, here's what to do instead: #quality #SoftwareEngineering #testing dkarlovi.github.io/lying-cov…

Your code coverage is lying - Dalibor Karlović

Code coverage is a metric which does NOT represent how much or how well our code is tested.

dkarlovi.github.io
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💖 I'm sponsoring @infection_php github.com/sponsors/infectio…

Sponsor @infection on GitHub Sponsors

Mutation Testing for PHP. Helps writing better code and tests.

github.com
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Infection PHP retweeted
Ryan Weaver@weaverryan8 Apr 2024
So.... I have incurable brain cancer and I'm asking for your love & support 💖
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Replying to @HelloAidanCasey @alexfwulf @enunomaduro
That one. With infection testing you have real coverage report. Otherwise you only know that the code was executed - okay, no syntax error. Phpstan tells me the same. 😅
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Infection PHP retweeted
Maks Rafalko@maks_rafalko17 Mar 2024
Implemented another idea of reducing execution time for Mutation Testing on one of the stage: github.com/infection/infecti… Below is a real example of how it will affect @infection_php execution for PHP-CS-Fixer:
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Mutation testing in #PHPCSFixer is ready 🥳! When it's merged, all pull requests will be covered with @infection_php & checked if added/modified files are mutants-proof. It will enforce really good tests quality (which already has been high with MSI=80). github.com/PHP-CS-Fixer/PHP-…
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💡 Did you know that @infection_php has its own playground? I did not! I found the infection-php.dev URL in the docs but I think it would be much better if it was exposed more, that's why I created PR that added links on landing page & to top menu. github.com/infection/site/pu…
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I did an experiment and added mutation testing to the #PHPCSFixer, it looks like Fixer's MSI is higher than @infection_php's 😅. Or..... I did something wrong 😆. PR: github.com/PHP-CS-Fixer/PHP-…
Maks Rafalko@maks_rafalko7 Mar 2024
Replying to @_Codito_ @infection_php
For sure fixer's tests are not completely useless, I just gave an extreme example for clarity. But you can only guess how good the test suite is without MSI. For example MSI for Infection itself is 76% - still a lot to improve!
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