PiTest Mutagenesis MutateMe Humbug
from the maker of Mockery (Pádraic Brady)
Requires xdebug*
Ties in with PHPUnit
JSON config
Override/exclude code or test dirs
Set timeouts
Performance optimizations
Incremental Testing (unstable)
composer global require 'humbug/humbug=~1.0@dev'
Make sure ~/.composer/vendor/bin is in $PATH
humbug configure
humbug