Cosmic Ray: mutation testing for Python
"Four human beings -- changed by space-born cosmic rays into something more than merely human."
—The Fantastic Four
Cosmic Ray is a mutation testing tool for Python 3.
It makes small changes to your source code, running your test suite for each one. Here's how the mutations look:
The easiest way to contribute is to use Cosmic Ray and submit reports for defects or any other issues you come across. Please see CONTRIBUTING.rst for more details.