In property-based testing, several properties that the System Under Test must respect are defined, and a large sample of generated inputs is sent to it in an attempt to break the properties. With a few lines of code, hundreds of test cases can be generated and run.
"Don't write tests. Generate them."
-- John Hughes
Eris is the `Greek goddess`_ of chaos, strife, and discord. It tries to break your code with the most random and chaotic input and actions.