propr | Property-based testing for Ruby

propr is a Ruby library. propr has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

The usual approach to testing software is to describe a set of test inputs and their corresponding expected outputs. The program is run with these inputs and the actual outputs are compared with the expected outputs to ensure the program behaves as expected. This methodology is simple to implement and automate, but suffers from problems like:. Property-based testing is an alternative, and complementary, approach in which the general relationships between program inputs and desired output are expressed, rather than enumerating particular inputs and outputs. The properties specify things like, "assuming the program is correct, when its run with any valid inputs, the inputs and the program output are related by f(input, output)". The test framework produces random (valid) inputs, searching for a counterexample.