Rantly

What Rantly is

Rantly is a free, self-hosted Ruby library for generating random test data and running property-based checks. Its methods return values such as strings, integers, and floats through an implementation described as a recursive-descent interpreter. Generators cover integers, ranges, floats, booleans, choices, weighted frequencies, arrays, strings, and hashes. The README documents integrations for Test::Unit, Minitest, and RSpec. Property checks run 100 times by default; the count can be changed with an argument to `check` or the `RANTLY_COUNT` environment variable. Optional shrinking can reduce failing values, but its search is limited to at most 1,024 operations and does not fully traverse the failure tree. Ordinary arrays and hashes are not shrunk. The project is published under the MIT License and welcomes contributors. Installation is through `gem install rantly` or a Gemfile. The README says Ruby 3.2 or higher is required, while the RubyGems listing for version 3.0.0 specifies Ruby 3.3.0 or higher.