Show HN: PBT – A property-based testing library for Ruby

Post by Alifatisk » Thu, May 23, 2024, 10:48 AM UTC

sam2426679 wrote: post #18

portpecos wrote: post #13

Earlier quoted context omitted.

Ruby just simply isn’t the glue language winner because of the heavy emphasis on rails. From a systems perspective, I had to switch to python because it has pyroute2, which supports rtnl, devlink, ethtool and more. I would have thought ruby had a full-fledged netlink library right now considering the stability of chef and puppet. But all I could find was this from 8 years ago: https://github.com/BytemarkHosting/netli…

> I wish it was all ruby Why do you not wish it was all Python?

Post by ohbarye » Thu, May 23, 2024, 1:11 PM UTC

parentheses wrote: post #9

jack_riminton wrote: post #6

Interesting! I wonder how this could be applied to a Rails project (since that's what ruby is most used for). For example how would it know to test a wide selection of possible values for different variables if they're not explicitly set up?

I imagine it wouldn't be too hard to build up your own data generators for Rails models (or other entities).

    Pbt.assert do
      Pbt.property(name: Pbt.printable_string, age: Pbt.integer(min: 0, max: 100)) do |name:, age:|
        user = User.new(name: name, age: age)
        # write your test here
      end
    end

Post by ohbarye » Thu, May 23, 2024, 1:18 PM UTC

Lio wrote: post #29

Lovely stuff, thank you. It would be cool if we could eventually make use of RBS or inline Sorbet or something better than both to get the types for property testing for free.

Post by ohbarye » Thu, May 23, 2024, 3:55 PM UTC

bloopernova wrote: post #15

Can anyone recommend an introduction to PBT for someone who knows nothing about it? Edited to add: D'oh! There's an explanation in the linked repo.