A translation into Janet of parts of MiniPBT -- code from a series of articles about property-based-testing by kurtschelfthout.
I've thought for some time that it would be nice to have an appropriate generative testing library for Janet. I thought to port Hypothesis but after trying to understand its source and related papers on a number of occasions, eventually put things on hold as I did not reach a point where felt I understood it well enough to go through with trying to implement (and maintain) it.
Somewhat later, I came across a series of articles about property-based testing in which the author was kind enough to build up three simple implementations (with working code even!).
The first two were based on familiar approaches [1] but the third one in the article series was not. Allegedly, it was even simpler to understand than Hypothesis and there seemed to be some hope of delivering decent enough results.
This repository is primarily about a Janet translation of the code in this "new found" approach.
The approach of interest was covered in the Random All the Way Down article (the sixth in the series) and the file, random-based.janet, contains a translation attempt.
There is also another file, vintage.janet, which is a
translation of code from the second article, The Essentials of
Vintage
QuickCheck.
This is included for comparison purposes and might be a better
starting point for understanding as it's simpler and the code has a
fair bit of overlap with what's in random-based.janet.
If this repository and/or the related ideas are of interest, I recommend reading at least the first two articles of the series (starting with this one) plus the sixth one, and then either attempting your own translation or taking a look at what's in this repository.
Alternatively (or additionally), you might take a look at the Random testing parts of CsCheck -- the library that inspired the sixth article.
Many thanks go out to the following folks:
- AnthonyLoyd - author of CsCheck, the library that the sixth article in the series was inspired by.
- DRMacIver - creator of Hypothesis, the system I studied (and applied successfully) but failed to understand well enough to translate.
- kurtschelfthout - author of article series, related code, and FsCheck.
[1] The three implementations are inspired by:
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent