About

This project was created for the Kontaktstudium Informatik and provides a way to unit test programs written in the Scratch programming language that are submitted by students to defined algorithmic exercises.

Note

Algorithmic is important here as this project considers sounds, images, movement, other sensing functionality and concurrency (whose order is undefined in Scratch) out-of-scope, ignores it where possible and rejects whole files where ignoring is not possible.

Repositories

Bast3St is split into multiple repositories that build on each other, the most important ones are:

• github:marcel-scherzinger/bast3st-scratch: direct handling of Scratch semantics and files

  • scratch-test-value: implements how Scratch defines computations like arithmetic operations or coercions

  • scratch-test-model: parses the Scratch-file-format sb3

  • scratch-test-interpreter: allows running a parsed Scratch program with given inputs and defined limits

• github:marcel-scherzinger/bast3st-eval: takes JSON data that describes what a program should be tested for and creates a detailed report

• github:marcel-scherzinger/bast3st-web: listens for requests to analyze programs, responds with reports and stores everyting in a Postgres-database

• github:marcel-scherzinger/bast3st: Python library to generate JSON specifiactions by writing scripts with type hinting support and CLI program that allows interacting with a server

What’s with the name?

Bast3St	The project is about Scratch and it starts with S
Bast3St	The file extension of Scratch is sb3
BasteSt	Bastet is the egyptian god of cats
BasteSt	This project is about testing