Deriving Compositional Random Generators
Paper in proceedings, 2019

Generating good random values described by algebraic data types is often quite intricate. State-of-the-art tools for synthesizing random generators serve the valuable purpose of helping with this task, while providing different levels of invariants imposed over the generated values. However, they are often not built for composability nor extensibility, a useful feature when the shape of our random data needs to be adapted while testing different properties or sub-systems.

In this work, we develop an extensible framework for deriving compositional generators, which can be easily combined in different ways in order to fit developers’ demands using a simple type level description language. Our framework relies on familiar ideas from the à la Carte technique for writing composable interpreters in Haskell. In particular, we adapt this technique with the machinery required in the scope of random generation, showing how concepts like generation frequency or terminal constructions can also be expressed in the same type-level fashion. We provide an implementation of our ideas, and evaluate its performance using real world examples.

type-level programming

Haskell

random testing

Author

Claudio Agustin Mista

Chalmers, Computer Science and Engineering (Chalmers), Information Security

Alejandro Russo

Chalmers, Computer Science and Engineering (Chalmers), Information Security

Proceedings of the 31st Symposium on Implementation and Application of Functional Languages

31st Symposium on Implementation and Application of Functional Languages
Singapore, Singapore,

WebSec: Securing Web-driven Systems

Swedish Foundation for Strategic Research (SSF), 2018-03-01 -- 2023-02-28.

Octopi: Säker Programering för Sakernas Internet

Swedish Foundation for Strategic Research (SSF), 2018-03-01 -- 2023-02-28.

Areas of Advance

Information and Communication Technology

Subject Categories

Embedded Systems

Computer Science

Computer Systems

More information

Created

2/17/2020