Forc could have an integrated mutation-testing tool.

[nfurfaro]

I propose adding mutation-testing capabilities to Forc.

There are a number of tools available now for mutation testing solidity, but the only one I’ve used personally is Vertigo.
For anyone not familiar, mutation testing is essentially a way of testing the quality of your tests themselves, which is a very helpful thing to check. It is very possible to have excellent test coverage, while also having poor-quality tests.

Background:

https://medium.com/swlh/introduction-into-mutation-testing-d6512dc702b0

Here's an open issue for mutation testing in the foundry repo with some great discussion around implementation details: foundry-rs/foundry#478

Other tools (solidity-specific):

• https://github.com/JoranHonig/vertigo
• https://ieeexplore.ieee.org/document/8946219
• https://www.sciencedirect.com/science/article/pii/S1877050920323826
• https://arxiv.org/abs/2105.03626

Optionally, if Forc were made to support plugins, this could be added later by anybody, maybe even one of the authors of existing tools for Solidity.