Consolidate testing libraries across the monorepo

[ctrlc03]

Currently we are using different testing libraries across the project. Given that the circuits use mocha (circom_tester) and hardhat for the contracts test use mocha too, it seems wise to stop using jest across all other TS packages in favour of Mocha. The changes will be minimum.

• remove jest @types/jest
• install mocha ts-mocha @types/mocha chai @types/chai
• fix all tests
• change test scripts
• bonus: run all tests in one command from the root of the monorepo

This would also help with some issues arising when running typedoc on the repo

[samajammin]

Love it! I suspect this will solve some Jest <> Mocha interface clashing issues I've been facing in this branch: #755 (comment)

My (naive) preference would have been to use Jest over Mocha, given it seems to be overall more popular & better maintained, but if Mocha & Hardhat use Mocha, that sounds like a great reason to just roll with that!

[ctrlc03]

Love it! I suspect this will solve some Jest <> Mocha interface clashing issues I've been facing in this branch: #755 (comment)

My (naive) preference would have been to use Jest over Mocha, given it seems to be overall more popular & better maintained, but if Mocha & Hardhat use Mocha, that sounds like a great reason to just roll with that!

Yea I see the point of using Jest, we can always switch back and solve the issues between mocha<>jest in case mocha is missing some features that we will need in the future. So far it seems like we can run everything as we did befre with ts-mocha 🙂

[samajammin]

Fixed by #819