Run Hardhat tests in --parallel mode

[ericglau]

Hardhat Upgrades plugin supports Hardhat tests in --parallel mode as of this release. When used with this Forta contracts repository, this results in a 3-4x improvement in test run time.

This requires the following npm packages and versions:

• @openzeppelin/[email protected] or later (which is a dependency of @openzeppelin/hardhat-upgrades)
• [email protected] or later

Here is an example fork of the forta-contracts repository that demonstrates this:
https://github.com/ericglau/forta-contracts/tree/parallel

Note that this fork is based on an older commit, and also that hardhat-gas-reporter does not support the --parallel flag.

However, parallel tests reduces test time from around 3 minutes to less than a minute, so this is something that could save a lot of overhead if used frequently.