Eth contract testing: Openzeppelin: Send multiple transactions simultaneously

[ychiaoli18]

CI fails while testing Openzeppelin contracts

Link to CircleCI result

Reproduce Steps

Follow the README to set up the environment

cd ./extern/openzeppelin-contracts
npx hardhat --network test test

[Stebalien]

Looks like a dup of #1615?

[ychiaoli18]

They are different. The root cause of this issue is that the code sends out multiple transactions simultaneously, so they all share the same nonce.

test/governance/extensions/GovernorERC721.test.js:

await Promise.all([NFT0, NFT1, NFT2, NFT3, NFT4].map(tokenId => this.token.$_mint(owner, tokenId)))

[Stebalien]

Oh, I see. I think:

1. The first message fails with out of gas, but lands in the mpool.
2. Subsequent messages fail because the first message is in the mpool.