openzeppelin-contracts/test/account/Account.test.js

const { ethers, entrypoint } = require('hardhat');
const { loadFixture } = require('@nomicfoundation/hardhat-network-helpers');

const { getDomain } = require('../helpers/eip712');
const { ERC4337Helper } = require('../helpers/erc4337');
const { PackedUserOperation } = require('../helpers/eip712-types');
const { NonNativeSigner } = require('../helpers/signers');

const { shouldBehaveLikeAccountCore, shouldBehaveLikeAccountHolder } = require('./Account.behavior');
const { shouldBehaveLikeERC1271 } = require('../utils/cryptography/ERC1271.behavior');
const { shouldBehaveLikeERC7821 } = require('./extensions/ERC7821.behavior');

async function fixture() {
  // EOAs and environment
  const [beneficiary, other] = await ethers.getSigners();
  const target = await ethers.deployContract('CallReceiverMock');

  // ERC-4337 signer
  const signer = new NonNativeSigner({ sign: hash => ({ serialized: hash }) });

  // ERC-4337 account
  const helper = new ERC4337Helper();
  const mock = await helper.newAccount('$AccountMock', ['Account', '1']);

  // ERC-4337 Entrypoint domain
  const entrypointDomain = await getDomain(entrypoint.v08);

  // domain cannot be fetched using getDomain(mock) before the mock is deployed
  const domain = { name: 'Account', version: '1', chainId: entrypointDomain.chainId, verifyingContract: mock.address };

  const signUserOp = async userOp =>
    signer
      .signTypedData(entrypointDomain, { PackedUserOperation }, userOp.packed)
      .then(signature => Object.assign(userOp, { signature }));

  return { helper, mock, domain, signer, target, beneficiary, other, signUserOp };
}

describe('Account', function () {
  beforeEach(async function () {
    Object.assign(this, await loadFixture(fixture));
  });

  shouldBehaveLikeAccountCore();
  shouldBehaveLikeAccountHolder();
  shouldBehaveLikeERC1271({ erc7739: true });
  shouldBehaveLikeERC7821();
});