How to test with openzeppelin/test-environment

I’ve been using @openzeppelin/test-environment to test upgradeable contracts.

Basic examples just show how to initialize a contract without constructor parameter or with
function initialize() without parameters.

How to test a contract where initialize function has arguments?

describe('MyContract', function () {
  it('deployer is owner', async function () {
    const myContract = await*other arguments*{ from: owner });
    expect(await myContract.owner()).to.equal(owner);
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How is MyContract upgradeable? Are you using the truffle-upgrades package?

You don’t initialize an upgradeable contract with new but with deployProxy (or by calling initialize explicitly)

// migrations/NN_deploy_upgradeable_box.js
const { deployProxy } = require('@openzeppelin/truffle-upgrades');

const Box = artifacts.require('Box');

module.exports = async function (deployer) {
  const instance = await deployProxy(Box, [42], { deployer });
  console.log('Deployed', instance.address);
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HI @dmdv,

To test upgradeable contracts we can use Upgrades Plugins for Truffle or Hardhat. The Upgrades Plugin for Truffle only works with a Truffle project that uses Truffle to compile and run tests.