openzeppelin-contracts/test/token/ERC20/extensions/ERC20Capped.test.js

const { ether } = require('@openzeppelin/test-helpers');
const { shouldBehaveLikeERC20Capped } = require('./ERC20Capped.behavior');
const { expectRevertCustomError } = require('../../../helpers/customError');

const ERC20Capped = artifacts.require('$ERC20Capped');

contract('ERC20Capped', function (accounts) {
  const cap = ether('1000');

  const name = 'My Token';
  const symbol = 'MTKN';

  it('requires a non-zero cap', async function () {
    await expectRevertCustomError(ERC20Capped.new(name, symbol, 0), 'ERC20InvalidCap', [0]);
  });

  context('once deployed', async function () {
    beforeEach(async function () {
      this.token = await ERC20Capped.new(name, symbol, cap);
    });

    shouldBehaveLikeERC20Capped(accounts, cap);
  });
});