create-web3/templates/hardhat/default/test/sample-test.js

A boilerplate for creating a web3 projects

const { expect } = require('chai');
const { ethers } = require('hardhat');

describe('Greeter', function () {
  it("Should return the new greeting once it's changed", async function () {
    const Greeter = await ethers.getContractFactory('Greeter');
    const greeter = await Greeter.deploy('Hello, world!');
    await greeter.deployed();

    expect(await greeter.greet()).to.equal('Hello, world!');

    const setGreetingTx = await greeter.setGreeting('Hola, mundo!');

    // wait until the transaction is mined
    await setGreetingTx.wait();

    expect(await greeter.greet()).to.equal('Hola, mundo!');
  });
});