Simple Mocha Unit Test

calculatorUtil.spec.js

'use strict';

const expect = require('chai').expect;
const CalculatorUtil = require('./CalculatorUtil');

describe('Calculator Util', () => {
  let calculatorUtil;

  beforeEach(() => {
    calculatorUtil = new CalculatorUtil();
  });

  it('should round to two decimals', () => {
    expect(calculatorUtil.roundToTwoDecimals(64.999)).to.equal(65.00);
    expect(calculatorUtil.roundToTwoDecimals(271.60123)).to.equal(271.60);
    expect(calculatorUtil.roundToTwoDecimals(622.8475)).to.equal(622.85);
  });
});