Example function to render a cart's total on the screen

renderCartTotal.js

import { expect } from 'chai';
import createFixture from '../support/createFixture';

function renderCartTotal({ domNode, itemPrices }) {
  const sum = itemPrices.reduce((total, price) => total + price, 0);
  const formattedPrice = `$${sum}`;

  domNode.innerHTML = formattedPrice;
}

// Rest of the spec file here...