/** * @license Copyright (c) 2003-2016, CKSource - Frederico Knabben. All rights reserved. * For licensing, see LICENSE.md. */ 'use strict'; /** * Creates a spy function (ala Sinon.js) that can be used to inspect call to it. * * The following are the present features: * * * spy.called: property set to `true` if the function has been called at least once. * * @memberOf utils * @returns {Function} The spy function. */ export default function spy() { return function spy() { spy.called = true; }; }