import 'jest-preset-angular'; Object.defineProperty(window, 'CSS', { value: null }); Object.defineProperty(document, 'doctype', { value: '', }); Object.defineProperty(window, 'getComputedStyle', { value: () => { return { display: 'none', appearance: ['-webkit-appearance'], }; }, }); /** * ISSUE: https://github.com/angular/material2/issues/7101 * Workaround for JSDOM missing transform property */ Object.defineProperty(document.body.style, 'transform', { value: () => { return { enumerable: true, configurable: true, }; }, });