// @ts-ignore global.CSS = null; const webStorageMock = () => { let storage: Record = {}; return { getItem: (key: string) => (key in storage ? storage[key] : null), setItem: (key: string, value: any) => (storage[key] = value || ''), removeItem: (key: string) => delete storage[key], clear: () => (storage = {}), }; }; Object.defineProperty(window, 'localStorage', { value: webStorageMock() }); Object.defineProperty(window, 'sessionStorage', { value: webStorageMock() }); 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, }; }, });