import { appendFrame, createDetachedDocument } from './assets/helpers'; import isWindow from '../isWindow'; describe('"isWindow"', () => { describe('Returns `true` for:', () => { it('The Window', () => { expect(isWindow(window)).toBe(true); }); it('The Window of a Frame', () => { const frame = appendFrame(); expect(isWindow(frame.contentWindow)).toBe(true); frame.remove(); }); }); describe('Returns `false` for:', () => { it('A Frame element', () => { const frame = appendFrame(); expect(isWindow(frame)).toBe(false); frame.remove(); }); it('The `defaultView` of a detached document', () => { const doc = createDetachedDocument(); expect(isWindow(doc.defaultView)).toBe(false); }); it.each([ ['Document', document], [' element', document.documentElement], [' element', document.body], ['NULL', null], ['Object', {}] ])('A non window element: %s', (_, elm) => { expect(isWindow(elm)).toBe(false); }); }); });