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