import { appendFrame, createDetachedDocument, createElement } from './assets/helpers'; import isDOMRoot from '../isDOMRoot'; describe('"isDOMRoot"', () => { describe('Returns `true` for the `documentElement`', () => { const test = (doc: Document) => expect(isDOMRoot(doc.documentElement)).toBe(true); it('In the current document', () => { test(document); }); it('In a Frame', () => { const frame = appendFrame(); test((frame.contentDocument as Document)); frame.remove(); }); it('A DOM Node in a detached Document', () => { test(createDetachedDocument()); }); }); describe('Returns `false` for values that are not `documentElement`:', () => { it.each([ ['Window', window], ['Document', document], [' element', document.body], ['

element', createElement('p')], ['Text Node', document.createTextNode('')], ['Comment Node', document.createComment('')], ['Document Fragment', document.createDocumentFragment()], ['NULL', null], ['Object', {}], ['Fake Element', { parentNode: { nodeType: 9 } }] ])('%s', (_, val) => { expect(isDOMRoot(val)).toBe(false); }); }); });