import { appendFrame, createDetachedDocument, createElement } from './assets/helpers'; import inDOM from '../inDOM'; describe('"inDOM"', () => { describe('Returns `true` for DOM elements found in the DOM tree', () => { function suite(doc: Document) { it(' element', () => { expect(inDOM(doc.documentElement)).toBe(true); }); it(' element', () => { expect(inDOM(doc.body)).toBe(true); }); it('Any HTML element', () => { const p = doc.createElement('p'); p.style.cssText = ` width: 0; height: 0; position: absolute; margin: 0; padding: 0; opacity: 0; overflow: hidden; `; doc.body.appendChild(p); expect(inDOM(p)).toBe(true); doc.body.removeChild(p); }); } describe('In the current document', () => { suite(document); }); describe('In a Frame document', () => { const frame = appendFrame(); suite(frame.contentDocument as Document); frame.remove(); }); describe('A DOM Node in a detached Document', () => { suite(createDetachedDocument()); }); }); describe('Returns `false` for DOM elements not in the DOM tree', () => { it('Document', () => { expect(inDOM(document)).toBe(false); }); it('HTML element not appended to the DOM', () => { expect(inDOM(createElement('p'))).toBe(false); }); }); });