Jest - sgml/signature GitHub Wiki HTML: "data-testid" JavaScript: getbytestid References https://www.oreilly.com/library/view/modern-javascript-web/9781788992749/d1156d68-369f-4461-b3ad-b8fe4cecd9c7.xhtml https://jestjs.io/docs/configuration https://www.npmjs.com/package/jest-json