react-testing-library why is toBeInTheDocument() not a function

Question

Here is my code for a tooltip that toggles the CSS property display: block on MouseOver and on Mouse Out display: none.

 it(\'should sho         


        

Answer 1

When you do npm i @testing-library/react make sure there is a setupTests.js file with the following statement in it

import '@testing-library/jest-dom/extend-expect';