OpenMediaCenter/src/elements/Tag.test.js

import React from "react";
import ReactDom from 'react-dom'
import Tag from './Tag'

import {render} from '@testing-library/react'
import "@testing-library/jest-dom"

describe('<Tag/>', function () {
    it('renders without crashing ', function () {
        const div = document.createElement("div");
        ReactDom.render(<Tag/>,div);
        ReactDom.unmountComponentAtNode(div);
    });

    it('renders childs correctly', function () {
        const {getByTestId} = render(<Tag>test</Tag>);
        expect(getByTestId("Test-Tag")).toHaveTextContent("test");
    });
});