Assertions: Use expect() to assert the expected behavior.?

Example:

import { render, screen, fireEvent } from '@testing-library/react';

import MyComponent from './MyComponent';

test('renders the component and interacts', () => {

render(<MyComponent />);

const button = screen.getByText('Click me');

fireEvent.click(button);

expect(screen.getByText('Clicked!')).toBeInTheDocument();

});