/// import React from 'react' import { render, fireEvent } from '@testing-library/react' import { describe, it, expect, vi } from 'vitest' import StartButton from '../../src/components/StartButton' describe('StartButton', () => { it('calls handler', () => { const fn = vi.fn() const { getByText } = render() fireEvent.click(getByText('Start')) expect(fn).toHaveBeenCalled() }) })