React 测试库 fireEvent.click 不起作用

我基本上只是想改变一个计数器并显示该值已经改变。我正在这样做getByTestId那么这可能是问题所在？

这是我的组件：

import React, { useState } from 'react';
import logo from './logo.svg';
import './App.css';

function App() {
    const [count, setCounter] = useState(0)
  return (
    <div className="App">
      <header className="App-header">
        <img src={logo} className="App-logo" alt="logo" />
                div
                <div
                    onClick={() => setCounter(prevCount => prevCount + 1)}
                    data-testid="addCount"
                >
                    +
                </div>
        <div data-testid="count">
          {count}
        </div>
                <div
                    onClick={() => setCounter(prevCount => prevCount - 1)}
                    data-testid="minusCount"
                >
                    -
                </div>
        <a
          className="App-link"
          href="https://reactjs.org"
          target="_blank"
          rel="noopener noreferrer"
        >
          Learn React
        </a>
      </header>
    </div>
  );
}

export default App;

这是我试图运行的测试：

describe('State is managed correctly', () => {
    const { getByTestId } = render(<App />)
    const add = getByTestId(`addCount`)
    const count = getByTestId(`count`)

    it('count starts at 0', () => {
        expect(count).toHaveTextContent("0")
    })


 it('count added, value should be 1', () => {
        fireEvent.click(add)
        expect(count).toHaveTextContent("1") // error count is still 0
    })
})

看起来你不能像我希望的那样真正“管理”反应测试库中的状态。从阅读文档来看，您也不应该这样做。

这是我的解决方案：

import React from 'react'
import { render, fireEvent, cleanup } from '@testing-library/react'

import App from '../src/App'

afterEach(cleanup)

describe('App component loads correctly', () => {
    const { container } = render(<App />)
    const { firstChild } = container
    test('renders correctly', () => {
        expect(container).toHaveTextContent(`Learn React`)
    })

    test('first child should contain class "App"', () => {
        expect(firstChild).toHaveClass(`App`)
    })
})

describe('State is managed correctly', () => {
    it('count starts at 0', () => {
        const { getByTestId } = render(<App />)
        const count = getByTestId(`count`)

        expect(count.innerHTML).toBe("0")
    })


 it('should add 1 to count', () => {
        const { getByTestId } = render(<App />)
        const count = getByTestId(`count`)
        const add = getByTestId(`addCount`)

        fireEvent.click(add)
        expect(count.innerHTML).toBe("1")
    })

    it('should minus 1 from count', () => {
        const { getByTestId } = render(<App />)
        const count = getByTestId(`count`)
        const minus = getByTestId(`minusCount`)

        fireEvent.click(minus)
        expect(count.innerHTML).toBe("-1")
    })
})