从jest测试访问useState值

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

test('test useState value', () => {
  const TestComponent = () => {
    const [count, setCount] = useState(0);

    const increment = () => {
      setCount(count + 1);
    };

    return (
      <div>
        <p>Count: {count}</p>
        <button onClick={increment}>Increment</button>
      </div>
    );
  };

  const { getByText, getByText } = render(<TestComponent />);

  // 初始状态为0
  expect(getByText('Count: 0')).toBeInTheDocument();

  // 模拟点击按钮
  fireEvent.click(getByText('Increment'));

  // 状态更新为1
  expect(getByText('Count: 1')).toBeInTheDocument();
});