memoryRouter依赖者的Jest酶setState

// MyComponent.js
import React, { useState } from 'react';
import { MemoryRouter, Route, Link } from 'react-router-dom';

const MyComponent = () => {
  const [count, setCount] = useState(0);

  return (
    <MemoryRouter>
      <div>
        <p>Count: {count}</p>
        <button onClick={() => setCount(count + 1)}>Increment</button>
        <Route path="/" exact render={() => <Link to="/about">About</Link>} />
        <Route path="/about" render={() => <div>About Page</div>} />
      </div>
    </MemoryRouter>
  );
};

export default MyComponent;

// MyComponent.test.js
import React from 'react';
import { render, fireEvent } from '@testing-library/react';
import MyComponent from './MyComponent';

describe('MyComponent', () => {
  it('should increment count when button is clicked', () => {
    const { getByText } = render(<MyComponent />);
    const button = getByText('Increment');

    // Spy on the setState method
    const setStateSpy = jest.spyOn(MyComponent.prototype, 'setState', 'mock');

    fireEvent.click(button);

    expect(setStateSpy).toHaveBeenCalledWith({ count: 1 });
    expect(getByText('Count: 1')).toBeInTheDocument();
  });
});