Jest -如果存在prop，则调用函数进行测试

npm install --save-dev jest

yarn add --dev jest

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

describe('Component', () => {
  it('should call handleClick function when prop exists', () => {
    const handleClick = jest.fn();
    const props = {
      prop: 'some value',
      handleClick: handleClick
    };

    const { getByText } = render(<Component {...props} />);
    const button = getByText('Click me');
    fireEvent.click(button);

    expect(handleClick).toHaveBeenCalled();
  });

  it('should not call handleClick function when prop does not exist', () => {
    const handleClick = jest.fn();
    const props = {
      handleClick: handleClick
    };

    const { getByText } = render(<Component {...props} />);
    const button = getByText('Click me');
    fireEvent.click(button);

    expect(handleClick).not.toHaveBeenCalled();
  });
});