问使用MART()的酶测试无法获得反应模态对话框的内容

import React from 'react'
import { Modal } from 'reactstrap'

export default class MyModal extends React.Component {

    render() {
        return (
            <div className="outside"> Some elements outside of the dialog </div>
            <Modal isOpen={this.props.modalOpen}>
                <div className="inside"> Content of dialog </div>
            </Modal>
         );
    } 
}

import React from 'react'
import MyModal  from './MyModal'
import { mount } from 'enzyme'

it('renders correctly', () => {
    const wrapper = mount( <MyModal modalOpen/> );

    expect(wrapper).toMatchSnapshot();

    // Passes
    expect(wrapper.find('.outside')).toHaveLength(1);

    // Fails, 0 length
    expect(wrapper.find('.inside')).toHaveLength(1);
});