我得到

  

TypeError：Enzyme :: Selector需要一个字符串，对象或组件   当我尝试测试组件时的构造函数

我尝试使用ReactWrapper，使用div的类并创建一个ID。没事。

import React from "react";
import Dashboard from "../Containers/Dashboard/Dashboard";
import { BrowserRouter as Router } from 'react-router-dom'
import { configure,shallow,mount } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';
import Container from 'react-bootstrap';
let container = null;
configure({adapter: new Adapter()});

describe('<Dashboard />',() => {
  let wrapper;

  beforeEach(() => {
    const fakeTopic = [
      {
        "name": "javascript","display_name": "JavaScript","short_description": "JavaScript (JS) is a lightweight interpreted programming language with first-class functions.","description": "JavaScript (JS) is a lightweight interpreted or JIT-compiled programming language with first-class functions. While it is most well-known as the scripting language for Web pages,many non-browser environments also use it,such as Node.js,Apache CouchDB and Adobe Acrobat. JavaScript is a prototype-based,multi-paradigm,dynamic language,supporting object-oriented,imperative,and declarative (e.g. functional programming) styles.","created_by": "Brendan Eich","released": "December 4,1995","created_at": "2016-11-28T18:41:00Z","updated_at": "2019-11-06T15:05:24Z","featured": true,"curated": true,"score": 7954.724
      }
    ]
      wrapper = shallow(<Router><Dashboard jsTrendingTopics={fakeTopic} ><Container></Container></Dashboard></Router>);
  });

  it('should render <Container /> when recieving topics',() => {

      expect(wrapper.find(Container)).toBeTruthy();
  });
});

这是我要测试的组件：

    return (
        <Container id="container1">
            {props.jsTrendingTopics.length > 0 &&
                <CardDeck>
                    <Row>
                        {props.jsTrendingTopics.map((jsTrendingTopic,index) =>
                            <Col md="auto" classname="margin-top margin-left" key={index}>
                                <Card  style={{ width: '18rem' }}>
                                    <Card.Img variant="top" src={require(`../../assets/${jsTrendingTopic.name}.png`)} />
                                    <Card.Body>
                                        <Card.Title>{jsTrendingTopic.display_name}</Card.Title>
                                        <Link to={`/language/${jsTrendingTopic.name}`}>
                                            <Button variant="primary">Details</Button>
                                        </Link>
                                    </Card.Body>
                                </Card>
                            </Col>
                        )}
                    </Row>
                </CardDeck>
            }

        </Container>
    )
}

我希望找到该组件或只是查看它是否存在。至少有东西。