React与cucumberjs的集成

Question

我正在做一个React-Nextjs项目，并试图集成BDD工具cucumber进行规范和功能级测试。虽然我在使用enzyme进行浅层渲染组件时遇到了一些cucumber和React的集成问题：

下面是我收到的错误：const wrapper = shallow(<Referrer/>);上的TypeError: Cannot read property 'contextTypes' of undefined

cucumber步骤测试文件代码：

import React from 'react';
import { defineSupportCode } from "cucumber";
import { shallow } from "enzyme";
import {Referrer} from "./../../components/Referrer";

defineSupportCode(({ Given, When, Then }) => {
    Given("I want to do something", function (callback) {
        // Write code here that turns the phrase above into concrete actions
        callback();
    });

    When("Xyz link is clicked", function (callback) {
        const wrapper = shallow(<Referrer/>);
        ... // Write code here that turns the phrase above into concrete actions
    });

    Then("Appropriate action happens", function (callback) {
        // Write code here that turns the phrase above into concrete actions
        callback();
    });
});

这个组件是一个简单的UI组件，非常简单，下面是它的结构：

import React from "react"; // eslint-disable-line no-unused-vars

export default class Referrer extends React.Component {
    render () {
        return (
            <div className="some-class" id="some-id">
              // html tags
              <style jsx>{`
                .some-class {
                  //styling
                }

                .some-class2 {
                  //styling
                }
              `}
              </style>
            </div>
        );
    }
}

我正在使用"cucumber": "^2.3.1"，"enzyme": "^2.6.0"，我不确定如何解决这个问题，到目前为止在网上没有帮助，我已经试着调试了几个小时，但没有运气。

确切的错误片段：

Warning: React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in.

const wrapper = shallow(<Referrer/>);上的TypeError: Cannot read property 'contextTypes' of undefined

Answer 1

我意识到问题出在哪里，我的Referrer组件被默认导出，尽管我没有正确地导入它。我不得不将其导入为import Referrer from "./../../components/Referrer";而不是import {Referrer} from "./../../components/Referrer";