与 Cucumberjs 的 React 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。尽管在使用 enzyme 浅表渲染组件时，我在将cucumber与 React 集成时遇到了一些问题：

这是我得到的错误： TypeError: Cannot read property 'contextTypes' of undefined const wrapper = shallow(<Referrer/>);

黄瓜步骤测试文件的代码：

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();
    });
});

该组件是一个简单的UI组件，非常简单，这是它的结构：

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，到目前为止在线没有任何帮助，我一直在尝试调试过去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.

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

Answer 1

我意识到出了什么问题，我的Referrer组件被默认导出，尽管我没有正确导入它。我必须将其作为import Referrer from "./../../components/Referrer";而不是import {Referrer} from "./../../components/Referrer";导入