javascript - React 的 Jasmine 测试给出错误并且不运行测试

Question

我刚刚开始使用 React 编码，并且制作了第一页，现在我想为其添加一个测试。我正在使用 Jasmine 和 karma 进行测试。当我尝试运行测试时，出现错误:

TypeError: this.props.data is undefined

我已经在网上搜索过，但找不到任何内容，因此非常感谢您的帮助。你可以在我的 github repo 上看到我的完整项目 github.com/mrbgit/short-stories/tree/react-tests谢谢!

我的测试文件如下所示:

var React = require('react/addons');
var Story = require('../../app/js/components/story.jsx');
var TestUtils = React.addons.TestUtils;
var testUtilsAdditions = require('react-testutils-additions');
describe('Story component', function () {
    var component;
    afterEach(function () {
        // if (component && testUtilsAdditions.isCompositeComponent(component) && component.isMounted()) {
        //   React.unmountComponentAtNode(component.getDOMNode().parent);
        // }
    });
    beforeEach(function () {
        component = TestUtils.renderIntoDocument(React.createElement(Story));
        component.props.data.storyTitle = 'front end test title';
        component.props.data.author = 'front end author';
        component.props.data.storyText = 'front end story text';
        console.log('LLLLLLLLL', component);
    });
    it('should display a story', function () {
        expect(component.props.data).toBeDefined();
        expect(component.props.data.storyTitle).toBeDefined();
        expect(component.props.data.storyTitle).toBe('front end test title');
        expect(component.props.data.author).toBe('front end author');
        expect(component.props.data.storyText).toBe('front end story text')
    });
});

Answer 1

试试这个

beforeEach(function () {
    var element = React.createElement(Story);
    element.props.data = {
        storyTitle: 'front end test title',
        author : 'front end author',
        storyText : 'front end story text'
    };
    component = TestUtils.renderIntoDocument(element);
    console.log('LLLLLLLLL', component);
});