admin管理员组文章数量:1334342
I'm trying to run a test for the React ponent. I need to check how it looks like after rendering. Tried to use ReactDOMServer.renderToString()
but it fails. Here is the code:
import { NewRec } from '../src/ponents/edit';
import { shallow } from 'enzyme';
import React from 'react/lib/ReactWithAddons';
import ReactDOMServer from 'react-dom/server';
jest.mock('react-dom');
jest.mock('react/lib/ReactDefaultInjection');
describe('NewRec ponent', () => {
const ponent = shallow(<NewRec />);
it('returns true if blah blah', ()=>{
var htmlstring = ReactDOMServer.renderToString(<ponent />);
});
});
I'm getting the following error:
Invariant Violation: There is no registered ponent for the tag ponent
I tried to call it like: var htmlstring = ReactDOMServer.renderToString(ponent);
then I get this error:
Invariant Violation: renderToString(): You must pass a valid ReactElement.
Does anyone knows where the problem is?
I'm trying to run a test for the React ponent. I need to check how it looks like after rendering. Tried to use ReactDOMServer.renderToString()
but it fails. Here is the code:
import { NewRec } from '../src/ponents/edit';
import { shallow } from 'enzyme';
import React from 'react/lib/ReactWithAddons';
import ReactDOMServer from 'react-dom/server';
jest.mock('react-dom');
jest.mock('react/lib/ReactDefaultInjection');
describe('NewRec ponent', () => {
const ponent = shallow(<NewRec />);
it('returns true if blah blah', ()=>{
var htmlstring = ReactDOMServer.renderToString(<ponent />);
});
});
I'm getting the following error:
Invariant Violation: There is no registered ponent for the tag ponent
I tried to call it like: var htmlstring = ReactDOMServer.renderToString(ponent);
then I get this error:
Invariant Violation: renderToString(): You must pass a valid ReactElement.
Does anyone knows where the problem is?
Share Improve this question edited Nov 9, 2016 at 22:09 Andreas Köberle 111k58 gold badges280 silver badges307 bronze badges asked Nov 9, 2016 at 10:01 BirishBirish 5,8327 gold badges36 silver badges56 bronze badges2 Answers
Reset to default 2There is the snapshot feature in Jest where it stores the rendered tree as a file. Note that you have to install enzyme-to-json as well to convert the enzyme rendered ponent to something the snapshot method can understand.
import { NewRec } from '../src/ponents/edit';
import { shallow } from 'enzyme';
import { shallowToJson } from 'enzyme-to-json';
describe('NewRec ponent', () = > {
it('returns true if blah blah', () = > {
const ponent = shallow(<NewRec />);
expect(shallowToJson(ponent)).toMatchSnapshot();
});
});
This will create a new file in __snapshot__
folder in your test folder, where you can inspect the rendered result. Every time you rerun the test, the ponent will be tested against the snapshot.
If you don't use enzyme, you can use Facebook's react-test-renderer
too, it's even simpler:
import React from "react";
import renderer from "react-test-renderer";
test("Test 1", () => {
const ponent = renderer.create(
<TestItem />
);
let tree = ponent.toJSON();
expect(tree).toMatchSnapshot();
});
版权声明:本文标题:javascript - How to see what the rendered React component looks like in the Jest unit test? - Stack Overflow 内容由网友自发贡献,该文观点仅代表作者本人, 转载请联系作者并注明出处:http://www.betaflare.com/web/1742267857a2443747.html, 本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容,一经查实,本站将立刻删除。
发表评论