Question

对App.js进行更改时，我的测试不会失败。

我正在使用玩笑，酶，react.js，react-create-app和react-scripts。

在更新App.js组件时，我期望测试会失败，因为它与App.js的快照不匹配。我认为这与我的_快照_ / App.test.js文件有关...如何解决此问题？有什么想法吗？

这是我的代码：

src / components / App.js：

import React, { Component } from 'react';

class App extends Component {
  render() {
    return (
      <div>
        <h2>Gift Giver</h2>
      </div>
    );
  }
}
export default App;

src / components / App.test.js：

import React from 'react';
import { shallow } from 'enzyme';
import App from './App';

const app = shallow(<App />);

it('renders correctly', () => {
  expect(app).toMatchSnapshot();
});

src / components / __快照__ / App.test.js.snap


exports[`renders correctly 1`] = `ShallowWrapper {}`;

package.json：

{
  "name": "giftgiver",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "enzyme": "^3.10.0",
    "react": "^16.8.6",
    "react-bootstrap": "^1.0.0-beta.9",
    "react-dom": "^16.8.6",
    "react-scripts": "3.0.1",
    "react-test-render": "^1.1.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  },
  "devDependencies": {
    "enzyme-adapter-react-16": "^1.14.0"
  }
}

在更新App.js组件时，我期望测试会失败，因为它与App.js的快照不匹配

Answer 1

渲染快照时必须使用.debug()。

import React from 'react';
import { shallow } from 'enzyme';
import App from './App';

const app = shallow(<App />);

it('renders correctly', () => {
  expect(app.debug()).to.matchSnapshot();
});

顺便说一句，通常最好使用mount而不是shallow，除非有很好的理由不这样做。

更改React组件更改时，单元测试不会失败

1 个答案: