我在功能组件中使用了"useEffect“来实现"componentWillUnmount”的功能。如何在使用Jest/Enzyme测试组件时触发它?
我的组件:
const myComp = () => {
useEffect(() => () => {
console.log('Unmounted');
}, []);
return <div>Test</div>;
}发布于 2021-05-08 10:03:11
根据这个issue,我们知道shallow render不支持useEffect钩子。我们需要手动使用mount并调用.unmount()方法。
例如。
index.tsx
import React, { useEffect } from 'react';
export const MyComp = () => {
useEffect(
() => () => {
console.log('Unmounted');
},
[]
);
return <div>Test</div>;
};index.test.tsx
import React from 'react';
import { mount } from 'enzyme';
import { MyComp } from './';
describe('67384129', () => {
it('should pass', () => {
const wrapper = mount(<MyComp />);
wrapper.unmount();
});
});测试结果:
PASS examples/67384129/index.test.tsx (8.233 s)
67384129
✓ should pass (53 ms)
console.log
Unmounted
at examples/67384129/index.tsx:6:15
Test Suites: 1 passed, 1 total
Tests: 1 passed, 1 total
Snapshots: 0 total
Time: 9.121 s包版本:
"enzyme": "^3.11.0",
"enzyme-adapter-react-16": "^1.15.5",
"react": "^16.14.0"
"jest": "^26.6.3",
"jest-environment-enzyme": "^7.1.2",
"jest-enzyme": "^7.1.2",https://stackoverflow.com/questions/67384129
复制相似问题