Which Enzyme adapter works with React 17?

Question

I have a React app, and I want to start writing unit tests with Enzyme. Enzyme's documentation discusses versions of React up to 16.

In src/setupTests.js I currently have

import Enzyme from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

Enzyme.configure({ adapter: new Adapter() });

But my app uses React version 17.0.1. What enzyme adapter is there for React 17?

Every

Answer 1

What enzyme adapter is there for React 17?

If you have React version 17, you can use this unofficial adapter for React 17 for enzyme.

// src/setupTests.js
import { configure } from 'enzyme';
import Adapter from '@wojtekmaj/enzyme-adapter-react-17';

configure({ adapter: new Adapter() });

See this GitHub issue for more information on the unofficial adapter.

Every

2022 and still no released adapter for React 17 – Sessoms

@Sessoms Enzyme is in a dying stage, just go for react-testing-library – Subarctic

@PouyaAtaei: Except that react-testing-library is designed to AVOID classical unit testing. It's creator writes: "Tests which [test implementation details] ultimately prevent you from modifying and refactoring the component without changing its tests." I write unit tests IN ORDER TO test implementation details. I change a component by first changing its unit tests (so that they fail) and then making the altered tests pass. That is why TDD exists. – Figone

@TomStambaugh you should not test implementation details, that's naive. You should aim to test the behaviour of your component, thus if you correctly abstracted a component and behaviour changes... you can capture it.... testing implementation details outweights the benefits that testing provides, is incredibly fragile, and may not even capture the requirements correctly.. – Subarctic

Answer 2

I tried with unofficial adapter '@wojtekmaj/enzyme-adapter-react-17' and it works fine. Thanks @super Jade.

1. clear the npm cache (clearing this may make npm slower, but give it a try).

• npm cache verify and then npm cache clean --force

2. remove your

• node_modules and package-lock.json

3. update npm dependencies in your package.json with "@testing-library/react": "^11.2.5","@wojtekmaj/enzyme-adapter-react-17": "^0.4.1","react": "^17.0.1","react-dom": "^17.0.1",
4. npm i --legacy-peer-deps
5. as @wojtekmaj/enzyme-adapter-react-17 mentioned making a change in the test file.

• import Adapter from '@wojtekmaj/enzyme-adapter-react-17';
• configure ({ adapter: new Adapter() });

Bobbie

You no longer need --legacy-peer-deps flag when installing @wojtekmaj/enzyme-adapter-react-17 as of version 0.6.0. Proceed as normal! :) – Herniotomy

what should the package.json file look like? – Methacrylate

Answer 3

add this code in setupTests.js file

// jest-dom adds custom jest matchers for asserting on DOM nodes.
// allows you to do things like:
// expect(element).toHaveTextContent(/react/i)
// learn more: https://github.com/testing-library/jest-dom
import '@testing-library/jest-dom';
import Enzyme from 'enzyme';
import Adapter from '@wojtekmaj/enzyme-adapter-react-17';

Enzyme.configure({ adapter: new Adapter() });

Terrence

Answer 4

I've tried @wojtekmaj/enzyme-adapter-react-17 for React 17, and it does work just fine.

After using npm install --save-dev @wojtekmaj/enzyme-adapter-react-17 you also need to set up enzyme to use the adapter you want it to use, you do so by adding the top level configure API:

/* src/setupTests.js */
import Enzyme from 'enzyme';
import Adapter from '@wojtekmaj/enzyme-adapter-react-17';

Enzyme.configure({ adapter: new Adapter() });

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