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Jack Pope
66c8346401
## Summary Moving towards deprecation of ReactTestRenderer. Log a warning on each render so we can remove the exports in a future major version. We can enable this flag in web RTR without disrupting RN tests by flipping the flag in `packages/shared/forks/ReactFeatureFlags.test-renderer.js` ## How did you test this change? `yarn test packages/react-test-renderer/src/__tests__/ReactTestRenderer-test.js`
react-test-renderer
This package provides an experimental React renderer that can be used to render React components to pure JavaScript objects, without depending on the DOM or a native mobile environment.
Essentially, this package makes it easy to grab a snapshot of the "DOM tree" rendered by a React DOM or React Native component without using a browser or jsdom.
Documentation:
https://reactjs.org/docs/test-renderer.html
Usage:
const ReactTestRenderer = require('react-test-renderer');
const renderer = ReactTestRenderer.create(
<Link page="https://www.facebook.com/">Facebook</Link>
);
console.log(renderer.toJSON());
// { type: 'a',
// props: { href: 'https://www.facebook.com/' },
// children: [ 'Facebook' ] }
You can also use Jest's snapshot testing feature to automatically save a copy of the JSON tree to a file and check in your tests that it hasn't changed: https://jestjs.io/blog/2016/07/27/jest-14.html.