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f101c2d0d3
We've heard from multiple contributors that the Reconciler forking mechanism was confusing and/or annoying to deal with. Since it's currently unused and there's no immediate plans to start using it again, this removes the forking. Fully removing the fork is split into 2 steps to preserve file history: **#25774 previous PR that did the bulk of the work:** - remove `enableNewReconciler` feature flag. - remove `unstable_isNewReconciler` export - remove eslint rules for cross fork imports - remove `*.new.js` files and update imports - merge non-suffixed files into `*.old` files where both exist (sometimes types were defined there) **This PR** - rename `*.old` files
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.