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profilingCommitTreeBuilder-test.js
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profilingCommitTreeBuilder-test.js
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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow
*/
import typeof TestRendererType from 'react-test-renderer';
import type Store from 'react-devtools-shared/src/devtools/store';
describe('commit tree', () => {
let React;
let ReactDOM;
let Scheduler;
let TestRenderer: TestRendererType;
let store: Store;
let utils;
beforeEach(() => {
utils = require('./utils');
utils.beforeEachProfiling();
store = global.store;
store.collapseNodesByDefault = false;
store.recordChangeDescriptions = true;
React = require('react');
ReactDOM = require('react-dom');
Scheduler = require('scheduler');
TestRenderer = utils.requireTestRenderer();
});
it('should be able to rebuild the store tree for each commit', () => {
const Parent = ({count}) => {
Scheduler.unstable_advanceTime(10);
return new Array(count)
.fill(true)
.map((_, index) => <Child key={index} />);
};
const Child = React.memo(function Child() {
Scheduler.unstable_advanceTime(2);
return null;
});
const container = document.createElement('div');
utils.act(() => store.profilerStore.startProfiling());
utils.act(() => ReactDOM.render(<Parent count={1} />, container));
utils.act(() => ReactDOM.render(<Parent count={3} />, container));
utils.act(() => ReactDOM.render(<Parent count={2} />, container));
utils.act(() => ReactDOM.render(<Parent count={0} />, container));
utils.act(() => store.profilerStore.stopProfiling());
let renderFinished = false;
function Validator({commitIndex, rootID}) {
const commitTree = store.profilerStore.profilingCache.getCommitTree({
commitIndex,
rootID,
});
expect(commitTree).toMatchSnapshot(`${commitIndex}: CommitTree`);
renderFinished = true;
return null;
}
const rootID = store.roots[0];
for (let commitIndex = 0; commitIndex < 4; commitIndex++) {
renderFinished = false;
utils.act(() => {
TestRenderer.create(
<Validator commitIndex={commitIndex} rootID={rootID} />,
);
});
expect(renderFinished).toBe(true);
}
});
});