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ReactErrorBoundariesHooks-test.internal.js
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ReactErrorBoundariesHooks-test.internal.js
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/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @emails react-core
*/
'use strict';
let React;
let ReactDOM;
describe('ReactErrorBoundariesHooks', () => {
beforeEach(() => {
jest.resetModules();
ReactDOM = require('react-dom');
React = require('react');
});
it('should preserve hook order if errors are caught', () => {
function ErrorThrower() {
React.useMemo(() => undefined, []);
throw new Error('expected');
}
function StatefulComponent() {
React.useState(null);
return ' | stateful';
}
class ErrorHandler extends React.Component {
state = {error: null};
componentDidCatch(error) {
return this.setState({error});
}
render() {
if (this.state.error !== null) {
return <p>Handled error: {this.state.error.message}</p>;
}
return this.props.children;
}
}
function App(props) {
return (
<React.Fragment>
<ErrorHandler>
<ErrorThrower />
</ErrorHandler>
<StatefulComponent />
</React.Fragment>
);
}
const container = document.createElement('div');
ReactDOM.render(<App />, container);
expect(() => {
ReactDOM.render(<App />, container);
}).not.toThrow();
});
});