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[suspense][error handling] Add failing unit test #16800

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[suspense][error handling] Add failing unit test #16800

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33 changes: 33 additions & 0 deletions packages/react-reconciler/src/__tests__/ReactSuspenseWithNoopRenderer-test.internal.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1392,6 +1392,39 @@ describe('ReactSuspenseWithNoopRenderer', () => {
expect(Scheduler).toFlushExpired(['Hi']);
});
}

it('handles errors in the return path of a component that suspends', async () => {
// Covers an edge case where an error is thrown inside the complete phase
// of a component that is in the return path of a component that suspends.
// The second error should also be handled (i.e. able to be captured by
// an error boundary.
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Suggested change
// an error boundary.
// an error boundary.)

class ErrorBoundary extends React.Component {
state = {error: null};
static getDerivedStateFromError(error, errorInfo) {
return {error};
}
render() {
if (this.state.error) {
return `Caught an error: ${this.state.error.message}`;
}
return this.props.children;
}
}

ReactNoop.renderLegacySyncRoot(
<Suspense fallback="Loading...">
<ErrorBoundary>
<errorInCompletePhase>
<AsyncText ms={1000} text="Async" />
</errorInCompletePhase>
</ErrorBoundary>
</Suspense>,
);

expect(ReactNoop).toMatchRenderedOutput(
'Caught an error: Error in host config.',
);
});
});

it('does not call lifecycles of a suspended component', async () => {
Expand Down