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[Flight] Gated test for dropped transport of undefined object values #26478

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Merged
eps1lon merged 2 commits into from
Mar 29, 2023
Merged

[Flight] Gated test for dropped transport of undefined object values #26478

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b447234
[Flight] Failing test for dropped transport of undefined object values
eps1lon Mar 25, 2023
67c618f
[Flight] Add gated test for desired behavior for undefined props
eps1lon Mar 25, 2023
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34 changes: 34 additions & 0 deletions packages/react-client/src/__tests__/ReactFlight-test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -213,6 +213,40 @@ describe('ReactFlight', () => {
expect(ReactNoop).toMatchRenderedOutput(null);
});

// @gate FIXME
it('should transport undefined object values', async () => {
function ServerComponent(props) {
return 'prop' in props
? `\`prop\` in props as '${props.prop}'`
: '`prop` not in props';
}
const ClientComponent = clientReference(ServerComponent);

const model = (
<>
<div>
Server: <ServerComponent prop={undefined} />
</div>
<div>
Client: <ClientComponent prop={undefined} />
</div>
</>
);

const transport = ReactNoopFlightServer.render(model);

await act(async () => {
ReactNoop.render(await ReactNoopFlightClient.read(transport));
});

expect(ReactNoop).toMatchRenderedOutput(
<>
<div>Server: `prop` in props as 'undefined'</div>
<div>Client: `prop` in props as 'undefined'</div>
</>,
);
});

it('can render an empty fragment', async () => {
function Empty() {
return <React.Fragment />;
Expand Down