dillon1000/react

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[test] Add coverage for multi-byte code units in stream APIs (#36900)

Adds a test documenting why a `string.length`
fast path is unsound.

`byteSize` feeds heuristic decisions (outlining threshold at 500 bytes,
progressive chunk sizing). `string.length` undercounts multi-byte
content, so a boundary that is really >500 bytes could drop below the
outlining threshold.

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Co-authored-by: Claude Opus 4.7 <[email protected]>
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Sebastian "Sebbie" Silbermann authored cb71f2e2610ada0b9974a936d81c22f339167de3 Parent 6befd1a
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M packages/react-dom/src/__tests__/ReactDOMFizzServer-test.js ModifiedM packages/react-server-dom-webpack/src/__tests__/ReactFlightDOMNode-test.js Modified
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