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Chris Tate
712a82ae96
Node converts a string chunk with Buffer.from(chunk, encoding) and
returns Buffer.concat for read(n), so every byte chunk user code
receives from a non-object-mode stream is a Buffer. The runtime made
these chunks as plain Uint8Array storage. A typed write(), transform()
or 'data' callback then printed String(chunk), `${chunk}` and
chunk + "" as comma-separated bytes (97,98) instead of the text, and
read(n) and read() after unshift(string) returned non-Buffer values to
untyped code.
The chunks the stream creates now carry the Buffer brand: write() and
push() of a string (with or without an encoding), transform output given
as a string (the callback or this.push), unshift() of a string, and the
concatenation read(n) returns.
Corpus 5445 (typed callbacks, pipeline and stream/promises pipeline)
and 5446 (untyped code, Buffer.isBuffer at each boundary) check this
against Node.