stream: fix readable stream as async iterator function

Since v19.2 it's not possible to use readableStreams
as async iterators (confirmed bug).
This patch fixes the problem by reading the Stream.Duplex property
from 'streams/duplex' instead of 'streams/legacy' module

Fixes: https://github.com/nodejs/node/issues/46141
PR-URL: https://github.com/nodejs/node/pull/46147
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
This commit is contained in:
Erick Wendel
2023-01-20 09:37:52 -03:00
committed by GitHub
parent babe6d7c84
commit 5d0946ad0e
2 changed files with 29 additions and 0 deletions

View File

@@ -13,6 +13,8 @@ const {
const { pipelineImpl: pl } = require('internal/streams/pipeline');
const { finished } = require('internal/streams/end-of-stream');
require('stream');
function pipeline(...streams) {
return new Promise((resolve, reject) => {
let signal;

View File

@@ -0,0 +1,27 @@
/* eslint-disable node-core/require-common-first, require-yield */
'use strict';
const { pipeline } = require('node:stream/promises');
{
// Ensure that async iterators can act as readable and writable streams
async function* myCustomReadable() {
yield 'Hello';
yield 'World';
}
const messages = [];
async function* myCustomWritable(stream) {
for await (const chunk of stream) {
messages.push(chunk);
}
}
(async () => {
await pipeline(
myCustomReadable,
myCustomWritable,
);
// Importing here to avoid initializing streams
require('assert').deepStrictEqual(messages, ['Hello', 'World']);
})()
.then(require('../common').mustCall());
}