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stream: allow empty string as first stream of pipeline #38723

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stream: allow empty string as first stream of pipeline #38723

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e704e99
stream: allow empty string as source of pipeline
Ayase-252 May 18, 2021
a0fb263
fixup!: simplify test condition
Ayase-252 May 19, 2021
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2 changes: 1 addition & 1 deletion lib/internal/streams/utils.js
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ function isStream(obj) {
}

function isIterable(obj, isAsync) {
if (!obj) return false;
if (!obj && typeof obj !== 'string') return false;
if (isAsync === true) return typeof obj[SymbolAsyncIterator] === 'function';
if (isAsync === false) return typeof obj[SymbolIterator] === 'function';
return typeof obj[SymbolAsyncIterator] === 'function' ||
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18 changes: 18 additions & 0 deletions test/parallel/test-stream-pipeline-with-empty-string.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
'use strict';

const common = require('../common');
const {
pipeline,
PassThrough
} = require('stream');


async function runTest() {
await pipeline(
'',
new PassThrough({ objectMode: true }),
common.mustCall(() => { })
);
}

runTest().then(common.mustCall(() => {}));