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stream: resume stream on drain #41848

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merged 2 commits into from Feb 6, 2022
Merged

stream: resume stream on drain #41848

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a2c5fcc
stream: resume stream on drain
ronag Feb 4, 2022
4916f0c
fixup
ronag Feb 4, 2022
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3 changes: 1 addition & 2 deletions lib/internal/streams/readable.js
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Expand Up @@ -853,8 +853,7 @@ function pipeOnDrain(src, dest) {

if ((!state.awaitDrainWriters || state.awaitDrainWriters.size === 0) &&
EE.listenerCount(src, 'data')) {
state.flowing = true;
flow(src);
src.resume();
}
};
}
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17 changes: 17 additions & 0 deletions test/parallel/test-stream-readable-pause-and-resume.js
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Expand Up @@ -56,3 +56,20 @@ function readAndPause() {
assert(readable.isPaused());
});
}

{
const { PassThrough } = require('stream');

const source3 = new PassThrough();
const target3 = new PassThrough();

const chunk = Buffer.allocUnsafe(1000);
let chunks = 1;
while (target3.write(chunk)) chunks++;

source3.pipe(target3);
target3.on('drain', common.mustCall(() => {
assert(!source3.isPaused());
}));
target3.on('data', () => {});
}