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| Current File : //proc/self/root/proc/self/root/home/ubuntu/node-v16.18.1/test/parallel/test-stream-backpressure.js |
'use strict';
const common = require('../common');
const assert = require('assert');
const stream = require('stream');
let pushes = 0;
const total = 65500 + 40 * 1024;
const rs = new stream.Readable({
read: common.mustCall(function() {
if (pushes++ === 10) {
this.push(null);
return;
}
const length = this._readableState.length;
// We are at most doing two full runs of _reads
// before stopping, because Readable is greedy
// to keep its buffer full
assert(length <= total);
this.push(Buffer.alloc(65500));
for (let i = 0; i < 40; i++) {
this.push(Buffer.alloc(1024));
}
// We will be over highWaterMark at this point
// but a new call to _read is scheduled anyway.
}, 11)
});
const ws = stream.Writable({
write: common.mustCall(function(data, enc, cb) {
setImmediate(cb);
}, 41 * 10)
});
rs.pipe(ws);
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