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// deno-fmt-ignore-file// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 18.12.0// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
'use strict';const common = require('../common');const fixtures = require('../common/fixtures');const assert = require('assert');const fs = require('fs');
// Test that concurrent file read streams don’t interfere with each other’s// contents, and that the chunks generated by the reads only retain a// 'reasonable' amount of memory.
// Refs: https://github.com/nodejs/node/issues/21967
const filename = fixtures.path('loop.js');  // Some small non-homogeneous file.const content = fs.readFileSync(filename);
const N = 2000;let started = 0;let done = 0;
const arrayBuffers = new Set();
function startRead() {  ++started;  const chunks = [];  fs.createReadStream(filename)    .on('data', (chunk) => {      chunks.push(chunk);      arrayBuffers.add(chunk.buffer);    })    .on('end', common.mustCall(() => {      if (started < N)        startRead();      assert.deepStrictEqual(Buffer.concat(chunks), content);      if (++done === N) {        const retainedMemory =          [...arrayBuffers].map((ab) => ab.byteLength).reduce((a, b) => a + b);        assert(retainedMemory / (N * content.length) <= 3,               `Retaining ${retainedMemory} bytes in ABs for ${N} ` +               `chunks of size ${content.length}`);      }    }));}
// Don’t start the reads all at once – that way we would have to allocate// a large amount of memory upfront.for (let i = 0; i < 6; ++i)  startRead();