deno.land / std@0.166.0 / node / _tools / test / parallel / test-streams-highwatermark.js

test-streams-highwatermark.js
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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 assert = require('assert');const stream = require('stream');const { inspect } = require('util');
{ // This test ensures that the stream implementation correctly handles values // for highWaterMark which exceed the range of signed 32 bit integers and // rejects invalid values.
// This number exceeds the range of 32 bit integer arithmetic but should still // be handled correctly. const ovfl = Number.MAX_SAFE_INTEGER;
const readable = stream.Readable({ highWaterMark: ovfl }); assert.strictEqual(readable._readableState.highWaterMark, ovfl);
const writable = stream.Writable({ highWaterMark: ovfl }); assert.strictEqual(writable._writableState.highWaterMark, ovfl);
for (const invalidHwm of [true, false, '5', {}, -5, NaN]) { for (const type of [stream.Readable, stream.Writable]) { assert.throws(() => { type({ highWaterMark: invalidHwm }); }, { name: 'TypeError', code: 'ERR_INVALID_ARG_VALUE', message: "The property 'options.highWaterMark' is invalid. " + `Received ${inspect(invalidHwm)}` }); } }}
{ // This test ensures that the push method's implementation // correctly handles the edge case where the highWaterMark and // the state.length are both zero
const readable = stream.Readable({ highWaterMark: 0 });
for (let i = 0; i < 3; i++) { const needMoreData = readable.push(); assert.strictEqual(needMoreData, true); }}
{ // This test ensures that the read(n) method's implementation // correctly handles the edge case where the highWaterMark, state.length // and n are all zero
const readable = stream.Readable({ highWaterMark: 0 });
readable._read = common.mustCall(); readable.read(0);}
{ // Parse size as decimal integer ['1', '1.0', 1].forEach((size) => { const readable = new stream.Readable({ read: common.mustCall(), highWaterMark: 0, }); readable.read(size);
assert.strictEqual(readable._readableState.highWaterMark, Number(size)); });}
{ // Test highwatermark limit const hwm = 0x40000000 + 1; const readable = stream.Readable({ read() {}, });
assert.throws(() => readable.read(hwm), common.expectsError({ code: 'ERR_OUT_OF_RANGE', message: 'The value of "size" is out of range.' + ' It must be <= 1GiB. Received ' + hwm, }));}
std

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Tagged at
a year ago