deno.land / std@0.166.0 / node / _tools / test / parallel / test-stream-duplex.js
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// 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
// Copyright Joyent, Inc. and other Node contributors.//// Permission is hereby granted, free of charge, to any person obtaining a// copy of this software and associated documentation files (the// "Software"), to deal in the Software without restriction, including// without limitation the rights to use, copy, modify, merge, publish,// distribute, sublicense, and/or sell copies of the Software, and to permit// persons to whom the Software is furnished to do so, subject to the// following conditions://// The above copyright notice and this permission notice shall be included// in all copies or substantial portions of the Software.//// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE// USE OR OTHER DEALINGS IN THE SOFTWARE.'use strict';
const common = require('../common');const assert = require('assert');const Duplex = require('stream').Duplex;const { ReadableStream, WritableStream } = require('stream/web');
const stream = new Duplex({ objectMode: true });
assert(Duplex() instanceof Duplex);assert(stream._readableState.objectMode);assert(stream._writableState.objectMode);assert(stream.allowHalfOpen);assert.strictEqual(stream.listenerCount('end'), 0);
let written;let read;
stream._write = (obj, _, cb) => { written = obj; cb();};
stream._read = () => {};
stream.on('data', (obj) => { read = obj;});
stream.push({ val: 1 });stream.end({ val: 2 });
process.on('exit', () => { assert.strictEqual(read.val, 1); assert.strictEqual(written.val, 2);});
// Duplex.fromWeb{ const dataToRead = Buffer.from('hello'); const dataToWrite = Buffer.from('world');
const readable = new ReadableStream({ start(controller) { controller.enqueue(dataToRead); }, });
const writable = new WritableStream({ write: common.mustCall((chunk) => { assert.strictEqual(chunk, dataToWrite); }) });
const pair = { readable, writable }; const duplex = Duplex.fromWeb(pair);
duplex.write(dataToWrite); duplex.once('data', common.mustCall((chunk) => { assert.strictEqual(chunk, dataToRead); }));}
// Duplex.fromWeb - using utf8 and objectMode{ const dataToRead = 'hello'; const dataToWrite = 'world';
const readable = new ReadableStream({ start(controller) { controller.enqueue(dataToRead); }, });
const writable = new WritableStream({ write: common.mustCall((chunk) => { assert.strictEqual(chunk, dataToWrite); }) });
const pair = { readable, writable }; const duplex = Duplex.fromWeb(pair, { encoding: 'utf8', objectMode: true });
duplex.write(dataToWrite); duplex.once('data', common.mustCall((chunk) => { assert.strictEqual(chunk, dataToRead); }));}// Duplex.toWeb{ const dataToRead = Buffer.from('hello'); const dataToWrite = Buffer.from('world');
const duplex = Duplex({ read() { this.push(dataToRead); this.push(null); }, write: common.mustCall((chunk) => { assert.strictEqual(chunk, dataToWrite); }) });
const { writable, readable } = Duplex.toWeb(duplex); writable.getWriter().write(dataToWrite);
readable.getReader().read().then(common.mustCall((result) => { assert.deepStrictEqual(Buffer.from(result.value), dataToRead); }));}
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