74 lines
2.3 KiB
JavaScript
74 lines
2.3 KiB
JavaScript
//
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// This code was copied from
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// https://github.com/nodejs/node/blob/c506660f3267/test/common/duplexpair.js
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//
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// Copyright Node.js contributors. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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'use strict';
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const assert = require('assert');
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const { Duplex } = require('stream');
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const kCallback = Symbol('Callback');
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const kOtherSide = Symbol('Other');
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class DuplexSocket extends Duplex {
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constructor() {
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super();
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this[kCallback] = null;
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this[kOtherSide] = null;
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}
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_read() {
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const callback = this[kCallback];
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if (callback) {
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this[kCallback] = null;
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callback();
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}
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}
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_write(chunk, encoding, callback) {
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assert.notStrictEqual(this[kOtherSide], null);
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assert.strictEqual(this[kOtherSide][kCallback], null);
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if (chunk.length === 0) {
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process.nextTick(callback);
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} else {
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this[kOtherSide].push(chunk);
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this[kOtherSide][kCallback] = callback;
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}
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}
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_final(callback) {
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this[kOtherSide].on('end', callback);
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this[kOtherSide].push(null);
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}
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}
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function makeDuplexPair() {
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const clientSide = new DuplexSocket();
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const serverSide = new DuplexSocket();
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clientSide[kOtherSide] = serverSide;
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serverSide[kOtherSide] = clientSide;
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return { clientSide, serverSide };
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}
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module.exports = makeDuplexPair;
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