node/test/common/duplexpair.js
Gus Caplan 6934792eb3 lint: move eslint to new plugin system
PR-URL: https://github.com/nodejs/node/pull/18566
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
2018-02-20 13:13:22 -06:00

46 lines
1.0 KiB
JavaScript

/* eslint-disable node-core/required-modules */
'use strict';
const { Duplex } = require('stream');
const assert = require('assert');
const kCallback = Symbol('Callback');
const kOtherSide = Symbol('Other');
class DuplexSocket extends Duplex {
constructor() {
super();
this[kCallback] = null;
this[kOtherSide] = null;
}
_read() {
const callback = this[kCallback];
if (callback) {
this[kCallback] = null;
callback();
}
}
_write(chunk, encoding, callback) {
assert.notStrictEqual(this[kOtherSide], null);
assert.strictEqual(this[kOtherSide][kCallback], null);
this[kOtherSide][kCallback] = callback;
this[kOtherSide].push(chunk);
}
_final(callback) {
this[kOtherSide].on('end', callback);
this[kOtherSide].push(null);
}
}
function makeDuplexPair() {
const clientSide = new DuplexSocket();
const serverSide = new DuplexSocket();
clientSide[kOtherSide] = serverSide;
serverSide[kOtherSide] = clientSide;
return { clientSide, serverSide };
}
module.exports = makeDuplexPair;