deno.land / std@0.166.0 / node / _tools / test / parallel / test-stream-pipe-cleanup.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';// This test asserts that Stream.prototype.pipe does not leave listeners// hanging on the source or dest.require('../common');const stream = require('stream');const assert = require('assert');
function Writable() { this.writable = true; this.endCalls = 0; stream.Stream.call(this);}Object.setPrototypeOf(Writable.prototype, stream.Stream.prototype);Object.setPrototypeOf(Writable, stream.Stream);Writable.prototype.end = function() { this.endCalls++;};
Writable.prototype.destroy = function() { this.endCalls++;};
function Readable() { this.readable = true; stream.Stream.call(this);}Object.setPrototypeOf(Readable.prototype, stream.Stream.prototype);Object.setPrototypeOf(Readable, stream.Stream);
function Duplex() { this.readable = true; Writable.call(this);}Object.setPrototypeOf(Duplex.prototype, Writable.prototype);Object.setPrototypeOf(Duplex, Writable);
let i = 0;const limit = 100;
let w = new Writable();
let r;
for (i = 0; i < limit; i++) { r = new Readable(); r.pipe(w); r.emit('end');}assert.strictEqual(r.listeners('end').length, 0);assert.strictEqual(w.endCalls, limit);
w.endCalls = 0;
for (i = 0; i < limit; i++) { r = new Readable(); r.pipe(w); r.emit('close');}assert.strictEqual(r.listeners('close').length, 0);assert.strictEqual(w.endCalls, limit);
w.endCalls = 0;
r = new Readable();
for (i = 0; i < limit; i++) { w = new Writable(); r.pipe(w); w.emit('close');}assert.strictEqual(w.listeners('close').length, 0);
r = new Readable();w = new Writable();const d = new Duplex();r.pipe(d); // pipeline Ad.pipe(w); // pipeline Bassert.strictEqual(r.listeners('end').length, 2); // A.onend, A.cleanupassert.strictEqual(r.listeners('close').length, 2); // A.onclose, A.cleanupassert.strictEqual(d.listeners('end').length, 2); // B.onend, B.cleanup// A.cleanup, B.onclose, B.cleanupassert.strictEqual(d.listeners('close').length, 3);assert.strictEqual(w.listeners('end').length, 0);assert.strictEqual(w.listeners('close').length, 1); // B.cleanup
r.emit('end');assert.strictEqual(d.endCalls, 1);assert.strictEqual(w.endCalls, 0);assert.strictEqual(r.listeners('end').length, 0);assert.strictEqual(r.listeners('close').length, 0);assert.strictEqual(d.listeners('end').length, 2); // B.onend, B.cleanupassert.strictEqual(d.listeners('close').length, 2); // B.onclose, B.cleanupassert.strictEqual(w.listeners('end').length, 0);assert.strictEqual(w.listeners('close').length, 1); // B.cleanup
d.emit('end');assert.strictEqual(d.endCalls, 1);assert.strictEqual(w.endCalls, 1);assert.strictEqual(r.listeners('end').length, 0);assert.strictEqual(r.listeners('close').length, 0);assert.strictEqual(d.listeners('end').length, 0);assert.strictEqual(d.listeners('close').length, 0);assert.strictEqual(w.listeners('end').length, 0);assert.strictEqual(w.listeners('close').length, 0);
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