1// Copyright Joyent, Inc. and other Node contributors. 2// 3// Permission is hereby granted, free of charge, to any person obtaining a 4// copy of this software and associated documentation files (the 5// "Software"), to deal in the Software without restriction, including 6// without limitation the rights to use, copy, modify, merge, publish, 7// distribute, sublicense, and/or sell copies of the Software, and to permit 8// persons to whom the Software is furnished to do so, subject to the 9// following conditions: 10// 11// The above copyright notice and this permission notice shall be included 12// in all copies or substantial portions of the Software. 13// 14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 15// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 16// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 17// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 18// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 19// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 20// USE OR OTHER DEALINGS IN THE SOFTWARE. 21 22'use strict'; 23require('../common'); 24const assert = require('assert'); 25const stream = require('stream'); 26 27const chunk = Buffer.from('hallo'); 28 29class TestWriter extends stream.Writable { 30 _write(buffer, encoding, callback) { 31 callback(null); 32 } 33} 34 35const dest = new TestWriter(); 36 37// Set this high so that we'd trigger a nextTick warning 38// and/or RangeError if we do maybeReadMore wrong. 39class TestReader extends stream.Readable { 40 constructor() { 41 super({ 42 highWaterMark: 0x10000 43 }); 44 } 45 46 _read(size) { 47 this.push(chunk); 48 } 49} 50 51const src = new TestReader(); 52 53for (let i = 0; i < 10; i++) { 54 src.pipe(dest); 55 src.unpipe(dest); 56} 57 58assert.strictEqual(src.listeners('end').length, 0); 59assert.strictEqual(src.listeners('readable').length, 0); 60 61assert.strictEqual(dest.listeners('unpipe').length, 0); 62assert.strictEqual(dest.listeners('drain').length, 0); 63assert.strictEqual(dest.listeners('error').length, 0); 64assert.strictEqual(dest.listeners('close').length, 0); 65assert.strictEqual(dest.listeners('finish').length, 0); 66 67console.error(src._readableState); 68process.on('exit', function() { 69 src.readableBuffer.length = 0; 70 console.error(src._readableState); 71 assert(src.readableLength >= src.readableHighWaterMark); 72 console.log('ok'); 73}); 74