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'; 23const common = require('../common'); 24const assert = require('assert'); 25 26// If everything aligns so that you do a read(n) of exactly the 27// remaining buffer, then make sure that 'end' still emits. 28 29const READSIZE = 100; 30const PUSHSIZE = 20; 31const PUSHCOUNT = 1000; 32const HWM = 50; 33 34const Readable = require('stream').Readable; 35const r = new Readable({ 36 highWaterMark: HWM 37}); 38const rs = r._readableState; 39 40r._read = push; 41 42r.on('readable', function() { 43 console.error('>> readable'); 44 let ret; 45 do { 46 console.error(` > read(${READSIZE})`); 47 ret = r.read(READSIZE); 48 console.error(` < ${ret && ret.length} (${rs.length} remain)`); 49 } while (ret && ret.length === READSIZE); 50 51 console.error('<< after read()', 52 ret && ret.length, 53 rs.needReadable, 54 rs.length); 55}); 56 57r.on('end', common.mustCall(function() { 58 assert.strictEqual(pushes, PUSHCOUNT + 1); 59})); 60 61let pushes = 0; 62function push() { 63 if (pushes > PUSHCOUNT) 64 return; 65 66 if (pushes++ === PUSHCOUNT) { 67 console.error(' push(EOF)'); 68 return r.push(null); 69 } 70 71 console.error(` push #${pushes}`); 72 if (r.push(Buffer.allocUnsafe(PUSHSIZE))) 73 setTimeout(push, 1); 74} 75