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'); 25 26const stream = require('stream'); 27 28class MyWritable extends stream.Writable { 29 constructor(fn, options) { 30 super(options); 31 this.fn = fn; 32 } 33 34 _write(chunk, encoding, callback) { 35 this.fn(Buffer.isBuffer(chunk), typeof chunk, encoding); 36 callback(); 37 } 38} 39 40{ 41 const m = new MyWritable(function(isBuffer, type, enc) { 42 assert(isBuffer); 43 assert.strictEqual(type, 'object'); 44 assert.strictEqual(enc, 'buffer'); 45 }, { decodeStrings: true }); 46 m.write('some-text', 'utf8'); 47 m.end(); 48} 49 50{ 51 const m = new MyWritable(function(isBuffer, type, enc) { 52 assert(!isBuffer); 53 assert.strictEqual(type, 'string'); 54 assert.strictEqual(enc, 'utf8'); 55 }, { decodeStrings: false }); 56 m.write('some-text', 'utf8'); 57 m.end(); 58} 59