| // 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. |
| |
| var common = require('../common'); |
| var assert = require('assert'); |
| |
| var Readable = require('stream').Readable; |
| |
| test1(); |
| test2(); |
| |
| function test1() { |
| var r = new Readable(); |
| |
| // should not end when we get a Buffer(0) or '' as the _read result |
| // that just means that there is *temporarily* no data, but to go |
| // ahead and try again later. |
| // |
| // note that this is very unusual. it only works for crypto streams |
| // because the other side of the stream will call read(0) to cycle |
| // data through openssl. that's why we set the timeouts to call |
| // r.read(0) again later, otherwise there is no more work being done |
| // and the process just exits. |
| |
| var buf = new Buffer(5); |
| buf.fill('x'); |
| var reads = 5; |
| r._read = function(n) { |
| switch (reads--) { |
| case 0: |
| return r.push(null); // EOF |
| case 1: |
| return r.push(buf); |
| case 2: |
| setTimeout(r.read.bind(r, 0), 10); |
| return r.push(new Buffer(0)); // Not-EOF! |
| case 3: |
| setTimeout(r.read.bind(r, 0), 10); |
| return process.nextTick(function() { |
| return r.push(new Buffer(0)); |
| }); |
| case 4: |
| setTimeout(r.read.bind(r, 0), 10); |
| return setTimeout(function() { |
| return r.push(new Buffer(0)); |
| }); |
| case 5: |
| return setTimeout(function() { |
| return r.push(buf); |
| }); |
| default: |
| throw new Error('unreachable'); |
| } |
| }; |
| |
| var results = []; |
| function flow() { |
| var chunk; |
| while (null !== (chunk = r.read())) |
| results.push(chunk + ''); |
| } |
| r.on('readable', flow); |
| r.on('end', function() { |
| results.push('EOF'); |
| }); |
| flow(); |
| |
| process.on('exit', function() { |
| assert.deepEqual(results, [ 'xxxxx', 'xxxxx', 'EOF' ]); |
| console.log('ok'); |
| }); |
| } |
| |
| function test2() { |
| var r = new Readable({ encoding: 'base64' }); |
| var reads = 5; |
| r._read = function(n) { |
| if (!reads--) |
| return r.push(null); // EOF |
| else |
| return r.push(new Buffer('x')); |
| }; |
| |
| var results = []; |
| function flow() { |
| var chunk; |
| while (null !== (chunk = r.read())) |
| results.push(chunk + ''); |
| } |
| r.on('readable', flow); |
| r.on('end', function() { |
| results.push('EOF'); |
| }); |
| flow(); |
| |
| process.on('exit', function() { |
| assert.deepEqual(results, [ 'eHh4', 'eHg=', 'EOF' ]); |
| console.log('ok'); |
| }); |
| } |