| // 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'); |
| |
| // this test verifies that passing a huge number to read(size) |
| // will push up the highWaterMark, and cause the stream to read |
| // more data continuously, but without triggering a nextTick |
| // warning or RangeError. |
| |
| var Readable = require('stream').Readable; |
| |
| // throw an error if we trigger a nextTick warning. |
| process.throwDeprecation = true; |
| |
| var stream = new Readable({ highWaterMark: 2 }); |
| var reads = 0; |
| var total = 5000; |
| stream._read = function(size) { |
| reads++; |
| size = Math.min(size, total); |
| total -= size; |
| if (size === 0) |
| stream.push(null); |
| else |
| stream.push(new Buffer(size)); |
| }; |
| |
| var depth = 0; |
| |
| function flow(stream, size, callback) { |
| depth += 1; |
| var chunk = stream.read(size); |
| |
| if (!chunk) |
| stream.once('readable', flow.bind(null, stream, size, callback)); |
| else |
| callback(chunk); |
| |
| depth -= 1; |
| console.log('flow(' + depth + '): exit'); |
| } |
| |
| flow(stream, 5000, function() { |
| console.log('complete (' + depth + ')'); |
| }); |
| |
| process.on('exit', function(code) { |
| assert.equal(reads, 2); |
| // we pushed up the high water mark |
| assert.equal(stream._readableState.highWaterMark, 8192); |
| // length is 0 right now, because we pulled it all out. |
| assert.equal(stream._readableState.length, 0); |
| assert(!code); |
| assert.equal(depth, 0); |
| console.log('ok'); |
| }); |