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If the consumer of a Readable is asking for N bytes, and N > hwm, then clearly we have set the hwm to low, and ought to increase it. Fix #4931v0.9.12-release
isaacs
12 years ago
2 changed files with 74 additions and 0 deletions
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// Copyright Joyent, Inc. and other Node contributors.
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//
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// The above copyright notice and this permission notice shall be included
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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var common = require('../common'); |
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var assert = require('assert'); |
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// this test verifies that passing a huge number to read(size)
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// will push up the highWaterMark, and cause the stream to read
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// more data continuously, but without triggering a nextTick
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// warning or RangeError.
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var Readable = require('stream').Readable; |
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// throw an error if we trigger a nextTick warning.
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process.throwDeprecation = true; |
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var stream = new Readable({ highWaterMark: 2, bufferSize: 2 }); |
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var reads = 0; |
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stream._read = function(size) { |
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reads++; |
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stream.push(new Buffer(size)); |
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}; |
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var depth = 0; |
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function flow(stream, size, callback) { |
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depth += 1; |
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var chunk = stream.read(size); |
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if (!chunk) |
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stream.once('readable', flow.bind(null, stream, size, callback)); |
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else |
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callback(chunk); |
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depth -= 1; |
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console.log('flow(' + depth + '): exit'); |
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} |
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flow(stream, 5000, function() { |
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console.log('complete (' + depth + ')'); |
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}); |
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process.on('exit', function(code) { |
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assert.equal(reads, 5000); |
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// we pushed up the high water mark
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assert.equal(stream._readableState.highWaterMark, 5000); |
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assert.equal(stream._readableState.length, 5000); |
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assert(!code); |
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assert.equal(depth, 0); |
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console.log('ok'); |
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}); |
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