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// 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.
'use strict';
require('../common');
const 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.
const Readable = require('stream').Readable;
// throw an error if we trigger a nextTick warning.
process.throwDeprecation = true;
const stream = new Readable({ highWaterMark: 2 });
let reads = 0;
let total = 5000;
stream._read = function(size) {
reads++;
size = Math.min(size, total);
total -= size;
if (size === 0)
stream.push(null);
else
stream.push(Buffer.allocUnsafe(size));
};
let depth = 0;
function flow(stream, size, callback) {
depth += 1;
const 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.strictEqual(reads, 2);
// we pushed up the high water mark
assert.strictEqual(stream.readableHighWaterMark, 8192);
// length is 0 right now, because we pulled it all out.
assert.strictEqual(stream.readableLength, 0);
assert(!code);
assert.strictEqual(depth, 0);
console.log('ok');
});
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